          # [IUCr Home Page] [CIF Home Page] [CBF/imgCIF] [CBFlib] #

                                # imgCIF/CBF #

                          # Extensions Dictionary #

data_cif_img.dic

    _datablock.id               cif_img.dic
    _datablock.description
;
##############################################################################
#                                                                            #
#                       Image CIF Dictionary (imgCIF)                        #
#             and Crystallographic Binary File Dictionary (CBF)              #
#            Extending the Macromolecular CIF Dictionary (mmCIF)             #
#                                                                            #
#                              Version 1.8.2                                 #
#                              of 2021-02-21                                 #
#    ###################################################################     #
#    # *** WARNING *** THIS IS A DRAFT FOR DISCUSSSION *** WARNING *** #     #
#    #                 SUBJECT TO CHANGE WITHOUT NOTICE                #     #
#    #       SEND COMMENTS TO imgcif-l@iucr.org CITING THE VERSION     #     #
#    ###################################################################     #
#                  This draft edited by H. J. Bernstein                      #
#                                                                            #
#     by Andrew P. Hammersley, Herbert J. Bernstein and John D. Westbrook    #
#                                                                            #
# This dictionary was adapted from format discussed at the imgCIF Workshop,  #
# held at BNL Oct 1997 and the Crystallographic Binary File Format Draft     #
# Proposal by Andrew Hammersley.  The first DDL 2.1 Version was created by   #
# John Westbrook.  This version is being prepared in support of the 2021     #
# revisions to ITVG, and was drafted by Herbert J. Bernstein and             #
# incorporates comments by James Hester, I. David Brown, John Westbrook,     #
# Brian McMahon, Bob Sweet, Paul Ellis, Harry Powell, Wilfred Li,            #
# Gotzon Madariaga, Frances C. Bernstein, Chris Nielsen, Nicola Ashcroft and #
# others and reflects comments in                                            #
# H. J. Bernstein, A. Foerster, A. Bhowmick, A. S. Brewster,                 #
# S. Brockhauser, L. Gelisio, D. R. Hall, F. Leonarski, V. Mariani,          #
# G. Santoni, C. Vonrhein, G. Winter, 2020. "Gold Standard for               #
# Macromolecular Crystallography Diffraction Data", IUCrJ 7:5                #
# 784 -- 792, https://doi.org/10.1107/S2052252520008672,                     #
#             https://doi.org//10.1107/S2052252520008672/ti5018sup1.pdf,     #
#             https://doi.org//10.1107/S2052252520008672/ti5018sup2.pdf      #
##############################################################################
#    CONTENTS
#
#        CATEGORY_GROUP_LIST
#        SUB_CATEGORY
#
#        category  ARRAY_DATA
#
#                  _array_data.array_id
#                  _array_data.binary_id
#                  _array_data.data
#                  _array_data.header_contents
#                  _array_data.header_convention
#                  _array_data.variant
#
#        category  ARRAY_ELEMENT_SIZE
#
#                  _array_element_size.array_id
#                  _array_element_size.index
#                  _array_element_size.size
#                  _array_element_size.variant
#
#        category  ARRAY_INTENSITIES
#
#                  _array_intensities.array_id
#                  _array_intensities.binary_id
#                  _array_intensities.details
#                  _array_intensities.gain
#                  _array_intensities.gain_esd
#                  _array_intensities.linearity
#                  _array_intensities.offset
#                  _array_intensities.overload
#                  _array_intensities.pixel_fast_bin_size
#                  _array_intensities.pixel_slow_bin_size
#                  _array_intensities.pixel_binning_method
#                  _array_intensities.scaling
#                  _array_intensities.undefined_value
#                  _array_intensities.underload
#                  _array_intensities.variant
#
#        category  ARRAY_STRUCTURE
#
#                  _array_structure.byte_order
#                  _array_structure.compression_type
#                  _array_structure.compression_type_flag
#                  _array_structure.encoding_type
#                  _array_structure.id
#                  _array_structure.variant
#
#        category  ARRAY_STRUCTURE_LIST
#
#                  _array_structure_list.axis_set_id
#                  _array_structure_list.array_id
#                  _array_structure_list.array_section_id
#                  _array_structure_list.dimension
#                  _array_structure_list.direction
#                  _array_structure_list.index
#                  _array_structure_list.precedence
#                  _array_structure_list.variant
#
#        category  ARRAY_STRUCTURE_LIST_SECTION
#
#                  _array_structure_list_section.array_id
#                  _array_structure_list_section.end
#                  _array_structure_list_section.id
#                  _array_structure_list_section.index
#                  _array_structure_list_section.start
#                  _array_structure_list_section.stride
#                  _array_structure_list_section.variant
#
#        category  ARRAY_STRUCTURE_LIST_AXIS
#
#                  _array_structure_list_axis.axis_id
#                  _array_structure_list_axis.axis_set_id
#                  _array_structure_list_axis.angle
#                  _array_structure_list_axis.angle_increment
#                  _array_structure_list_axis.angular_pitch
#                  _array_structure_list_axis.displacement
#                  _array_structure_list_axis.displacement_increment
#                  _array_structure_list_axis.fract_displacement
#                  _array_structure_list_axis.fract_displacement_increment
#                  _array_structure_list_axis.radial_pitch
#                  _array_structure_list_axis.reference_angle
#                  _array_structure_list_axis.reference_displacement
#                  _array_structure_list_axis.variant
#
#        category  AXIS
#
#                  _axis.depends_on
#                  _axis.equipment
#                  _axis.equipment_component
#                  _axis.id
#                  _axis.offset[1]
#                  _axis.offset[2]
#                  _axis.offset[3]
#                  _axis.rotation
#                  _axis.rotation_axis
#                  _axis.type
#                  _axis.system
#                  _axis.vector[1]
#                  _axis.vector[2]
#                  _axis.vector[3]
#                  _axis.variant
#
#        category  DIFFRN_DATA_FRAME
#
#                  _diffrn_data_frame.array_id
#                  _diffrn_data_frame.array_section_id
#                  _diffrn_data_frame.binary_id
#                  _diffrn_data_frame.center_fast
#                  _diffrn_data_frame.center_slow
#                  _diffrn_data_frame.center_units
#                  _diffrn_data_frame.detector_element_id
#                  _diffrn_data_frame.id
#                  _diffrn_data_frame.details
#                  _diffrn_data_frame.variant
#
#        category  DIFFRN_DETECTOR
#
#                  _diffrn_detector.details
#                  _diffrn_detector.detector
#                  _diffrn_detector.diffrn_id
#                  _diffrn_detector.dtime
#                  _diffrn_detector.gain_setting
#                  _diffrn_detector.id
#                  _diffrn_detector.layer_thickness
#                  _diffrn_detector.number_of_axes
#                  _diffrn_detector.type
#                  _diffrn_detector.variant
#
#        category  DIFFRN_DETECTOR_AXIS
#
#                  _diffrn_detector_axis.axis_id
#                  _diffrn_detector_axis.detector_id
#                  _diffrn_detector_axis.variant
#
#        category  DIFFRN_DETECTOR_ELEMENT
#
#                  _diffrn_detector_element.id
#                  _diffrn_detector_element.detector_id
#                  _diffrn_detector_element.reference_center_fast
#                  _diffrn_detector_element.reference_center_slow
#                  _diffrn_detector_element.reference_center_units
#                  _diffrn_detector_element.variant
#
#        category  DIFFRN_MEASUREMENT
#
#                  _diffrn_measurement.diffrn_id
#                  _diffrn_measurement.details
#                  _diffrn_measurement.device
#                  _diffrn_measurement.device_details
#                  _diffrn_measurement.device_type
#                  _diffrn_measurement.id
#                  _diffrn_measurement.method
#                  _diffrn_measurement.number_of_axes
#                  _diffrn_measurement.sample_detector_distance
#                  _diffrn_measurement.sample_detector_voffset
#                  _diffrn_measurement.specimen_support
#                  _diffrn_measurement.variant
#
#        category  DIFFRN_MEASUREMENT_AXIS
#
#                  _diffrn_measurement_axis.axis_id
#                  _diffrn_measurement_axis.measurement_device
#                  _diffrn_measurement_axis.measurement_id
#                  _diffrn_measurement_axis.variant
#
#        category  DIFFRN_RADIATION
#
#                  _diffrn_radiation.beam_width
#                  _diffrn_radiation.beam_height
#                  _diffrn_radiation.beam_flux
#                  _diffrn_radiation.collimation
#                  _diffrn_radiation.diffrn_id
#                  _diffrn_radiation.div_x_source
#                  _diffrn_radiation.div_y_source
#                  _diffrn_radiation.div_x_y_source
#                  _diffrn_radiation.filter_edge
#                  _diffrn_radiation.inhomogeneity
#                  _diffrn_radiation.monochromator
#                  _diffrn_radiation.polarisn_norm
#                  _diffrn_radiation.polarisn_ratio
#                  _diffrn_radiation.polarisn_norm_esd
#                  _diffrn_radiation.polarisn_ratio_esd
#                  _diffrn_radiation.polarizn_source_norm
#                  _diffrn_radiation.polarizn_source_norm_esd
#                  _diffrn_radiation.polarizn_source_ratio
#                  _diffrn_radiation.polarizn_source_ratio_esd
#                  _diffrn_radiation.polarizn_Stokes_I
#                  _diffrn_radiation.polarizn_Stokes_Q
#                  _diffrn_radiation.polarizn_Stokes_U
#                  _diffrn_radiation.polarizn_Stokes_V
#                  _diffrn_radiation.polarizn_Stokes_I_esd
#                  _diffrn_radiation.polarizn_Stokes_Q_esd
#                  _diffrn_radiation.polarizn_Stokes_U_esd
#                  _diffrn_radiation.polarizn_Stokes_V_esd
#                  _diffrn_radiation.probe
#                  _diffrn_radiation.type
#                  _diffrn_radiation.variant
#                  _diffrn_radiation.wavelength_id
#                  _diffrn_radiation.xray_symbol
#
#        category  DIFFRN_REFLN
#
#                  _diffrn_refln.frame_id
#                  _diffrn_refln.variant
#
#        category  DIFFRN_SCAN
#
#                  _diffrn_scan.id
#                  _diffrn_scan.date_end
#                  _diffrn_scan.date_end_estimated
#                  _diffrn_scan.date_start
#                  _diffrn_scan.integration_time
#                  _diffrn_scan.frame_id_start
#                  _diffrn_scan.frame_id_end
#                  _diffrn_scan.frames
#                  _diffrn_scan.time_period
#                  _diffrn_scan.time_rstrt_incr
#                  _diffrn_scan.variant
#
#        category  DIFFRN_SCAN_AXIS
#
#                  _diffrn_scan_axis.axis_id
#                  _diffrn_scan_axis.angle_start
#                  _diffrn_scan_axis.angle_range
#                  _diffrn_scan_axis.angle_increment
#                  _diffrn_scan_axis.angle_rstrt_incr
#                  _diffrn_scan_axis.displacement_start
#                  _diffrn_scan_axis.displacement_range
#                  _diffrn_scan_axis.displacement_increment
#                  _diffrn_scan_axis.displacement_rstrt_incr
#                  _diffrn_scan_axis.reference_angle
#                  _diffrn_scan_axis.reference_displacement
#                  _diffrn_scan_axis.scan_id
#                  _diffrn_scan_axis.variant
#
#        category  DIFFRN_SCAN_COLLECTION
#
#                  _diffrn_scan_collection.details
#                  _diffrn_scan_collection.scan_id
#                  _diffrn_scan_collection.type
#                  _diffrn_scan_collection.translation_width
#                  _diffrn_scan_collection.variant
#
#        category  DIFFRN_SCAN_FRAME
#
#                  _diffrn_scan_frame.date
#                  _diffrn_scan_frame.frame_id
#                  _diffrn_scan_frame.frame_number
#                  _diffrn_scan_frame.integration_time
#                  _diffrn_scan_frame.polarizn_Stokes_I
#                  _diffrn_scan_frame.polarizn_Stokes_Q
#                  _diffrn_scan_frame.polarizn_Stokes_U
#                  _diffrn_scan_frame.polarizn_Stokes_V
#                  _diffrn_scan_frame.polarizn_Stokes_I_esd
#                  _diffrn_scan_frame.polarizn_Stokes_Q_esd
#                  _diffrn_scan_frame.polarizn_Stokes_U_esd
#                  _diffrn_scan_frame.polarizn_Stokes_V_esd
#                  _diffrn_scan_frame.scan_id
#                  _diffrn_scan_frame.time_period
#                  _diffrn_scan_frame.time_rstrt_incr
#                  _diffrn_scan_frame.variant
#
#        category  DIFFRN_SCAN_FRAME_AXIS
#
#                  _diffrn_scan_frame_axis.axis_id
#                  _diffrn_scan_frame_axis.angle
#                  _diffrn_scan_frame_axis.angle_increment
#                  _diffrn_scan_frame_axis.angle_rstrt_incr
#                  _diffrn_scan_frame_axis.displacement
#                  _diffrn_scan_frame_axis.displacement_increment
#                  _diffrn_scan_frame_axis.displacement_rstrt_incr
#                  _diffrn_scan_frame_axis.reference_angle
#                  _diffrn_scan_frame_axis.reference_displacement
#                  _diffrn_scan_frame_axis.frame_id
#                  _diffrn_scan_frame_axis.variant
#
#        category  DIFFRN_SCAN_FRAME_MONITOR
#
#                  _diffrn_scan_frame_monitor.id
#                  _diffrn_scan_frame_monitor.detector_id
#                  _diffrn_scan_frame_monitor.scan_id
#                  _diffrn_scan_frame_monitor.frame_id
#                  _diffrn_scan_frame_monitor.integration_time
#                  _diffrn_scan_frame_monitor.monitor_value
#                  _diffrn_scan_frame_monitor.variant
#
#        category  MAP
#
#                  _map.details
#                  _map.diffrn_id
#                  _map.entry_id
#                  _map.id
#                  _map.variant
#
#       category   MAP_SEGMENT
#
#                  _map_segment.array_id
#                  _map_segment.array_section_id
#                  _map_segment.binary_id
#                  _map_segment.mask_array_id
#                  _map_segment.mask_array_section_id
#                  _map_segment.mask_binary_id
#                  _map_segment.id
#                  _map_segment.map_id
#                  _map_segment.details
#                  _map_segment.variant
#
#       category   VARIANT
#
#                  _variant.details
#                  _variant.diffrn_id
#                  _variant.entry_id
#                  _variant.role
#                  _variant.timestamp
#                  _variant.variant
#                  _variant.variant_of
#
#       ***DEPRECATED*** data items
#
#                  _diffrn_detector_axis.id
#                  _diffrn_detector_element.center[1]
#                  _diffrn_detector_element.center[2]
#                  _diffrn_measurement_axis.id
#
#       ***DEPRECATED*** category  DIFFRN_FRAME_DATA
#
#                  _diffrn_frame_data.array_id
#                  _diffrn_frame_data.binary_id
#                  _diffrn_frame_data.detector_element_id
#                  _diffrn_frame_data.id
#                  _diffrn_frame_data.details
#
#
#        ITEM_TYPE_LIST
#        ITEM_UNITS_LIST
#        DICTIONARY_HISTORY
#
##############################################################################


+--------------------------------------------------------------------------------------------------------------------+
#ARRAY_DATA_GROUP|Categories that describe array data.                                                               |
#                |---------------------------------------------------------------------------------------------------|
#                |+-------------------------------------------------------------------------------------------------+|
#                || ARRAY_DATA               | Data items in the ARRAY_DATA category are the containers for the     ||
#                ||                          | array data items described in the category ARRAY_STRUCTURE.          ||
#                ||                          |                                                                      ||
#                ||                          | It is recognized that the data in this category needs to be used in  ||
#                ||                          | two distinct ways. During a data collection the lack of ancillary    ||
#                ||                          | data and timing constraints in processing data may dictate the need  ||
#                ||                          | to make a 'miniCBF' nothing more than an essential minimum of        ||
#                ||                          | information to record the results of the data collection. In that    ||
#                ||                          | case it is proper to use the ARRAY_DATA category as a container for  ||
#                ||                          | just a single image and a compacted, beam-line dependent list of     ||
#                ||                          | data collection parameter values. In such a case, only the tags      ||
#                ||                          | '_array_data.header_convention', '_array_data.header_contents' and   ||
#                ||                          | '_array_data.data' need be populated.                                ||
#                ||                          |                                                                      ||
#                ||                          | For full processing and archiving, most of the tags in this          ||
#                ||                          | dictionary will need to be populated.                                ||
#                ||--------------------------+----------------------------------------------------------------------||
#                || ARRAY_ELEMENT_SIZE       | Data items in the ARRAY_ELEMENT_SIZE category record the physical    ||
#                ||                          | size of array elements along each array dimension.                   ||
#                ||--------------------------+----------------------------------------------------------------------||
#                || ARRAY_INTENSITIES        | Data items in the ARRAY_INTENSITIES category record the information  ||
#                ||                          | required to recover the intensity data from the set of data values   ||
#                ||                          | stored in the ARRAY_DATA category.                                   ||
#                ||                          |                                                                      ||
#                ||                          | The detector may have a complex relationship between the raw         ||
#                ||                          | intensity values and the number of incident photons. In most cases,  ||
#                ||                          | the number stored in the final array will have a simple linear       ||
#                ||                          | relationship to the actual number of incident photons, given by      ||
#                ||                          | _array_intensities.gain. If raw, uncorrected values are presented    ||
#                ||                          | (e.g. for calibration experiments), the value of                     ||
#                ||                          | _array_intensities.linearity will be 'raw' and                       ||
#                ||                          | _array_intensities.gain will not be used.                            ||
#                ||--------------------------+----------------------------------------------------------------------||
#                || ARRAY_STRUCTURE          | Data items in the ARRAY_STRUCTURE category record the organization   ||
#                ||                          | and encoding of array data that may be stored in the ARRAY_DATA      ||
#                ||                          | category.                                                            ||
#                ||-------------------------------------------------------------------------------------------------||
#                || +---------------------------------------------------------------------------------------------+ ||
#                || |   | ARRAY_STRUCTURE_LIST         | Data items in the ARRAY_STRUCTURE_LIST category record   | ||
#                || |   |                              | the size and organization of each array dimension.       | ||
#                || |   |                              |                                                          | ||
#                || |   |                              | The relationship to physical axes may be given.          | ||
#                || |   |-----------------------------------------------------------------------------------------| ||
#                || |   | +-------------------------------------------------------------------------------------+ | ||
#                || |   | |   | ARRAY_STRUCTURE_LIST_SECTION | Data items in the ARRAY_STRUCTURE_LIST_SECTION   | | ||
#                || |   | |   |                              | category identify the dimension-by-dimension     | | ||
#                || |   | |   |                              | start, end and stride of each section of an      | | ||
#                || |   | |   |                              | array that is to be referenced.                  | | ||
#                || |   | |   |                              |                                                  | | ||
#                || |   | |   |                              | For any array of array_id, ARRAYID, array        | | ||
#                || |   | |   |                              | section ids of the form                          | | ||
#                || |   | |   |                              | ARRAYID(start1:end1:stride1,start2:end2:stride2, | | ||
#                || |   | |   |                              | ...)                                             | | ||
#                || |   | |   |                              | are defined by default.                          | | ||
#                || |   | |   |------------------------------+--------------------------------------------------| | ||
#                || |   | |   | ARRAY_STRUCTURE_LIST_AXIS    | Data items in the ARRAY_STRUCTURE_LIST_AXIS      | | ||
#                || |   | |   |                              | category describe the physical settings of sets  | | ||
#                || |   | |   |                              | of axes for the centres of pixels that           | | ||
#                || |   | |   |                              | correspond to data points described in the       | | ||
#                || |   | |   |                              | ARRAY_STRUCTURE_LIST category.                   | | ||
#                || |   | |   |                              |                                                  | | ||
#                || |   | |   |                              | In the simplest cases, the physical increments   | | ||
#                || |   | |   |                              | of a single axis correspond to the increments of | | ||
#                || |   | |   |                              | a single array index. More complex               | | ||
#                || |   | |   |                              | organizations, e.g. spiral scans, may require    | | ||
#                || |   | |   |                              | coupled motions along multiple axes.             | | ||
#                || |   | |   |                              |                                                  | | ||
#                || |   | |   |                              | Note that a spiral scan uses two coupled axes:   | | ||
#                || |   | |   |                              | one for the angular direction and one for the    | | ||
#                || |   | |   |                              | radial direction. This differs from a            | | ||
#                || |   | |   |                              | cylindrical scan for which the two axes are not  | | ||
#                || |   | |   |                              | coupled into one set.                            | | ||
#                || |   | +-------------------------------------------------------------------------------------+ | ||
#                || |   |-----------------------------------------------------------------------------------------| ||
#                || +---------------------------------------------------------------------------------------------+ ||
#                |+-------------------------------------------------------------------------------------------------+|
#----------------+---------------------------------------------------------------------------------------------------|
#AXIS_GROUP      |Categories that describe axes.                                                                     |
#                |---------------------------------------------------------------------------------------------------|
#                |+-------------------------------------------------------------------------------------------------+|
#                || AXIS | Data items in the AXIS category record the information required to describe the various  ||
#                ||      | goniometer, detector, source and other axes needed to specify a data collection or the   ||
#                ||      | axes defining the coordinate system of an image.                                         ||
#                ||      |                                                                                          ||
#                ||      | The location of each axis is specified by two vectors: the axis itself, given by a unit  ||
#                ||      | vector in the direction of the axis, and an offset to the base of the unit vector.       ||
#                ||      |                                                                                          ||
#                ||      | The vectors defining an axis are referenced to an appropriate coordinate system. The     ||
#                ||      | axis vector, itself, is a dimensionless unit vector. Where meaningful, the offset vector ||
#                ||      | is given in millimetres. In coordinate systems not measured in metres, the offset is not ||
#                ||      | specified and is taken as zero.                                                          ||
#                ||      |                                                                                          ||
#                ||      | The available coordinate systems are:                                                    ||
#                ||      |                                                                                          ||
#                ||      | The imgCIF standard laboratory coordinate system                                         ||
#                ||      | The direct lattice (fractional atomic coordinates)                                       ||
#                ||      | The orthogonal Cartesian coordinate system (real space)                                  ||
#                ||      | The reciprocal lattice                                                                   ||
#                ||      | An abstract orthogonal Cartesian coordinate frame                                        ||
#                |+-------------------------------------------------------------------------------------------------+|
#----------------+---------------------------------------------------------------------------------------------------|
#DIFFRN_GROUP    |Categories that describe details of the diffraction experiment.                                    |
#                |---------------------------------------------------------------------------------------------------|
#                |+-------------------------------------------------------------------------------------------------+|
#                || DIFFRN_DATA_FRAME          | Data items in the DIFFRN_DATA_FRAME category record the details    ||
#                ||                            | about each frame of data.                                          ||
#                ||                            |                                                                    ||
#                ||                            | The items in this category were previously in a DIFFRN_FRAME_DATA  ||
#                ||                            | category, which is now deprecated. The items from the old category ||
#                ||                            | are provided as aliases but should not be used for new work.       ||
#                ||----------------------------+--------------------------------------------------------------------||
#                || DIFFRN_DETECTOR            | Data items in the DIFFRN_DETECTOR category describe the detector   ||
#                ||                            | used to measure the scattered radiation, including any analyser    ||
#                ||                            | and post-sample collimation.                                       ||
#                ||-------------------------------------------------------------------------------------------------||
#                || +---------------------------------------------------------------------------------------------+ ||
#                || |   | DIFFRN_DETECTOR_AXIS | Data items in the DIFFRN_DETECTOR_AXIS category associate axes   | ||
#                || |   |                      | with detectors.                                                  | ||
#                || +---------------------------------------------------------------------------------------------+ ||
#                ||-------------------------------------------------------------------------------------------------||
#                || +---------------------------------------------------------------------------------------------+ ||
#                || |   | DIFFRN_DETECTOR_ELEMENT | Data items in the DIFFRN_DETECTOR_ELEMENT category record the | ||
#                || |   |                         | details about spatial layout and other characteristics of     | ||
#                || |   |                         | each element of a detector which may have multiple elements.  | ||
#                || |   |                         |                                                               | ||
#                || |   |                         | In most cases, giving more detailed information in            | ||
#                || |   |                         | ARRAY_STRUCTURE_LIST and ARRAY_STRUCTURE_LIST_AXIS is         | ||
#                || |   |                         | preferable to simply providing the centre of the detector     | ||
#                || |   |                         | element.                                                      | ||
#                || +---------------------------------------------------------------------------------------------+ ||
#                ||-------------------------------------------------------------------------------------------------||
#                || DIFFRN_MEASUREMENT         | Data items in the DIFFRN_MEASUREMENT category record details about ||
#                ||                            | the device used to orient and/or position the crystal during data  ||
#                ||                            | measurement and the manner in which the diffraction data were      ||
#                ||                            | measured.                                                          ||
#                ||-------------------------------------------------------------------------------------------------||
#                || +---------------------------------------------------------------------------------------------+ ||
#                || |   | DIFFRN_MEASUREMENT_AXIS | Data items in the DIFFRN_MEASUREMENT_AXIS category associate  | ||
#                || |   |                         | axes with goniometers.                                        | ||
#                || +---------------------------------------------------------------------------------------------+ ||
#                ||-------------------------------------------------------------------------------------------------||
#                || DIFFRN_RADIATION           | Data items in the DIFFRN_RADIATION category describe the radiation ||
#                ||                            | used for measuring diffraction intensities, its collimation and    ||
#                ||                            | monochromatization before the sample.                              ||
#                ||                            |                                                                    ||
#                ||                            | Post-sample treatment of the beam is described by data items in    ||
#                ||                            | the DIFFRN_DETECTOR category.                                      ||
#                ||----------------------------+--------------------------------------------------------------------||
#                || DIFFRN_REFLN               | This category redefinition has been added to extend the key of the ||
#                ||                            | standard DIFFRN_REFLN category.                                    ||
#                ||                            |                                                                    ||
#                ||                            | Data items in the DIFFRN_REFLN category record details about the   ||
#                ||                            | intensities in the diffraction data set identified by              ||
#                ||                            | _diffrn_refln.diffrn_id.                                           ||
#                ||                            |                                                                    ||
#                ||                            | The DIFFRN_REFLN data items refer to individual intensity          ||
#                ||                            | measurements and must be included in looped lists.                 ||
#                ||                            |                                                                    ||
#                ||                            | The DIFFRN_REFLNS data items specify the parameters that apply to  ||
#                ||                            | all intensity measurements in the particular diffraction data set  ||
#                ||                            | identified by _diffrn_reflns.diffrn_id and _diffrn_refln.frame_id  ||
#                ||----------------------------+--------------------------------------------------------------------||
#                || DIFFRN_SCAN                | Data items in the DIFFRN_SCAN category describe the parameters of  ||
#                ||                            | one or more scans, relating axis positions to frames.              ||
#                ||-------------------------------------------------------------------------------------------------||
#                || +---------------------------------------------------------------------------------------------+ ||
#                || |   | DIFFRN_SCAN_AXIS | Data items in the DIFFRN_SCAN_AXIS category describe the settings of | ||
#                || |   |                  | axes for particular scans. Unspecified axes are assumed to be at     | ||
#                || |   |                  | their zero points.                                                   | ||
#                || +---------------------------------------------------------------------------------------------+ ||
#                ||-------------------------------------------------------------------------------------------------||
#                || +---------------------------------------------------------------------------------------------+ ||
#                || |   | DIFFRN_SCAN_COLLECTION | Data items in the DIFFRN_SCAN_COLLECTION category describe the | ||
#                || |   |                        | type of collection strategy involved in each scan.             | ||
#                || +---------------------------------------------------------------------------------------------+ ||
#                ||-------------------------------------------------------------------------------------------------||
#                || +---------------------------------------------------------------------------------------------+ ||
#                || |   | DIFFRN_SCAN_FRAME | Data items in the DIFFRN_SCAN_FRAME category describe the           | ||
#                || |   |                   | relationships of particular frames to scans.                        | ||
#                || +---------------------------------------------------------------------------------------------+ ||
#                ||-------------------------------------------------------------------------------------------------||
#                || +---------------------------------------------------------------------------------------------+ ||
#                || |   | +-------------------------------------------------------------------------------------+ | ||
#                || |   | |   | DIFFRN_SCAN_FRAME_AXIS | Data items in the DIFFRN_SCAN_FRAME_AXIS category      | | ||
#                || |   | |   |                        | describe the settings of axes for particular frames.   | | ||
#                || |   | |   |                        | Unspecified axes are assumed to be at their zero       | | ||
#                || |   | |   |                        | points. If, for any given frame, nonzero values apply  | | ||
#                || |   | |   |                        | for any of the data items in this category, those      | | ||
#                || |   | |   |                        | values should be given explicitly in this category and | | ||
#                || |   | |   |                        | not simply inferred from values in DIFFRN_SCAN_AXIS.   | | ||
#                || |   | +-------------------------------------------------------------------------------------+ | ||
#                || |---+-----------------------------------------------------------------------------------------| ||
#                || |   | +-------------------------------------------------------------------------------------+ | ||
#                || |   | |   | DIFFRN_SCAN_FRAME_MONITOR | Data items in the DIFFRN_SCAN_FRAME_MONITOR         | | ||
#                || |   | |   |                           | category record the values and details about each   | | ||
#                || |   | |   |                           | monitor for each frame of data during a scan.       | | ||
#                || |   | |   |                           |                                                     | | ||
#                || |   | |   |                           | Each monitor value is uniquely identified by the    | | ||
#                || |   | |   |                           | combination of the scan_id given by                 | | ||
#                || |   | |   |                           | _diffrn_scan_frame.scan_id the frame_id given by    | | ||
#                || |   | |   |                           | _diffrn_scan_frame_monitor.frame_id, the monitor's  | | ||
#                || |   | |   |                           | detector_id given by                                | | ||
#                || |   | |   |                           | _diffrn_scan_frame_monitor.detector_id, and a       | | ||
#                || |   | |   |                           | 1-based ordinal given by                            | | ||
#                || |   | |   |                           | _diffrn_scan_frame_monitor.id.                      | | ||
#                || |   | |   |                           |                                                     | | ||
#                || |   | |   |                           | If there is only one frame for the scan, the value  | | ||
#                || |   | |   |                           | of _diffrn_scan_frame_monitor.frame_id may be       | | ||
#                || |   | |   |                           | omitted.                                            | | ||
#                || |   | |   |                           |                                                     | | ||
#                || |   | |   |                           | A single frame may have more than one monitor       | | ||
#                || |   | |   |                           | value, and each monitor value may be the result of  | | ||
#                || |   | |   |                           | integration over the entire frame integration time  | | ||
#                || |   | |   |                           | given by the value of                               | | ||
#                || |   | |   |                           | _diffrn_scan_frame.integration_time or many monitor | | ||
#                || |   | |   |                           | values may be reported over shorter times given by  | | ||
#                || |   | |   |                           | the value of                                        | | ||
#                || |   | |   |                           | _diffrn_scan_frame_monitor.integration_time. If     | | ||
#                || |   | |   |                           | only one monitor value for a given monitor is       | | ||
#                || |   | |   |                           | collected during the integration time of the frame, | | ||
#                || |   | |   |                           | the value of _diffrn_scan_frame_monitor.id may be   | | ||
#                || |   | |   |                           | omitted.                                            | | ||
#                || |   | +-------------------------------------------------------------------------------------+ | ||
#                || +---------------------------------------------------------------------------------------------+ ||
#                |+-------------------------------------------------------------------------------------------------+|
#----------------+---------------------------------------------------------------------------------------------------|
#MAP_GROUP       |Categories that describe maps.                                                                     |
#                |---------------------------------------------------------------------------------------------------|
#                |+-------------------------------------------------------------------------------------------------+|
#                || MAP     | Data items in the MAP category record the details of a map. Maps record values of     ||
#                ||         | parameters, such as density, that are functions of position within a cell or are      ||
#                ||         | functions of orthogonal coordinates in three space.                                   ||
#                ||         |                                                                                       ||
#                ||         | A map may is composed of one or more map segments specified in the MAP_SEGMENT        ||
#                ||         | category.                                                                             ||
#                ||         |                                                                                       ||
#                ||         | Examples are given in the MAP_SEGMENT category.                                       ||
#                ||-------------------------------------------------------------------------------------------------||
#                || +---------------------------------------------------------------------------------------------+ ||
#                || |   | MAP_SEGMENT | Data items in the MAP_SEGMENT category record the details about each      | ||
#                || |   |             | segment (section or brick) of a map.                                      | ||
#                || +---------------------------------------------------------------------------------------------+ ||
#                |+-------------------------------------------------------------------------------------------------+|
#----------------+---------------------------------------------------------------------------------------------------|
#VARIANT_GROUP   |Categories that describe variants                                                                  |
#                |---------------------------------------------------------------------------------------------------|
#                |+-------------------------------------------------------------------------------------------------+|
#                || VARIANT | Data items in the VARIANT category record the details about sets of variants of data  ||
#                ||         | items.                                                                                ||
#                ||         |                                                                                       ||
#                ||         | There is sometimes a need to allow for multiple versions of the same data items in    ||
#                ||         | order to allow for refinements and corrections to earlier assumptions, observations   ||
#                ||         | and calculations. In order to allow data sets to contain more than one variant of the ||
#                ||         | same information, an optional ...variant data item as a pointer to _variant.variant   ||
#                ||         | has been added to the key of every category, as an implicit data item with a null     ||
#                ||         | (empty) default value.                                                                ||
#                ||         |                                                                                       ||
#                ||         | All rows in a category with the same variant value are considered to be related to    ||
#                ||         | one another and to all rows in other categories with the same variant value. For a    ||
#                ||         | given variant, all such rows are also considered to be related to all rows with a     ||
#                ||         | null variant value, except that a row with a null variant value is for which all      ||
#                ||         | other components of its key are identical to those entries in another row with a      ||
#                ||         | non-null variant value is not related the the rows with that non-null variant value.  ||
#                ||         | This behavior is similar to the convention for identifying alternate conformers in an ||
#                ||         | atom list.                                                                            ||
#                ||         |                                                                                       ||
#                ||         | An optional role may be specified for a variant as the value of _variant.role.        ||
#                ||         | Possible roles are null, "preferred", "raw data", "unsuccessful trial".               ||
#                ||         |                                                                                       ||
#                ||         | variants may carry an optional timestamp as the value of _variant.timestamp.          ||
#                ||         |                                                                                       ||
#                ||         | variants may be related to other variants from which they were derived by the value   ||
#                ||         | of _variant.variant_of                                                                ||
#                ||         |                                                                                       ||
#                ||         | Further details about the variant may be specified as the value of _variant.details.  ||
#                ||         |                                                                                       ||
#                ||         | In order to allow variant information from multiple datasets to be combined,          ||
#                ||         | _variant.diffrn_id and/or _variant.entry_id may be used.                              ||
#                |+-------------------------------------------------------------------------------------------------+|
+--------------------------------------------------------------------------------------------------------------------+


;


    _dictionary.title           cif_img.dic
    _dictionary.version         1.8.2
    _dictionary.datablock_id    cif_img.dic



#########################
## CATEGORY_GROUP_LIST ##
#########################

     loop_
    _category_group_list.id
    _category_group_list.parent_id
    _category_group_list.description
             'inclusive_group'   .
;             Categories that belong to the dictionary extension.
;
             'array_data_group'
             'inclusive_group'
;             Categories that describe array data.
;
             'axis_group'
             'inclusive_group'
;             Categories that describe axes.
;
             'diffrn_group'
             'inclusive_group'
;            Categories that describe details of the diffraction experiment.
;
             'map_group'
             'inclusive_group'
;            Categories that describe details of map data.
;
             'variant_group'
             'inclusive_group'
;            Categories that describe details of variants.
;


##################
## SUB_CATEGORY ##
##################

     loop_
    _sub_category.id
    _sub_category.description
              'matrix'
;              The collection of elements of a matrix.
;
              'vector'
;              The collection of elements of a vector.
;




##############
# ARRAY_DATA #
##############


save_array_data
    _category.description
;    Data items in the ARRAY_DATA category are the containers for
     the array data items described in the category ARRAY_STRUCTURE.
    
     It is recognized that the data in this category needs to be used in
     two distinct ways.  During a data collection the lack of ancillary
     data and timing constraints in processing data may dictate the
     need to make a 'miniCBF' nothing more than an essential minimum
     of information to record the results of the data collection.  In that
     case it is proper to use the ARRAY_DATA category as a
     container for just a single image and a compacted, beam-line
     dependent list of data collection parameter values.  In such
     a case, only the tags '_array_data.header_convention',
     '_array_data.header_contents' and '_array_data.data' need be
     populated.
    
     For full processing and archiving, most of the tags in this
     dictionary will need to be populated.
    
;
    _category.id                   array_data
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _array_data.array_id ARRAYID
    _array_data.binary_id BINARYID
    _array_data.data  DATAARRAY
    _array_data.header_contents HEADER
    _array_data.header_convention HEADERCONVENTION
   
    -->
   
    /entry:NXentry
     /instrument:NXinstrument
       /DETECTORNAME:NXdetector_group
       /DETECTORELEMENTNAME:NXdetector
           /data_ARRAYID_BINARYID -->
                /entry/data_ARRAYID_BINARYID/data_ARRAYID_BINARYID
            @CBF_array_id="ARRAYID"
            @CBF_binary_id="BINARYID"
            @CBF_header_contents="HEADER"
            @CBF_header_convention="HEADERCONVENTION"
;
     loop_
    _category_key.name             '_array_data.array_id'
                                   '_array_data.binary_id'
                                   '_array_data.variant'
     loop_
    _category_group.id             'inclusive_group'
                                   'array_data_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;
        Example 1 -

        This example shows two binary data blocks.  The first one
        was compressed by the CBF_CANONICAL compression algorithm and is
        presented as hexadecimal data.  The first character 'H' on the
        data lines means hexadecimal.  It could have been 'O' for octal
        or 'D' for decimal.  The second character on the line shows
        the number of bytes in each word (in this case '4'), which then
        requires eight hexadecimal digits per word.  The third character
        gives the order of octets within a word, in this case '<'
        for the ordering 4321 (i.e. 'big-endian').  Alternatively, the
        character '>' could have been used for the ordering 1234
        (i.e. 'little-endian').  The block has a 'message digest'
        to check the integrity of the data.

        The second block is similar, but uses CBF_PACKED compression
        and BASE64 encoding.  Note that the size and the digest are
        different.
;
;

        loop_
        _array_data.array_id
        _array_data.binary_id
        _array_data.data
        image_1 1
        ;
        --CIF-BINARY-FORMAT-SECTION--
        Content-Type: application/octet-stream;
             conversions="X-CBF_CANONICAL"
        Content-Transfer-Encoding: X-BASE16
        X-Binary-Size: 3927126
        X-Binary-ID: 1
        Content-MD5: u2sTJEovAHkmkDjPi+gWsg==

        # Hexadecimal encoding, byte 0, byte order ...21
        #
        H4< 0050B810 00000000 00000000 00000000 000F423F 00000000 00000000 ...
        ....
        --CIF-BINARY-FORMAT-SECTION----
        ;
        image_2 2
        ;
        --CIF-BINARY-FORMAT-SECTION--
        Content-Type: application/octet-stream;
             conversions="X-CBF-PACKED"
        Content-Transfer-Encoding: BASE64
        X-Binary-Size: 3745758
        X-Binary-ID: 2
        Content-MD5: 1zsJjWPfol2GYl2V+QSXrw==

        ELhQAAAAAAAA...
        ...
        --CIF-BINARY-FORMAT-SECTION----
        ;
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;
        Example 2 -

        This example shows a single image in a miniCBF, provided by
        E. Eikenberry.  The entire CBF consists of one data block
        containing one category and three tags.  The CBFlib
        program convert_miniCBF and a suitable template file
        can be used to convert this miniCBF to a full imgCIF
        file.
;
;
        ###CBF: VERSION 1.5
        # CBF file written by CBFlib v0.7.8

        data_insulin_pilatus6m

        _array_data.header_convention SLS_1.0
        _array_data.header_contents
        ;
        # Detector: PILATUS 6M SN: 60-0001
        # 2007/Jun/17 15:12:36.928
        # Pixel_size 172e-6 m x 172e-6 m
        # Silicon sensor, thickness 0.000320 m
        # Exposure_time 0.995000 s
        # Exposure_period 1.000000 s
        # Tau = 194.0e-09 s
        # Count_cutoff 1048575 counts
        # Threshold_setting 5000 eV
        # Wavelength 1.2398 A
        # Energy_range (0, 0) eV
        # Detector_distance 0.15500 m
        # Detector_Voffset -0.01003 m
        # Beam_xy (1231.00, 1277.00) pixels
        # Flux 22487563295 ph/s
        # Filter_transmission 0.0008
        # Start_angle 13.0000 deg.
        # Angle_increment 1.0000 deg.
        # Detector_2theta 0.0000 deg.
        # Polarization 0.990
        # Alpha 0.0000 deg.
        # Kappa 0.0000 deg.
        # Phi 0.0000 deg.
        # Chi 0.0000 deg.
        # Oscillation_axis  X, CW
        # N_oscillations 1
        ;

        _array_data.data
        ;
        --CIF-BINARY-FORMAT-SECTION--
        Content-Type: application/octet-stream;
             conversions="x-CBF_BYTE_OFFSET"
        Content-Transfer-Encoding: BINARY
        X-Binary-Size: 6247567
        X-Binary-ID: 1
        X-Binary-Element-Type: "signed 32-bit integer"
        X-Binary-Element-Byte-Order: LITTLE_ENDIAN
        Content-MD5: 8wO6i2+899lf5iO8QPdgrw==
        X-Binary-Number-of-Elements: 6224001
        X-Binary-Size-Fastest-Dimension: 2463
        X-Binary-Size-Second-Dimension: 2527
        X-Binary-Size-Padding: 4095

        ...
       
        --CIF-BINARY-FORMAT-SECTION----
        ;
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

save_


save__array_data.array_id
    _item_description.description
;             This item is a pointer to _array_structure.id in the
              ARRAY_STRUCTURE category.
             
              If not given, it defaults to 1.
             
;
    _item.name                  '_array_data.array_id'
    _item.category_id             array_data
    _item.mandatory_code          implicit
    _item_default.value           1
    _item_type.code               code
     save_


save__array_data.binary_id
    _item_description.description
;             This item is an integer identifier which, along with
              _array_data.array_id, should uniquely identify the
              particular block of array data.

              If _array_data.binary_id is not explicitly given,
              it defaults to 1.

              The value of _array_data.binary_id distinguishes
              among multiple sets of data with the same array
              structure.

              If the MIME header of the data array specifies a
              value for X-Binary-ID, the value of  _array_data.binary_id
              should be equal to the value given for X-Binary-ID.
;
     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
             '_array_data.binary_id'            array_data
                                                                implicit
             '_diffrn_data_frame.binary_id'     diffrn_data_frame
                                                                implicit
             '_array_intensities.binary_id'     array_intensities
                                                                implicit
     loop_
    _item_linked.child_name
    _item_linked.parent_name
             '_diffrn_data_frame.binary_id'     '_array_data.binary_id'
             '_array_intensities.binary_id'     '_array_data.binary_id'

    _item_default.value           1
    _item_type.code               int
     loop_
    _item_range.maximum
    _item_range.minimum
                            1  1
                            .  1
     save_


save__array_data.data
    _item_description.description
;             The value of _array_data.data contains the array data
              encapsulated in a STAR string.

              The representation used is a variant on the
              Multipurpose Internet Mail Extensions (MIME) specified
              in RFC 2045-2049 by N. Freed et al.  The boundary
              delimiter used in writing an imgCIF or CBF is
              '\n--CIF-BINARY-FORMAT-SECTION--' (including the
              required initial '\n--').

              The Content-Type may be any of the discrete types permitted
              in RFC 2045; 'application/octet-stream' is recommended
              for diffraction images in the ARRAY_DATA category.
              Note:  When appropriate in other categories, e.g. for
              photographs of crystals, more precise types, such as
              'image/jpeg', 'image/tiff', 'image/png', etc. should be used.
             
              If an octet stream was compressed, the compression should
              be specified by the parameter
                'conversions="X-CBF_PACKED"'
              or the parameter
                'conversions="X-CBF_CANONICAL"'
              or the parameter
                'conversions="X-CBF_BYTE_OFFSET"'
              or the parameter
                'conversions="X-CBF_BACKGROUND_OFFSET_DELTA"'
               
              If the parameter
                'conversions="X-CBF_PACKED"'
              is given it may be further modified with the parameters
                '"uncorrelated_sections"'
              or
                '"flat"'
             
              If the '"uncorrelated_sections"' parameter is
              given, each section will be compressed without using
              the prior section for averaging.
             
              If the '"flat"' parameter is given, each the
              image will be treated as one long row.
             
              Note that the X-CBF_CANONICAL and X-CBF_PACKED are
              slower but more efficient compressions that the others.
              The X-CBF_BYTE_OFFSET compression is a good compromise
              between speed and efficiency for ordinary diffraction
              images.  The X-CBF_BACKGROUND_OFFSET_DELTA compression
              is oriented towards sparse data, such as masks and
              tables of replacement pixel values for images with
              overloaded spots.

              The Content-Transfer-Encoding may be 'BASE64',
              'Quoted-Printable', 'X-BASE8', 'X-BASE10',
              'X-BASE16' or 'X-BASE32K', for an imgCIF or 'BINARY'
              for a CBF.  The octal, decimal and hexadecimal transfer
              encodings are provided for convenience in debugging and
              are not recommended for archiving and data interchange.

              In a CIF, one of the parameters 'charset=us-ascii',
              'charset=utf-8' or 'charset=utf-16' may be used on the
              Content-Transfer-Encoding to specify the character set
              used for the external presentation of the encoded data.
              If no charset parameter is given, the character set of
              the enclosing CIF is assumed.  In any case, if a BOM
              flag is detected (FE FF for big-endian UTF-16, FF FE for
              little-endian UTF-16 or EF BB BF for UTF-8) is detected,
              the indicated charset will be assumed until the end of the
              encoded data or the detection of a different BOM.  The
              charset of the Content-Transfer-Encoding is not the character
              set of the encoded data, only the character set of the
              presentation of the encoded data and should be respecified
              for each distinct STAR string.

              In an imgCIF file, the encoded binary data begins after
              the empty line terminating the header.  In an imgCIF file,
              the encoded binary data ends with the terminating boundary
              delimiter '\n--CIF-BINARY-FORMAT-SECTION----'
              in the currently effective charset or with the '\n; '
              that terminates the STAR string.

              In a CBF, the raw binary data begins after an empty line
              terminating the header and after the sequence:

              Octet   Hex   Decimal  Purpose
                0     0C       12    (ctrl-L) Page break
                1     1A       26    (ctrl-Z) Stop listings in MS-DOS
                2     04       04    (Ctrl-D) Stop listings in UNIX
                3     D5      213    Binary section begins

              None of these octets are included in the calculation of
              the message size or in the calculation of the
              message digest.

              The X-Binary-Size header specifies the size of the
              equivalent binary data in octets.  If compression was
              used, this size is the size after compression, including
              any book-keeping fields.  An adjustment is made for
              the deprecated binary formats in which eight bytes of binary
              header are used for the compression type.  In this case,
              the eight bytes used for the compression type are subtracted
              from the size, so that the same size will be reported
              if the compression type is supplied in the MIME header.
              Use of the MIME header is the recommended way to
              supply the compression type.  In general, no portion of
              the  binary header is included in the calculation of the size.

              The X-Binary-Element-Type header specifies the type of
              binary data in the octets, using the same descriptive
              phrases as in _array_structure.encoding_type.  The default
              value is 'unsigned 32-bit integer'.

              An MD5 message digest may, optionally, be used. The 'RSA Data
              Security, Inc. MD5 Message-Digest Algorithm' should be used.
              No portion of the header is included in the calculation of the
              message digest.

              If the Transfer Encoding is 'X-BASE8', 'X-BASE10' or
              'X-BASE16', the data are presented as octal, decimal or
              hexadecimal data organized into lines or words.  Each word
              is created by composing octets of data in fixed groups of
              2, 3, 4, 6 or 8 octets, either in the order ...4321 ('big-
              endian') or 1234... ('little-endian').  If there are fewer
              than the specified number of octets to fill the last word,
              then the missing octets are presented as '==' for each
              missing octet.  Exactly two equal signs are used for each
              missing octet even for octal and decimal encoding.
              The format of lines is:

              rnd xxxxxx xxxxxx xxxxxx

              where r is 'H', 'O' or 'D' for hexadecimal, octal or
              decimal, n is the number of octets per word and d is '<'
              or '>' for the '...4321' and '1234...' octet orderings,
              respectively.  The '==' padding for the last word should
              be on the appropriate side to correspond to the missing
              octets, e.g.

              H4< FFFFFFFF FFFFFFFF 07FFFFFF ====0000

              or

              H3> FF0700 00====

              For these hexadecimal, octal and decimal formats only,
              comments beginning with '#' are permitted to improve
              readability.

              BASE64 encoding follows MIME conventions.  Octets are
              in groups of three: c1, c2, c3.  The resulting 24 bits
              are broken into four six-bit quantities, starting with
              the high-order six bits (c1 >> 2) of the first octet, then
              the low-order two bits of the first octet followed by the
              high-order four bits of the second octet [(c1 & 3)<<4 | (c2>>4)],
              then the bottom four bits of the second octet followed by the
              high-order two bits of the last octet [(c2 & 15)<<2 | (c3>>6)],
              then the bottom six bits of the last octet (c3 & 63).  Each
              of these four quantities is translated into an ASCII character
              using the mapping:

                        1         2         3         4         5         6
              0123456789012345678901234567890123456789012345678901234567890123
              |         |         |         |         |         |         |
              ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/

              With short groups of octets padded on the right with one '='
              if c3 is missing, and with '==' if both c2 and c3 are missing.

              X-BASE32K encoding is similar to BASE64 encoding, except that
              sets of 15 octets are encoded as sets of 8 16-bit unicode
              characters, by breaking the 120 bits into 8 15-bit quantities.
              256 is added to each 15 bit quantity to bring it into a
              printable uncode range.  When encoding, zero padding is used
              to fill out the last 15 bit quantity.  If 8 or more bits of
              padding are used, a single equals sign (hexadecimal 003D) is
              appended.  Embedded whitespace and newlines are introduced
              to produce lines of no more than 80 characters each.  On
              decoding, all printable ascii characters and ascii whitespace
              characters are ignored except for any trailing equals signs.
              The number of trailing equals signs indicated the number of
              trailing octets to be trimmed from the end of the decoded data.
              (see Georgi Darakev, Vassil Litchev, Kostadin Z. Mitev, Herbert
              J. Bernstein, 'Efficient Support of Binary Data in the XML
              Implementation of the NeXus File Format',absract W0165,
              ACA Summer Meeting, Honolulu, HI, July 2006).

              QUOTED-PRINTABLE encoding also follows MIME conventions, copying
              octets without translation if their ASCII values are 32...38,
              42, 48...57, 59, 60, 62, 64...126 and the octet is not a ';'
              in column 1.  All other characters are translated to =nn, where
              nn is the hexadecimal encoding of the octet.  All lines are
              'wrapped' with a terminating '=' (i.e. the MIME conventions
              for an implicit line terminator are never used).
             
              The "X-Binary-Element-Byte-Order" can specify either
              '"BIG_ENDIAN"' or '"LITTLE_ENDIAN"' byte order of the imaage
              data.  Only LITTLE_ENDIAN is recommended.  Processors
              may treat BIG_ENDIAN as a warning of data that can
              only be processed by special software.

              The "X-Binary-Number-of-Elements" specifies the number of
              elements (not the number of octets) in the decompressed, decoded
              image.

              The optional "X-Binary-Size-Fastest-Dimension" specifies the
              number of elements (not the number of octets) in one row of the
              fastest changing dimension of the binary data array. This
              information must be in the MIME header for proper operation of
              some of the decompression algorithms.

              The optional "X-Binary-Size-Second-Dimension" specifies the
              number of elements (not the number of octets) in one column of
              the second-fastest changing dimension of the binary data array.
              This information must be in the MIME header for proper operation
              of some of the decompression algorithms.

              The optional "X-Binary-Size-Third-Dimension" specifies the
              number of sections for the third-fastest changing dimension of
              the binary data array.
             
              The optional "X-Binary-Size-Padding" specifies the size in
              octets of an optional padding after the binary array data and
              before the closing flags for a binary section.
;
    _item.name                  '_array_data.data'
    _item.category_id             array_data
    _item.mandatory_code          yes
    _item_type.code               binary
save_


save__array_data.header_contents
    _item_description.description
;             This item is an text field for use in minimal CBF files to carry
              essential header information to be kept with image data
              in _array_data.data when the tags that normally carry the
              structured metadata for the image have not been populated.
             
              Normally this data item should not appear when the full set
              of tags have been populated and _diffrn_data_frame.details
              appears.
;
    _item.name                  '_array_data.header_contents'
    _item.category_id            array_data
    _item.mandatory_code         no
    _item_type.code              text
     save_



save__array_data.header_convention
    _item_description.description
;             This item is an identifier for the convention followed in
              constructing the contents of _array_data.header_contents
             
              The permitted values are of an image creator identifier
              followed by an underscore and a version string.  To avoid
              confusion about conventions, all creator identifiers
              should be registered with the IUCr and the conventions
              for all identifiers and versions should be posted on
              the MEDSBIO.org web site.
;
    _item.name                  '_array_data.header_convention'
    _item.category_id            array_data
    _item.mandatory_code         no
    _item_type.code              code
     save_

save__array_data.variant
    _item_description.description
;             The value of _array_data.variant gives the variant
              to which the given ARRAY_DATA row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.

              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_array_data.variant'
    _item.category_id             array_data
    _item.mandatory_code          implicit
    _item_type.code               code
     save_



######################
# ARRAY_ELEMENT_SIZE #
######################


save_array_element_size
    _category.description
;    Data items in the ARRAY_ELEMENT_SIZE category record the physical
     size of array elements along each array dimension.
;
    _category.id                   array_element_size
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _array_element_size.array_id ARRAYID
    _array_element_size.index INDEX   (See _array_element_size.array_id)
    _array_element_size.size SIZE
   
    -->
   
    /entry:NXentry
     /instrument:NXinstrument
       /DETECTORNAME:NXdetector_group
       /DETECTORELEMENTNAME:NXdetector
          /data_ARRAYID_BINARYID -->
                /entry/data_ARRAYID_BINARYID/data_ARRAYID_BINARYID
          /?_pixel_size_ARRAYID=SIZE
            @CBF_array_id="ARRAYID"
    where "?" is "x", "y", "z" for
    _array_element_size.index == 1,2, or 3 respectively
             
;

     loop_
    _category_key.name             '_array_element_size.array_id'
                                   '_array_element_size.index'
                                   '_array_element_size.variant'
     loop_
    _category_group.id             'inclusive_group'
                                   'array_data_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;       Example 1 - A regular 2D array with a uniform element dimension
                    of 1220 nanometres.
;
;
        loop_
       _array_element_size.array_id
       _array_element_size.index
       _array_element_size.size
        image_1   1    1.22e-6
        image_1   2    1.22e-6
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

     save_


save__array_element_size.array_id
    _item_description.description
;             This item is a pointer to _array_structure.id in the
              ARRAY_STRUCTURE category.
;
    _item.name                  '_array_element_size.array_id'
    _item.category_id             array_element_size
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


save__array_element_size.index
    _item_description.description
;             This item is a pointer to _array_structure_list.index in
              the ARRAY_STRUCTURE_LIST category.
;
    _item.name                  '_array_element_size.index'
    _item.category_id             array_element_size
    _item.mandatory_code          yes
    _item_type.code               int
     save_


save__array_element_size.size
    _item_description.description
;              The size in metres of an image element in this
               dimension. This supposes that the elements are arranged
               on a regular grid.
;
    _item.name               '_array_element_size.size'
    _item.category_id          array_element_size
    _item.mandatory_code       yes
    _item_type.code            float
    _item_units.code           'metres'
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0.0
     save_

save__array_element_size.variant
    _item_description.description
;             The value of _array_element_size.variant gives the variant
              to which the given ARRAY_ELEMENT_SIZE row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.

              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_array_element_size.variant'
    _item.category_id             array_element_size
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


#####################
# ARRAY_INTENSITIES #
#####################


save_array_intensities
    _category.description
;             Data items in the ARRAY_INTENSITIES category record the
              information required to recover the intensity data from
              the set of data values stored in the ARRAY_DATA category.

              The detector may have a complex relationship
              between the raw intensity values and the number of
              incident photons.  In most cases, the number stored
              in the final array will have a simple linear relationship
              to the actual number of incident photons, given by
              _array_intensities.gain.  If raw, uncorrected values
              are presented (e.g. for calibration experiments), the
              value of _array_intensities.linearity will be 'raw'
              and _array_intensities.gain will not be used.

;
    _category.id                   array_intensities
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _array_intensities.array_id ARRAYID
    _array_intensities.binary_id BINARYID
    _array_intensities.details DETAILS
    _array_intensities.gain GAIN
    _array_intensities.gain_esd GAINESD
    _array_intensities.linearity LINEARITY
    _array_intensities.offset OFFSET
    _array_intensities.scaling SCALING
    _array_intensities.overload OVERLOAD
    _array_intensities.undefined_value UNDEFVAL
    _array_intensities.underload UNDERLOAD
    _array_intensities.pixel_fast_bin_size FBINSIZE
    _array_intensities.pixel_slow_bin_size SBINSIZE
    _array_intensities.pixel_binning_method METHOD


    -->

      /entry:NXentry
        /data_ARRAYID_BINARYID:NXdata
          /data_ARRAYID_BINARYID
              @CBF_array_id="ARRAYID"
              @CBF_binary_id="BINARYID"
              @details="DETAILS"
              @gain=[GAIN]         
              @gain_esd=[GAINESD]
              @linearity="LINEARITY"         
              @offset=[OFFSET]
              @saturation_value=[OVERLOAD]
              @scaling_factor=[SCALING]
              @undefined_value=[UNDEFVAL]
              @underload_value=[UNDERLOAD]
              @CBF_array_intensities__pixel_fast_bin_size=[FBINSIZE]
              @CBF_array_intensities__pixel_slow_bin_size=[SBINSIZE]
              @CBF_array_intensities__pixel_binning_method="METHOD"
       /instrument:NXinstrument
         /DETECTORNAME:NXdetector_group
         /DETECTORELEMENTNAME:NXdetector
           /data_ARRAYID_BINARYID -->
                /entry/data_ARRAYID_BINARYID/data_ARRAYID_BINARYID
   
    The argument has been made that these attributes are not needed
    because NeXus files are supposed to have "true values" stored.
    In many cases that is true and then none of these attributes
    are needed.  However, with some detectors and some experiments
    there are good technical and scientific reasons to bring in values
    that will need processing later to derive "true values", and in
    those case some or all of these attributes will be needed.  They
    are provided for such cases.
   
    The same attributes could be used as fields in the case of a single
    data array, but in that case links for all the fields would be needed
    from NXdata to NXdetector, so it is preferable to use attributes even
    in the case of a single data array.  The reverse mapping will support
    both uses.

   
;

     loop_
    _category_key.name             '_array_intensities.array_id'
                                   '_array_intensities.binary_id'
                                   '_array_intensities.variant'
     loop_
    _category_group.id             'inclusive_group'
                                   'array_data_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;
        Example 1
;
;
        loop_
        _array_intensities.array_id
        _array_intensities.linearity
        _array_intensities.gain
        _array_intensities.overload
        _array_intensities.undefined_value
        _array_intensities.pixel_fast_bin_size
        _array_intensities.pixel_slow_bin_size
        _array_intensities.pixel_binning_method
        image_1   linear  1.2    655535   0   2   2    hardware
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
   
     save_


save__array_intensities.array_id
    _item_description.description
;             This item is a pointer to _array_structure.id in the
              ARRAY_STRUCTURE category.
;
    _item.name                  '_array_intensities.array_id'
    _item.category_id             array_intensities
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


save__array_intensities.binary_id
    _item_description.description
;             This item is a pointer to _array_data.binary_id in the
              ARRAY_DATA category.
;
    _item.name                  '_array_intensities.binary_id'
    _item.category_id             array_intensities
    _item.mandatory_code          implicit
    _item_type.code               int
     save_

save__array_intensities.details
    _item_description.description
;              A description of special aspects of the calculation of array
               intensities.
;
    _item.name                  '_array_intensities.details'
    _item.category_id             array_intensities
    _item.mandatory_code          no
    _item_type.code                   text
    _item_examples.case         'Gain_setting: low gain (vrf = -0.300)'
   
     save_


save__array_intensities.gain
    _item_description.description
;              Detector 'gain'. The factor by which linearized
               intensity count values should be divided to produce
               true photon counts.
;
    _item.name              '_array_intensities.gain'
    _item.category_id          array_intensities
    _item.mandatory_code       yes
    _item_type.code            float
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0.0
    _item_units.code           'counts_per_photon'
     loop_
    _item_related.related_name
    _item_related.function_code  '_array_intensities.gain_esd'
                                 'associated_value'
     save_


save__array_intensities.gain_esd
    _item_description.description
;            The estimated standard deviation of detector 'gain'.
;
    _item.name              '_array_intensities.gain_esd'
    _item.category_id          array_intensities
    _item.mandatory_code       yes
    _item_type.code            float
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0.0

    _item_units.code          'counts_per_photon'
     loop_
    _item_related.related_name
    _item_related.function_code  '_array_intensities.gain'
                                 'associated_esd'
     save_


save__array_intensities.linearity
    _item_description.description
;              The intensity linearity scaling method used to convert
               from the raw intensity to the stored element value:

               'linear' is linear.

               'offset'  means that the value defined by
               _array_intensities.offset should be added to each
                element value.

               'scaling' means that the value defined by
               _array_intensities.scaling should be multiplied with each
               element value.

               'scaling_offset' is the combination of the two previous cases,
               with the scale factor applied before the offset value.

               'sqrt_scaled' means that the square root of raw
               intensities multiplied by _array_intensities.scaling is
               calculated and stored, perhaps rounded to the nearest
               integer. Thus, linearization involves dividing the stored
               values by _array_intensities.scaling and squaring the
               result.

               'logarithmic_scaled' means that the logarithm base 10 of
               raw intensities multiplied by _array_intensities.scaling
               is calculated and stored, perhaps rounded to the nearest
               integer. Thus, linearization involves dividing the stored
               values by _array_intensities.scaling and calculating 10
               to the power of this number.

               'raw' means that the data are a set of raw values straight
               from the detector.
;

    _item.name               '_array_intensities.linearity'
    _item.category_id          array_intensities
    _item.mandatory_code       yes
    _item_type.code            code
     loop_
    _item_enumeration.value
    _item_enumeration.detail
                              'linear' .
                              'offset'
;              The value defined by  _array_intensities.offset should
               be added to each element value.
;
                              'scaling'
;              The value defined by _array_intensities.scaling should be
               multiplied with each element value.
;
                              'scaling_offset'
;              The combination of the scaling and offset
               with the scale factor applied before the offset value.
;
                              'sqrt_scaled'
;              The square root of raw intensities multiplied by
               _array_intensities.scaling is calculated and stored,
               perhaps rounded to the nearest integer. Thus,
               linearization involves dividing the stored
               values by _array_intensities.scaling and squaring the
               result.
;
                              'logarithmic_scaled'
;              The logarithm base 10 of raw intensities multiplied by
               _array_intensities.scaling  is calculated and stored,
               perhaps rounded to the nearest integer. Thus,
               linearization involves dividing the stored values by
               _array_intensities.scaling and calculating 10 to the
               power of this number.
;
                              'raw'
;              The array consists of raw values to which no corrections have
               been applied.  While the handling of the data is similar to
               that given for 'linear' data with no offset, the meaning of
               the data differs in that the number of incident photons is
               not necessarily linearly related to the number of counts
               reported.  This value is intended for use either in
               calibration experiments or to allow for handling more
               complex data-fitting algorithms than are allowed for by
               this data item.
;
     save_


save__array_intensities.offset
    _item_description.description
;              Offset value to add to array element values in the manner
               described by the item _array_intensities.linearity.
;
    _item.name                 '_array_intensities.offset'
    _item.category_id          array_intensities
    _item.mandatory_code       no
    _item_type.code            float
     save_


save__array_intensities.overload
    _item_description.description
;              The saturation intensity level for this data array, i.e. the
               value above which correct intensities may not be recorded.

               The valid pixel values are those less than _array_intensities.overload
               and greater than or equal to _array_intensities.underload
;
    _item.name                 '_array_intensities.overload'
    _item.category_id          array_intensities
    _item.mandatory_code       no
    _item_type.code            float
    _item_units.code          'counts'
     save_

save__array_intensities.pixel_fast_bin_size
    _item_description.description
;              The value of _array_intensities.pixel_fast_bin_size specifies
               the number of pixels that compose one element in the direction
               of the most rapidly varying array dimension.

               Typical values are 1, 2, 4 or 8.  When there is 1 pixel per
               array element in both directions, the value given for
               _array_intensities.pixel_binning_method normally should be
               'none'.

               It is specified as a float to allow for binning algorithms that
               create array elements that are not integer multiples of the
               detector pixel size.
;
    _item.name              '_array_intensities.pixel_fast_bin_size'
    _item.category_id          array_intensities
    _item.mandatory_code       implicit
    _item_type.code            float
    _item_default.value        1.
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0.0
    _item_units.code           'pixels_per_element'
     save_

save__array_intensities.pixel_slow_bin_size
    _item_description.description
;              The value of _array_intensities.pixel_slow_bin_size specifies
               the number of pixels that compose one element in the direction
               of the second most rapidly varying array dimension.

               Typical values are 1, 2, 4 or 8.  When there is 1 pixel per
               array element in both directions, the value given for
               _array_intensities.pixel_binning_method normally should be
               'none'.

               It is specified as a float to allow for binning algorithms that
               create array elements that are not integer multiples of the
               detector pixel size.
;
    _item.name              '_array_intensities.pixel_slow_bin_size'
    _item.category_id          array_intensities
    _item.mandatory_code       implicit
    _item_type.code            float
    _item_default.value        1.
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0.0
    _item_units.code           'pixels_per_element'
     save_

save__array_intensities.pixel_binning_method
    _item_description.description
;              The value of _array_intensities.pixel_binning_method specifies
               the method used to derive array elements from multiple pixels.
;
    _item.name              '_array_intensities.pixel_binning_method'
    _item.category_id          array_intensities
    _item.mandatory_code       implicit
    _item_type.code            code
     loop_
    _item_enumeration.value
    _item_enumeration.detail
                               'hardware'
;              The element intensities were derived from the raw data of one
               or more pixels by used of hardware in the detector, e.g. by use
               of shift registers in a CCD to combine pixels into super-pixels.
;
                               'software'
;              The element intensities were derived from the raw data of more
               than one pixel by use of software.
;
                               'combined'
;              The element intensities were derived from the raw data of more
               than one pixel by use of both hardware and software, as when
               hardware binning is used in one direction and software in the
               other.
;
                               'none'
;              In the both directions, the data has not been binned.  The
               number of pixels is equal to the number of elements.

               When the value of _array_intensities.pixel_binning_method is
               'none' the values of _array_intensities.pixel_fast_bin_size
               and _array_intensities.pixel_slow_bin_size both must be 1.
;
                               'unspecified'
;              The method used to derive element intensities is not specified.
;
    _item_default.value        'unspecified'
     save_

save__array_intensities.scaling
    _item_description.description
;              Multiplicative scaling value to be applied to array data
               in the manner described by item
               _array_intensities.linearity.
;
    _item.name                 '_array_intensities.scaling'
    _item.category_id          array_intensities
    _item.mandatory_code       no
    _item_type.code            float
      save_


save__array_intensities.undefined_value
    _item_description.description
;              A value to be substituted for undefined values in
               the data array.
;
    _item.name                 '_array_intensities.undefined_value'
    _item.category_id          array_intensities
    _item.mandatory_code       no
    _item_type.code            float
     save_

save__array_intensities.underload
    _item_description.description
;              The lowest value at which pixels for this detector would
               reasonably be measured. 
               The valid pixel values are those less than _array_intensities.overload
               and greater than or equal to _array_intensities.underload

;
    _item.name                 '_array_intensities.underload'
    _item.category_id          array_intensities
    _item.mandatory_code       no
    _item_type.code            float
    _item_units.code          'counts'
     save_   
  
save__array_intensities.variant
    _item_description.description
;             The value of _array_intensities.variant gives the variant
              to which the given ARRAY_INTENSITIES row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_array_intensities.variant'
    _item.category_id             array_intensities
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


###################
# ARRAY_STRUCTURE #
###################


save_array_structure
    _category.description
;    Data items in the ARRAY_STRUCTURE category record the organization and
     encoding of array data that may be stored in the ARRAY_DATA category.
;
    _category.id                   array_structure
    _category.mandatory_code       no
    _category.NX_mapping_details
;
    Note that this is essentially a type that may apply to multiple
    binary images, and corresponds to some of the detailed HDF5
    information about an array.   The following mapping is a placeholder
    for the names given for future reference, if needed.

    The information in this category is the byte order, the compression
    information, and the encoding, which is carried in and retrievable
    from the HDF5 types, properties lists, etc. 

    At present NeXus does not expose this information.  This should be
    discussed.

;

     loop_
    _category_key.name             '_array_structure.id'
                                   '_array_structure.variant'
     loop_
    _category_group.id             'inclusive_group'
                                   'array_data_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;   Example 1 -
;
;
     loop_
    _array_structure.id
    _array_structure.encoding_type
    _array_structure.compression_type
    _array_structure.byte_order
     image_1       "unsigned 16-bit integer"  none  little_endian
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

     save_


save__array_structure.byte_order
    _item_description.description
;              The order of bytes for integer values which require more
               than 1 byte.

               (IBM-PC's and compatibles and DEC VAXs use low-byte-first
               ordered integers, whereas Hewlett Packard 700
               series, Sun-4 and Silicon Graphics use high-byte-first
               ordered integers.  DEC Alphas can produce/use either
               depending on a compiler switch.)
;

    _item.name                     '_array_structure.byte_order'
    _item.category_id               array_structure
    _item.mandatory_code            yes
    _item_type.code                 ucode
     loop_
    _item_enumeration.value
    _item_enumeration.detail
                                   'big_endian'
;       The first byte in the byte stream of the bytes which make up an
        integer value is the most significant byte of an integer.
;
                                   'little_endian'
;       The last byte in the byte stream of the bytes which make up an
        integer value is the most significant byte of an integer.
;
     save_


save__array_structure.compression_type
    _item_description.description
;             Type of data-compression method used to compress the array
              data.
;
    _item.name                   '_array_structure.compression_type'
    _item.category_id             array_structure
    _item.mandatory_code          no
    _item_type.code               ucode
    _item_default.value           'none'
     loop_
    _item_enumeration.value
    _item_enumeration.detail
                                  'byte_offset'
;       Using the 'byte_offset' compression scheme as per A. Hammersley
        and the CBFlib manual, section 3.3.3
;
                                  'canonical'
;       Using the 'canonical' compression scheme (International Tables
        for Crystallography Volume G, Section 5.6.3.1) and CBFlib
        manual section 3.3.1
;
                                  'nibble_offset'
;       Using the 'nibble_offset' compression scheme as per H. Bernstein
        and the CBFlib manual, section 3.3.4
;
                                  'none'
;       Data are stored in normal format as defined by
        _array_structure.encoding_type and
        _array_structure.byte_order.
;
                                  'packed'
;       Using the 'packed' compression scheme, a CCP4-style packing
        as per J. P. Abrahams pack_c.c and CBFlib manual, section 3.3.2.
;
                                  'packed_v2'
;       Using the 'packed' compression scheme, version 2, as per
        J. P. Abrahams pack_c.c and CBFlib manual, section 3.3.2.
;
     save_

save__array_structure.compression_type_flag
    _item_description.description
;             Flags modifying the type of data-compression method used to
              compress the arraydata.
;
    _item.name                   '_array_structure.compression_type_flag'
    _item.category_id             array_structure
    _item.mandatory_code          no
    _item_type.code               ucode
     loop_
    _item_enumeration.value
    _item_enumeration.detail
                                  'uncorrelated_sections'
;       When applying packed or packed_v2 compression on an array with
        uncorrelated sections, do not average in points from the prior
        section.
;
                                  'flat'
;       When applying packed or packed_v2 compression on an array with
        treat the entire image as a single line set the maximum number
        of bits for an offset to 65 bits.
       
        The flag is included for compatibility with software prior to
        CBFlib_0.7.7, and should not be used for new data sets.

;

     save_

save__array_structure.encoding_type
    _item_description.description
;              Data encoding of a single element of array data.

               The type 'unsigned 1-bit integer' is used for
               packed Booleans arrays for masks.  Each element
               of the array corresponds to a single bit
               packed in unsigned 8-bit data.
              
               In several cases, the IEEE format is referenced.
               See IEEE Standard 754-1985 (IEEE, 1985).

               Ref: IEEE (1985). IEEE Standard for Binary Floating-Point
               Arithmetic. ANSI/IEEE Std 754-1985. New York: Institute of
               Electrical and Electronics Engineers.
;

    _item.name                '_array_structure.encoding_type'
    _item.category_id          array_structure
    _item.mandatory_code       yes
    _item_type.code            uline
     loop_
    _item_enumeration.value
                              'unsigned 1-bit integer'
                              'unsigned 8-bit integer'
                              'signed 8-bit integer'
                              'unsigned 16-bit integer'
                              'signed 16-bit integer'
                              'unsigned 32-bit integer'
                              'signed 32-bit integer'
                              'signed 32-bit real IEEE'
                              'signed 64-bit real IEEE'
                              'signed 32-bit complex IEEE'
     save_


save__array_structure.id
    _item_description.description
;             The value of _array_structure.id must uniquely identify
              each item of array data.             

              This item has been made implicit and given a default value of 1
              as a convenience in writing miniCBF files.  Normally an
              explicit name with useful content should be used.
;

     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
             '_array_structure.id'              array_structure      implicit
             '_array_data.array_id'             array_data           implicit
             '_array_structure_list.array_id'   array_structure_list implicit
             '_array_structure_list_section.array_id'
                                        array_structure_list_section implicit
             '_array_intensities.array_id'      array_intensities    implicit
             '_diffrn_data_frame.array_id'      diffrn_data_frame    implicit


    _item_default.value           1
    _item_type.code               code
     loop_
    _item_linked.child_name
    _item_linked.parent_name
             '_array_data.array_id'
                      '_array_structure.id'
             '_array_structure_list.array_id'
                      '_array_structure.id'
             '_array_structure_list_section.array_id'
                      '_array_structure.id'
             '_array_intensities.array_id'
                      '_array_structure.id'
             '_diffrn_data_frame.array_id'
                      '_array_structure.id'

     save_

save__array_structure.variant
    _item_description.description
;             The value of _array_structure.variant gives the variant
              to which the given ARRAY_STRUCTURE row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_array_structure.variant'
    _item.category_id             array_structure
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


########################
# ARRAY_STRUCTURE_LIST #
########################


save_array_structure_list
    _category.description
;    Data items in the ARRAY_STRUCTURE_LIST category record the size
     and organization of each array dimension.

     The relationship to physical axes may be given.
;
    _category.id                   array_structure_list
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _array_structure_list.axis_set_id AXISSETID
    _array_structure_list.array_id ARRAYID
    _array_structure_list.array_section_id ARRAYSECTIONID
    _array_structure_list.dimension DIM
    _array_structure_list.direction DIR
    _array_structure_list.index INDEX
    _array_structure_list.precedence PRECEDENCE
   
    _array_structure_list_section.array_id ARRAYID -->
    _array_structure_list_section.id ARRAYSECTIONID -->
    _array_structure_list_section.index PRECEDENCE-->
    _array_structure_list_section.end END -->
    _array_structure_list_section.start START -->
    _array_structure_list_section.stride STRIDE -->

   
    loop_
    _array_structure_list_axis.axis_id
    _array_structure_list_axis.axis_set_id
    _array_structure_list_axis.angle
    _array_structure_list_axis.angle_increment
    _array_structure_list_axis.displacement
    _array_structure_list_axis.fract_displacement 
    _array_structure_list_axis.displacement_increment
    _array_structure_list_axis.fract_displacement_increment
    _array_structure_list_axis.angular_pitch 
    _array_structure_list_axis.reference_angle
    _array_structure_list_axis.reference_displacement REFDISP
    AXISID1 AXISSETID ANGLE1 ANGLEINC1 DISP1 FRACTDISP1
         DISPINC1 FRACTINC1 ANGPITCH1 REFANG1
    AXISID2 AXISSETID ANGLE2 ANGLEINC2 DISP2 FRACTDISP2
         DISPINC2 FRACTINC2 ANGPITCH2 REFANG2
    AXISID3 AXISSETID ANGLE3 ANGLEINC3 DISP3 FRACTDISP3
         DISPINC3 FRACTINC3 ANGPITCH3 REFANG3
   
    _diffrn_data_frame.array_id ARRAYID
    _diffrn_data_frame.binary_id BINARYID
    _diffrn_data_frame.center_fast CENF
    _diffrn_data_frame.center_slow CENS
    _diffrn_data_frame.center_derived CENDERIVED
    _diffrn_data_frame.center_units UNITS
    _diffrn_data_frame.detector_element_id ELEMENTID
    _diffrn_data_frame.id FRAMEID
    _diffrn_data_frame.details DETAILS

    -->
   
    ...
   
   
   /entry:NXentry
     /data_ARRAYID_BINARYID:NXdata
        @signal="data_ARRAYID_BINARY_ID"
        /data_ARRAYID_BINARYID[ the data for the array ARRAYID,
                                binary BINARYID, all sections,
                                all FRAMES]
        @axes=[...,AXISID1,...] with AXISID1 inserted at PRECEDENCE-1
        @AXISID1_indices=[PRECEDENCE-1]
        @AXISID2_indices=[PRECEDENCE-1]
        @AXISID3_indices=[PRECEDENCE-1]
        @AXISID1_origins=[origin1]  (default 0)
        @AXISID2_origins=[origin2]  (default 0)
        @AXISID3_origins=[origin3]  (default 0)
        @AXISID1_sizes=[size1]
        @AXISID2_sizes=[size2]
        @AXISID3_sizes=[size3]
        @AXISID1_strides=[stride1]
        @AXISID2_strides=[stride2]
        @AXISID3_strides=[stride3]
   
        ...
        /AXISID1 -->
            /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID1
        /AXISID2 -->
            /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID2
        /AXISID2 -->
            /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID3
        ...
       
     /instrument:NXinstrument
       /DETECTORNAME:NXdetector_group
       /DETECTORELEMENTNAME:NXdetector
           /data_ARRAYID_BINARYID -->
                /entry/data_ARRAYID_BINARYID/data_ARRAYID_BINARYID
           /AXISID1 -->
                /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID1
           /AXISID2 -->
                /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID2
           /AXISID2 -->
                /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID3
           /ARRAYSECTIONID:NXdetector_module
             /data_origin=[...] -- the 0-based origins indices of ARRAYSECTIONID
             /data_size=[...] the sizes in pixels of ARRAYSECTIONID
             /data_stride[...] the strides of ARRAYSECTIONID
               ..
           /transformations:NXtransformations
             /AXISID1=[DISP1,DISP1+DISPINC1,...]  
                  (or using angles where appropriate)
                @depends_on=...   determined from AXIS definitions
                @equipment="detector"
                @offset=[...] determined from AXIS definitions
                @offset_units="mm"
                @transformation_type="..." from AXIS definitions
                @units="mm"
                @vector=[...] determined from AXIS definitions
                @CBF_array_structure_list_axis__axis_id="AXISID1"
                @CBF_array_structure_list_axis__axis_set_id="AXISSETID"
                @CBF_array_structure_list_axis__angle=ANGLE1
                @CBF_array_structure_list_axis__angle_increment=ANGLEINC1
                @CBF_array_structure_list_axis__displacement=DISP1
                @CBF_array_structure_list_axis__displacement=FRACTDISP1
                @CBF_array_structure_list_axis__displacement_increment=DISPINC1
                @CBF_array_structure_list_axis__fract_displacement_increment
                  =FRACTINC1
                @CBF_array_structure_list_axis__angular_pitch=ANGPITCH1
                @CBF_array_structure_list_axis__radial_pitch=RADPITCH1
                @CBF_array_structure_list_axis__reference_angle=REFANG1
                @CBF_array_structure_list_axis__reference_displacement=REFDISP1
             /AXISID2=[DISP2,DISP2+DISPINC2,...]
                  (or using angles where appropriate)
                @depends_on=...   determined from AXIS definitions
                @equipment="detector"
                @offset=[...] determined from AXIS definitions
                @offset_units="mm"
                @transformation_type="..." from AXIS definitions
                @units="mm"
                @vector=[...] determined from AXIS definitions
                @CBF_array_structure_list_axis__axis_id="AXISID2"
                @CBF_array_structure_list_axis__axis_set_id="AXISSETID"
                @CBF_array_structure_list_axis__angle=ANGLE2
                @CBF_array_structure_list_axis__angle_increment=ANGLEINC2
                @CBF_array_structure_list_axis__displacement=DISP2
                @CBF_array_structure_list_axis__displacement=FRACTDISP2
                @CBF_array_structure_list_axis__displacement_increment=DISPINC2
                @CBF_array_structure_list_axis__fract_displacement_increment
                  =FRACTINC2
                @CBF_array_structure_list_axis__angular_pitch=ANGPITCH2
                @CBF_array_structure_list_axis__radial_pitch=RADPITCH2
                @CBF_array_structure_list_axis__reference_angle=REFANG2
                @CBF_array_structure_list_axis__reference_displacement=REFDISP2
             /AXISID3=[DISP3,DISP3+DISPINC3,...]
                  (or using angles where appropriate)
                @depends_on=...   determined from AXIS definitions
                @equipment="detector"
                @offset=[...] determined from AXIS definitions
                @offset_units="mm"
                @transformation_type="..." from AXIS definitions
                @units="mm"
                @vector=[...] determined from AXIS definitions
                @CBF_array_structure_list_axis__axis_id="AXISID3"
                @CBF_array_structure_list_axis__axis_set_id="AXISSETID"
                @CBF_array_structure_list_axis__angle=ANGLE3
                @CBF_array_structure_list_axis__angle_increment=ANGLEINC3
                @CBF_array_structure_list_axis__displacement=DISP3
                @CBF_array_structure_list_axis__displacement=FRACTDISP3
                @CBF_array_structure_list_axis__displacement_increment=DISPINC3
                @CBF_array_structure_list_axis__fract_displacement_increment
                  =FRACTINC3
                @CBF_array_structure_list_axis__angular_pitch=ANGPITCH3
                @CBF_array_structure_list_axis__radial_pitch=RADPITCH3
                @CBF_array_structure_list_axis__reference_angle=REFANG3
                @CBF_array_structure_list_axis__reference_displacement=REFDISP3
   
    Notes: The same axis AXISIDn may appear in multiple axis sets for different
           values of PRECEDENCE of the data array, in which case the values
           in AXISIDn_indices with be the sorted list of PRECEDENCE-1 values
           and the array section nformation will be origanized by the
           same ordering.
;

     loop_
    _category_key.name             '_array_structure_list.array_id'
                                   '_array_structure_list.index'
                                   '_array_structure_list.variant'
     loop_
    _category_group.id             'inclusive_group'
                                   'array_data_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;       Example 1 - An image array of 1300 x 1200 elements.  The raster
                    order of the image is left to right (increasing) in the
                    first dimension and bottom to top (decreasing) in
                    the second dimension.
;
;
        loop_
       _array_structure_list.array_id
       _array_structure_list.index
       _array_structure_list.dimension
       _array_structure_list.precedence
       _array_structure_list.direction
       _array_structure_list.axis_set_id
        image_1   1    1300    1     increasing  ELEMENT_X
        image_1   2    1200    2     decreasing  ELEMENY_Y
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

     save_


save__array_structure_list.array_id
    _item_description.description
;             This item is a pointer to _array_structure.id in the
              ARRAY_STRUCTURE category.
;
    _item.name                  '_array_structure_list.array_id'
    _item.category_id             array_structure_list
    _item.mandatory_code          implicit
    _item_type.code               code
save_

save__array_structure_list.array_section_id
    _item_description.description
;             This item is a pointer to _array_structure_list_section.id in the
              ARRAY_STRUCTURE_LIST_SECTION category.
;
    _item.name                  '_array_structure_list.array_id'
    _item.category_id             array_structure_list
    _item.mandatory_code          implicit
    _item_type.code               code
save_


save__array_structure_list.axis_set_id
    _item_description.description
;              This is a descriptor for the physical axis or set of axes
               corresponding to an array index.

               This data item is related to the axes of the detector
               itself given in DIFFRN_DETECTOR_AXIS, but usually differs
               in that the axes in this category are the axes of the
               coordinate system of reported data points, while the axes in
               DIFFRN_DETECTOR_AXIS are the physical axes
               of the detector describing the 'poise' of the detector as an
               overall physical object.

               If there is only one axis in the set, the identifier of
               that axis should be used as the identifier of the set.
;
     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
           '_array_structure_list.axis_set_id'
                                  array_structure_list            yes
           '_array_structure_list_axis.axis_set_id'
                                  array_structure_list_axis       implicit
    _item_type.code               code
     loop_
    _item_linked.child_name
    _item_linked.parent_name
           '_array_structure_list_axis.axis_set_id'
                               '_array_structure_list.axis_set_id'
     save_


save__array_structure_list.dimension
    _item_description.description
;              The number of elements stored in the array structure in
               this dimension.
;
    _item.name                '_array_structure_list.dimension'
    _item.category_id          array_structure_list
    _item.mandatory_code       yes
    _item_type.code            int
     loop_
    _item_range.maximum
    _item_range.minimum
                            1  1
                            .  1
     save_


save__array_structure_list.direction
    _item_description.description
;             Identifies the direction in which this array index changes.
;
    _item.name                '_array_structure_list.direction'
    _item.category_id          array_structure_list
    _item.mandatory_code       yes
    _item_type.code            code
     loop_
    _item_enumeration.value
    _item_enumeration.detail

                              'increasing'
;        Indicates the index changes from 1 to the maximum dimension.
;
                              'decreasing'
;        Indicates the index changes from the maximum dimension to 1.
;
     save_


save__array_structure_list.index
    _item_description.description
;              Identifies the one-based index of the row or column in the
               array structure.
;
     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
           '_array_structure_list.index'        array_structure_list   yes
           '_array_structure_list.precedence'   array_structure_list   yes
           '_array_element_size.index'          array_element_size     yes

    _item_type.code            int

     loop_
    _item_linked.child_name
    _item_linked.parent_name
          '_array_structure_list_section.index'
                        '_array_structure_list.index'
          '_array_element_size.index'
                        '_array_structure_list.index'

     loop_
    _item_range.maximum
    _item_range.minimum
                            1  1
                            .  1
     save_


save__array_structure_list.precedence
    _item_description.description
;              Identifies the rank order in which this array index changes
               with respect to other array indices.  The precedence of 1
               indicates the index which changes fastest.
;
    _item.name                '_array_structure_list.precedence'
    _item.category_id          array_structure_list
    _item.mandatory_code       yes
    _item_type.code            int
     loop_
    _item_range.maximum
    _item_range.minimum
                            1  1
                            .  1
     save_
    
save__array_structure_list.variant
    _item_description.description
;             The value of _array_structure_list.variant gives the variant
              to which the given ARRAY_STRUCTURE_LIST row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_array_structure_list.variant'
    _item.category_id             array_structure_list
    _item.mandatory_code          implicit
    _item_type.code               code
     save_



################################
# ARRAY_STRUCTURE_LIST_SECTION #
################################


save_array_structure_list_section
    _category.description
;    Data items in the ARRAY_STRUCTURE_LIST_SECTION category identify
     the dimension-by-dimension start, end and stride of each section of an
     array that is to be referenced.
   
     For any array of array_id, ARRAYID, array section ids of the form
     ARRAYID(start1:end1:stride1,start2:end2:stride2, ...) are defined
     by default.
   
     For the given index, the elements in
     the section are of indices:  _array_structure_list_section.start,
       _array_structure_list_section.start
         +_array_structure_list_section.stride,
       _array_structure_list_section.start
        +2*_array_structure_list_section.stride,
       ...
     stopping either when the indices leave the limits of the indices of that dimension
     or [min(_array_structure_list_section.start,
     _array_structure_list_section.end),
     max(_array_structure_list_section.start,
     _array_structure_list_section.end)].
   
   
     The ordering of these elements is determined by the overall ordering of
     _array_structure_list_section.array_id and not by the ordering implied by the
     stride.

;
    _category.id                   array_structure_list_section
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _array_structure_list_section.array_id ARRAYID -->
    _array_structure_list_section.id SECTIONID -->
    _array_structure_list_section.index INDEX-->
    _array_structure_list_section.end END -->
    _array_structure_list_section.start START -->
    _array_structure_list_section.stride STRIDE -->
    /instrument:NXinstrument
       /DETECTORNAME:NXdetector_group
       /DETECTORELEMENTNAME:NXdetector
           /data_ARRAYID_BINARYID -->
                /entry/data_ARRAYID_BINARYID/data_ARRAYID_BINARYID
           /AXISID1 -->
                /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID1
           /AXISID2 -->
                /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID2
           /AXISID2 -->
                /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID3
           /ARRAYSECTIONID:NXdetector_module
             /data_origin=[...] -- the 0-based origins indices of ARRAYSECTIONID
             /data_size=[...] the sizes in pixels of ARRAYSECTIONID
             /data_stride[...] the strides of ARRAYSECTIONID

;

     loop_
    _category_key.name             '_array_structure_list_section.id'
                                   '_array_structure_list_section.array_id'
                                   '_array_structure_list_section.index'
                                   '_array_structure_list_section.variant'
     loop_
    _category_group.id             'inclusive_group'
                                   'array_data_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;       Example 1 - An image array, myarry, of 1300 x 1200 elements,
                    700 frames is defined in ARRAY_STRUCTURE_LIST, and
                    the array section identifier
   
                    "myarray(101:1200,101:1100,1:700:10)"
   
                    is explicitly defined taking every 10th frame and
                    removing a 100 pixel border.  Note that even though
                    the slow index high is 700, the last frame that
                    will actually be included in only 691.
;
;
 
     loop_
    _array_structure_list.array_id
    _array_structure_list.index
    _array_structure_list.dimension
    _array_structure_list.precedence
    _array_structure_list.direction
    _array_structure_list.axis_set_id
    myarray   1    1300    1     increasing  ELEMENT_X
    myarray   2    1200    2     increasing  ELEMENT_Y
    myarray   3    700     3     increasing  FRAME_NO
   
     loop_
    _array_structure_list_section.id
    _array_structure_list_section.array_id
    _array_structure_list_section.index
    _array_structure_list_section.start
    _array_structure_list_section.end
    _array_structure_list_section.stride
    "myarray(101:1200,101:1100,1:700:10)"  myarray 1 101 1200   .
    "myarray(101:1200,101:1100,1:700:10)"  myarray 2 101 1100   .
    "myarray(101:1200,101:1100,1:700:10)"  myarray 3   1  700  10

;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
   
     save_


save__array_structure_list_section.array_id
    _item_description.description
;             This item is a pointer to _array_structure.id in the
              ARRAY_STRUCTURE category.
;
    _item.name                  '_array_structure_list_section.array_id'
    _item.category_id             array_structure_list_section
    _item.mandatory_code          implicit
    _item_type.code               code
save_


save__array_structure_list_section.end
    _item_description.description
;              Identifies the ending ordinal, numbered from 1, for an array
               element of index _array_structure_list_section.index in the
               section.

               The value defaults to the dimension for index
               _array_structure_list_section.index
               of the array.
   
               Note that this agrees with the Fortran convention, rather than
               the Python convention in that, if compatible with the stride,
               the end element is included in the section as in Fortran, rather
               than being one beyond the section as in Python.
;

    _item.name               '_array_structure_list_section.end'
    _item.category_id          array_structure_list_section
    _item.mandatory_code       implicit
    _item_type.code            int
     loop_
    _item_range.maximum
    _item_range.minimum
                            1  1
                            .  1
     save_
   
save__array_structure_list_section.id
    _item_description.description
;             Uniquely identifies the array section chosen.
   
              To avoid confusion array section IDs that contain parentheses
              should conform to the default syntax
   
              ARRAYID(start1:end1:stride1,start2:end2:stride2, ...)
;
    _item.name                  '_array_structure_list_section.id'
    _item.category_id             array_structure_list_section
    _item.mandatory_code          yes
    _item_type.code               code
   
     loop_
    _item_linked.child_name
    _item_linked.parent_name
                            '_diffrn_data_frame.array_section_id'
                              '_array_structure_list_section.id'
                            '_map_segment.array_section_id'
                              '_array_structure_list_section.id'

save_


save__array_structure_list_section.index
    _item_description.description
;         This item is a pointer to _array_structure_list.index
              in the ARRAY_STRUCTURE_LIST category.
   
              Identifies the one-based index of the row, column, sheet ...
              the ARRAY_STRUCTURE_LIST category.
   
              For a multidimensional array, a value must be explicitly given.
   
              If an index is omitted from section then all elements for that
              index are assumed to be included in the section.
;
    _item.name                 '_array_structure_list_section.index'
    _item.category_id          array_structure_list_section
    _item.mandatory_code       implicit
    _item_type.code            int
     save_


save__array_structure_list_section.start
    _item_description.description
;              Identifies the starting ordinal, numbered from 1,
               for an array element of index _array_structure_list_section.index
               in the section.
   
               The value defaults to 1.   For the given index, the elements in
               the section are of indices:  _array_structure_list_section.start,
                   _array_structure_list_section.start
                     +_array_structure_list_section.stride,
                   _array_structure_list_section.start
                     +2*_array_structure_list_section.stride,
                   ...
               stopping either when the indices leave the limits of the indices of that dimension
               or [min(_array_structure_list_section.start,
                     _array_structure_list_section.end),
                   max(_array_structure_list_section.start,
                     _array_structure_list_section.end)].
   
   
               The ordering of these elements is determined by the overall ordering of
               _array_structure_list_section.array_id and not by the ordering implied by the
               stride.
;
    _item.name                 '_array_structure_list_section.start'
    _item.category_id          array_structure_list_section
    _item.mandatory_code       implicit
    _item_type.code            int
     loop_
    _item_range.maximum
    _item_range.minimum
                            1  1
                            .  1
     save_


save__array_structure_list_section.stride
    _item_description.description
;             Identifies the incremental steps to be taken when moving
              element to element in the section in that particular
              dimension.  The value of _array_structure_list_section.stride may be
              positive or negative.  If the stride is zero, the section is
              just defined by _array_structure_list_section.start.
;
    _item.name                '_array_structure_list_section.stride'
    _item.category_id          array_structure_list_section
    _item.mandatory_code       no
    _item_default.value        1
    _item_type.code            int
     loop_
    _item_range.maximum
    _item_range.minimum
                            1  1
                            .  1
     save_
    
save__array_structure_list_section.variant
    _item_description.description
;             The value of _array_structure_list_section.variant gives the variant
              to which the given ARRAY_STRUCTURE_LIST_SECTION row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_array_structure_list_section.variant'
    _item.category_id             array_structure_list_section
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


   
#############################
# ARRAY_STRUCTURE_LIST_AXIS #
#############################

save_array_structure_list_axis
    _category.description
;    Data items in the ARRAY_STRUCTURE_LIST_AXIS category describe
     the physical settings of sets of axes for the centres of pixels that
     correspond to data points described in the
     ARRAY_STRUCTURE_LIST category.

     In the simplest cases, the physical increments of a single axis correspond
     to the increments of a single array index.  More complex organizations,
     e.g. spiral scans, may require coupled motions along multiple axes.

     Note that a spiral scan uses two coupled axes: one for the angular
     direction and one for the radial direction.  This differs from a
     cylindrical scan for which the two axes are not coupled into one
     set.
   
     Axes may be specified wither for an entire array or for just a section
     of an array.
;
    _category.id                   array_structure_list_axis
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _array_structure_list.axis_set_id AXISSETID
    _array_structure_list.array_id ARRAYID
    _array_structure_list.array_section_id ARRAYSECTIONID
    _array_structure_list.dimension DIM
    _array_structure_list.direction DIR
    _array_structure_list.index INDEX
    _array_structure_list.precedence PRECEDENCE
   
    _array_structure_list_section.array_id ARRAYID -->
    _array_structure_list_section.id ARRAYSECTIONID -->
    _array_structure_list_section.index PRECEDENCE-->
    _array_structure_list_section.end END -->
    _array_structure_list_section.start START -->
    _array_structure_list_section.stride STRIDE -->

   
    loop_
    _array_structure_list_axis.axis_id
    _array_structure_list_axis.axis_set_id
    _array_structure_list_axis.angle
    _array_structure_list_axis.angle_increment
    _array_structure_list_axis.displacement
    _array_structure_list_axis.fract_displacement 
    _array_structure_list_axis.displacement_increment
    _array_structure_list_axis.fract_displacement_increment
    _array_structure_list_axis.angular_pitch 
    _array_structure_list_axis.reference_angle
    _array_structure_list_axis.reference_displacement REFDISP
    AXISID1 AXISSETID ANGLE1 ANGLEINC1 DISP1 FRACTDISP1
         DISPINC1 FRACTINC1 ANGPITCH1 REFANG1
    AXISID2 AXISSETID ANGLE2 ANGLEINC2 DISP2 FRACTDISP2
         DISPINC2 FRACTINC2 ANGPITCH2 REFANG2
    AXISID3 AXISSETID ANGLE3 ANGLEINC3 DISP3 FRACTDISP3
         DISPINC3 FRACTINC3 ANGPITCH3 REFANG3
   
    _diffrn_data_frame.array_id ARRAYID
    _diffrn_data_frame.binary_id BINARYID
    _diffrn_data_frame.center_fast CENF
    _diffrn_data_frame.center_slow CENS
    _diffrn_data_frame.center_units UNITS
    _diffrn_data_frame.detector_element_id ELEMENTID
    _diffrn_data_frame.id FRAMEID
    _diffrn_data_frame.details DETAILS

    -->
   
    ...
   
   
   /entry:NXentry
     /data_ARRAYID_BINARYID:NXdata
        @signal="data_ARRAYID_BINARY_ID"
        /data_ARRAYID_BINARYID[ the data for the array ARRAYID,
                                binary BINARYID, all sections,
                                all FRAMES]
        @axes=[...,AXISID1,...] with AXISID1 inserted at PRECEDENCE-1
        @AXISID1_indices=[PRECEDENCE-1]
        @AXISID2_indices=[PRECEDENCE-1]
        @AXISID3_indices=[PRECEDENCE-1]
        @AXISID1_origins=[origin1]  (defualt 0)
        @AXISID2_origins=[origin2]  (defualt 0)
        @AXISID3_origins=[origin3]  (defualt 0)
        @AXISID1_sizes=[size1]
        @AXISID2_sizes=[size2]
        @AXISID3_sizes=[size3]
        @AXISID1_strides=[stride1]
        @AXISID2_strides=[stride2]
        @AXISID3_strides=[stride3]
   
        ...
        /AXISID1 -->
            /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID1
        /AXISID2 -->
            /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID2
        /AXISID2 -->
            /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID3
        ...
       
     /instrument:NXinstrument
       /DETECTORNAME:NXdetector_group
       /DETECTORELEMENTNAME:NXdetector
           /data_ARRAYID_BINARYID -->
                /entry/data_ARRAYID_BINARYID/data_ARRAYID_BINARYID
           /AXISID1 -->
                /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID1
           /AXISID2 -->
                /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID2
           /AXISID2 -->
                /entry/instrument/DETECTORELEMENTNAME/transformations/AXISID3
           /ARRAYSECTIONID:NXdetector_module
             /data_origin=[...] -- the 0-based origins indices of ARRAYSECTIONID
             /data_size=[...] the sizes in pixels of ARRAYSECTIONID
             /data_stride[...] the strides of ARRAYSECTIONID
               ..
           /transformations:NXtransformations
             /AXISID1=[DISP1,DISP1+DISPINC1,...]   (or using angles where appropriate)
                @depends_on=...   determined from AXIS definitions
                @equipment="detector"
                @offset=[...] determined from AXIS definitions
                @offset_units="mm"
                @transformation_type="..." from AXIS definitions
                @units="mm"
                @vector=[...] determined from AXIS definitions
                @CBF_array_structure_list_axis__axis_id="AXISID1"
                @CBF_array_structure_list_axis__axis_set_id="AXISSETID"
                @CBF_array_structure_list_axis__angle=ANGLE1
                @CBF_array_structure_list_axis__angle_increment=ANGLEINC1
                @CBF_array_structure_list_axis__displacement=DISP1
                @CBF_array_structure_list_axis__displacement=FRACTDISP1
                @CBF_array_structure_list_axis__displacement_increment=DISPINC1
                @CBF_array_structure_list_axis__fract_displacement_increment=FRACTINC1
                @CBF_array_structure_list_axis__angular_pitch=ANGPITCH1
                @CBF_array_structure_list_axis__radial_pitch=RADPITCH1
                @CBF_array_structure_list_axis__reference_angle=REFANG1
                @CBF_array_structure_list_axis__reference_displacement=REFDISP1
             /AXISID2=[DISP2,DISP2+DISPINC2,...]   (or using angles where appropriate)
                @depends_on=...   determined from AXIS definitions
                @equipment="detector"
                @offset=[...] determined from AXIS definitions
                @offset_units="mm"
                @transformation_type="..." from AXIS definitions
                @units="mm"
                @vector=[...] determined from AXIS definitions
                @CBF_array_structure_list_axis__axis_id="AXISID2"
                @CBF_array_structure_list_axis__axis_set_id="AXISSETID"
                @CBF_array_structure_list_axis__angle=ANGLE2
                @CBF_array_structure_list_axis__angle_increment=ANGLEINC2
                @CBF_array_structure_list_axis__displacement=DISP2
                @CBF_array_structure_list_axis__displacement=FRACTDISP2
                @CBF_array_structure_list_axis__displacement_increment=DISPINC2
                @CBF_array_structure_list_axis__fract_displacement_increment=FRACTINC2
                @CBF_array_structure_list_axis__angular_pitch=ANGPITCH2
                @CBF_array_structure_list_axis__radial_pitch=RADPITCH2
                @CBF_array_structure_list_axis__reference_angle=REFANG2
                @CBF_array_structure_list_axis__reference_displacement=REFDISP2
             /AXISID3=[DISP3,DISP3+DISPINC3,...]   (or using angles where appropriate)
                @depends_on=...   determined from AXIS definitions
                @equipment="detector"
                @offset=[...] determined from AXIS definitions
                @offset_units="mm"
                @transformation_type="..." from AXIS definitions
                @units="mm"
                @vector=[...] determined from AXIS definitions
                @CBF_array_structure_list_axis__axis_id="AXISID3"
                @CBF_array_structure_list_axis__axis_set_id="AXISSETID"
                @CBF_array_structure_list_axis__angle=ANGLE3
                @CBF_array_structure_list_axis__angle_increment=ANGLEINC3
                @CBF_array_structure_list_axis__displacement=DISP3
                @CBF_array_structure_list_axis__displacement=FRACTDISP3
                @CBF_array_structure_list_axis__displacement_increment=DISPINC3
                @CBF_array_structure_list_axis__fract_displacement_increment=FRACTINC3
                @CBF_array_structure_list_axis__angular_pitch=ANGPITCH3
                @CBF_array_structure_list_axis__radial_pitch=RADPITCH3
                @CBF_array_structure_list_axis__reference_angle=REFANG3
                @CBF_array_structure_list_axis__reference_displacement=REFDISP3
   
    Notes: The same axis AXISIDn may appear in multiple axis sets for different
           values of PRECEDENCE of the data array, in which case the values
           in AXISIDn_indices with be the sorted list of PRECEDENCE-1 values
           and the array section nformation will be origanized by the
           same ordering.
;

     loop_
    _category_key.name
                                  '_array_structure_list_axis.axis_set_id'
                                  '_array_structure_list_axis.axis_id'
                                  '_array_structure_list_axis.variant'
     loop_
    _category_group.id           'inclusive_group'
                                 'array_data_group'

     save_


save__array_structure_list_axis.axis_id
    _item_description.description
;              The value of this data item is the identifier of one of
               the axes in the set of axes for which settings are being
               specified.

               Multiple axes may be specified for the same value of
               _array_structure_list_axis.axis_set_id.

               This item is a pointer to _axis.id in the
               AXIS category.
;
    _item.name                 '_array_structure_list_axis.axis_id'
    _item.category_id          array_structure_list_axis
    _item.mandatory_code       yes
    _item_type.code            code
     save_


save__array_structure_list_axis.axis_set_id
    _item_description.description
;              The value of this data item is the identifier of the
               set of axes for which axis settings are being specified.

               Multiple axes may be specified for the same value of
               _array_structure_list_axis.axis_set_id.

               This item is a pointer to
               _array_structure_list.axis_set_id
               in the ARRAY_STRUCTURE_LIST category.

               If this item is not specified, it defaults to the corresponding
               axis identifier.
;
    _item.name                 '_array_structure_list_axis.axis_set_id'
    _item.category_id          array_structure_list_axis
    _item.mandatory_code       implicit
    _item_type.code            code
     save_


save__array_structure_list_axis.angle
    _item_description.description
;              The setting of the specified axis in degrees for the first
               data point of the array index with the corresponding value
               of _array_structure_list.axis_set_id.  If the index is
               specified as 'increasing', this will be the centre of the
               pixel with index value 1.  If the index is specified as
               'decreasing', this will be the centre of the pixel with
               maximum index value.
;
    _item.name                 '_array_structure_list_axis.angle'
    _item.category_id          array_structure_list_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'degrees'
     save_


save__array_structure_list_axis.angle_increment
    _item_description.description
;              The pixel-centre-to-pixel-centre increment in the angular
               setting of the specified axis in degrees.  This is not
               meaningful in the case of 'constant velocity' spiral scans
               and should not be specified for this case.

               See _array_structure_list_axis.angular_pitch.

;
    _item.name                 '_array_structure_list_axis.angle_increment'
    _item.category_id          array_structure_list_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'degrees'
     save_


save__array_structure_list_axis.displacement
    _item_description.description
;              The setting of the specified axis in millimetres for the first
               data point of the array index with the corresponding value
               of _array_structure_list.axis_set_id.  If the index is
               specified as 'increasing', this will be the centre of the
               pixel with index value 1.  If the index is specified as
               'decreasing', this will be the centre of the pixel with
               maximum index value.
;
    _item.name               '_array_structure_list_axis.displacement'
    _item.category_id          array_structure_list_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'millimetres'
     save_

save__array_structure_list_axis.fract_displacement
    _item_description.description
;              The setting of the specified axis as a decimal fraction of
               the axis unit vector for the first data point of the array
               index with the corresponding value of
               _array_structure_list.axis_set_id. 
               If the index is specified as 'increasing', this will be the
               centre of the pixel with index value 1.  If the index is
               specified as 'decreasing', this will be the centre of the
               pixel with maximum index value.
;
    _item.name               '_array_structure_list_axis.fract_displacement'
    _item.category_id          array_structure_list_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
     save_

save__array_structure_list_axis.displacement_increment
    _item_description.description
;              The pixel-centre-to-pixel-centre increment for the displacement
               setting of the specified axis in millimetres.
;
    _item.name
        '_array_structure_list_axis.displacement_increment'
    _item.category_id          array_structure_list_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'millimetres'
     save_

save__array_structure_list_axis.fract_displacement_increment
    _item_description.description
;              The pixel-centre-to-pixel-centre increment for the displacement
               setting of the specified axis as a decimal fraction of the
               axis unit vector.
;
    _item.name
        '_array_structure_list_axis.fract_displacement_increment'
    _item.category_id          array_structure_list_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'millimetres'
     save_


save__array_structure_list_axis.angular_pitch
    _item_description.description
;              The pixel-centre-to-pixel-centre distance for a one-step
               change in the setting of the specified axis in millimetres.

               This is meaningful only for 'constant velocity' spiral scans
               or for uncoupled angular scans at a constant radius
               (cylindrical scans) and should not be specified for cases
               in which the angle between pixels (rather than the distance
               between pixels) is uniform.

               See _array_structure_list_axis.angle_increment.
;
    _item.name               '_array_structure_list_axis.angular_pitch'
    _item.category_id          array_structure_list_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'millimetres'
     save_


save__array_structure_list_axis.radial_pitch
    _item_description.description
;              The radial distance from one 'cylinder' of pixels to the
               next in millimetres.  If the scan is a 'constant velocity'
               scan with differing angular displacements between pixels,
               the value of this item may differ significantly from the
               value of _array_structure_list_axis.displacement_increment.
;
    _item.name               '_array_structure_list_axis.radial_pitch'
    _item.category_id          array_structure_list_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'millimetres'
     save_


save__array_structure_list_axis.reference_angle
     _item_description.description
;              The value of _array_structure_list_axis.reference_angle
               specifies the setting of the angle of this axis used for
               determining a reference beam center and a reference detector
               distance.  It is normally expected to be identical to the
               value of _array_structure_list_axis.angle.

;
     _item.name '_array_structure_list_axis.reference_angle'
     _item.category_id          array_structure_list_axis
     _item.mandatory_code       implicit
     _item_type.code            float
     _item_units.code           'degrees'
      save_


save__array_structure_list_axis.reference_displacement
     _item_description.description
;              The value of _array_structure_list_axis.reference_displacement
               specifies the setting of the displacement of this axis used
               for determining a reference beam center and a reference detector
               distance.  It is normally expected to be identical to the value
               of _array_structure_list_axis.displacement.

;
     _item.name '_array_structure_list_axis.reference_displacement'
     _item.category_id          array_structure_list_axis
     _item.mandatory_code       implicit
     _item_type.code            float
     _item_units.code           'millimetres'
      save_

save__array_structure_list_axis.variant
    _item_description.description
;             The value of _array_structure_list_axis.variant gives the variant
              to which the given ARRAY_STRUCTURE_LIST_AXIS row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_array_structure_list_axis.variant'
    _item.category_id             array_structure_list_axis
    _item.mandatory_code          implicit
    _item_type.code               code
     save_



########
# AXIS #
########

save_axis
    _category.description
;    Data items in the AXIS category record the information required
     to describe the various goniometer, detector, source and other
     axes needed to specify a data collection or the axes defining the
     coordinate system of an image. 
    
     The location of each axis is specified by two vectors: the axis
     itself, given by a unit vector in the direction of the axis, and
     an offset to the base of the unit vector. 
    
     The vectors defining an axis are referenced to an appropriate
     coordinate system, given in _axis.system.  The axis vector, itself,
       [_axis.vector[1], _axis.vector[2], _axis.vector[3]]
     is a dimensionless unit vector.  Where meaningful, an offset vector
       [_axis.offset[1], _axis.offset[2], _axis.offset[3]X, Y and Z.  This is appropriate for
     the imgCIF standard laboratory coordinate system, the NeXus/HDF5
     McStas laboratory coordinate system and the last two Cartesian
     coordinate systems, but for the direct lattice, X corresponds
     to a, Y to b and Z to c, while for the reciprocal lattice,
     X corresponds to a*, Y to b* and Z to c*.
    
     For purposes of visualization, all the coordinate systems are
     taken as right-handed, i.e., using the convention that the extended
     thumb of a right hand could point along the first (X) axis, the
     straightened pointer finger could point along the second (Y) axis
     and the middle finger folded inward could point along the third (Z)
     axis.  For a right-handed rotation axis, if the right hand is wrapped
     around the axis with the thumb pointed in the direction of the axis,
     the fingers point in the positive rotation direction, i.e. clockwise. 
    
     THE IMGCIF STANDARD LABORATORY COORDINATE SYSTEM
    
     The imgCIF standard laboratory coordinate system is a right-handed  
     orthogonal coordinate similar to the MOSFLM coordinate system, 
     but imgCIF puts Z along the X-ray beam, rather than putting X along the
     X-ray beam as in MOSFLM.
   
     The vectors for the imgCIF standard laboratory coordinate system
     form a right-handed Cartesian coordinate system with its origin
     in the sample or specimen.  The origin of the axis system should,
     if possible, be defined in terms of mechanically stable axes to be
     be both in the sample and in the beam.  If the sample goniometer or other
     sample positioner has two axes the intersection of which defines a
     unique point at which the sample should be mounted to be bathed
     by the beam, that will be the origin of the axis system.  If no such
     point is defined, then the midpoint of the line of intersection
     between the sample and the center of the beam will define the origin.
     For this definition the sample positioning system will be set at
     its initial reference position for the experiment.


                             | Y (to complete right-handed system)
                             |
                             |
                             |
                             |
                             |
                             |________________X
                            /       principal goniometer axis
                           /
                          /
                         /
                        /
                       /Z (to source)




     Axis 1 (X): The X-axis is aligned to the mechanical axis pointing from
     the sample or specimen along the  principal axis of the goniometer or
     sample positioning system if the sample positioning system has an axis
     that intersects the origin and which form an angle of more than 22.5
     degrees with the beam axis.
    
     Axis 2 (Y): The Y-axis completes an orthogonal right-handed system
     defined by the X-axis and the Z-axis (see below).

     Axis 3 (Z): The Z-axis is derived from the source axis which goes from
     the sample to the source.  The Z-axis is the component of the source axis
     in the direction of the source orthogonal to the X-axis in the plane
     defined by the X-axis and the source axis.

     If the conditions for the X-axis can be met, the coordinate system
     will be based on the goniometer or other sample positioning system
     and the beam and not on the orientation of the detector, gravity etc. 
     The vectors necessary to specify all other axes are given by sets of
     three components in the order (X, Y, Z).
     If the axis involved is a rotation axis, it is right-handed, i.e. as
     one views the object to be rotated from the origin (the tail) of the
     unit vector, the rotation is clockwise.  If a translation axis is
     specified, the direction of the unit vector specifies the sense of
     positive translation.
    
     In some experimental techniques, there is no goniometer or the principal
     axis of the goniometer is at a small acute angle with respect to
     the source axis.  In such cases, other reference axes are needed
     to define a useful coordinate system.  The order of priority in
     defining directions in such cases is to use the detector, then
     gravity, then north.
    
     If the X-axis cannot be defined as above, then the
     direction (not the origin) of the X-axis should be parallel to the axis
     of the primary detector element corresponding to the most rapidly
     varying dimension of that detector element's data array, with its
     positive sense corresponding to increasing values of the index for
     that dimension.  If the detector is such that such a direction cannot
     be defined (as with a point detector) or that direction forms an
     angle of less than 22.5 degrees with respect to the source axis, then
     the X-axis should be chosen so that if the Y-axis is chosen
     in the direction of gravity, and the Z-axis is chosen to be along
     the source axis, a right-handed orthogonal coordinate system is chosen. 
     In the case of a vertical source axis, as a last resort, the
     X-axis should be chosen to point North.
    
     All rotations are given in degrees and all translations are given in mm.

     Axes may be dependent on one another.  The X-axis is the only goniometer
     axis the direction of which is strictly connected to the hardware.  All
     other axes are specified by the positions they would assume when the
     axes upon which they depend are at their zero points.

     When specifying detector axes, the axis is given to the beam centre.
     The location of the beam centre on the detector should be given in the
     DIFFRN_DETECTOR category in distortion-corrected millimetres from
     the (0,0) corner of the detector.
   
     For convenience when describing detector element (module) placement,
     and optional mounting rotation axis and rotation angle may be
     specified.  In such cases, the mounting rotation axis and angle
     of rotation around the mounting rotation axis are applied after
     applying the transformations upon which the given axis depends.

     It should be noted that many different origins arise in the definition
     of an experiment.  In particular, as noted above, it is necessary to
     specify the location of the beam centre on the detector in terms
     of the origin of the detector, which is, of course, not coincident
     with the centre of the sample.
    
     THE NEXUS/HDF5 MCSTAS LABORATORY COORDINATE SYSTEM

     The standard coordinate frame in NeXus is the McStas coordinate frame,
     in which the Z-axis points in the direction of the incident beam, the
     X-axis is orthogonal to the Z-axis in the horizontal plane and pointing
     left as seen from the source and the Y-axis points upwards.  The
     origin is in the sample.

     Differences in Coordinate Frames
   
     The standard coordinate frame in imgCIF/CBF aligns the X-axis to the
     principal goniometer axis, chooses the Z-axis to point from the sample
     into the beam.  If the beam is not orthogonal to the X-axis, the Z-axis
     is the component of the vector points into the beam orthogonal to the
     X-axis.  The Y-axis is chosen to complete a right-handed axis system.

     Let us call the NeXus coordinate axes, X_nx, Y_nx and Z_nx and the
     imgCIF/CBF coordinate axes, X_cbf, Y_cbf and $Z_cbf and the direction
     of gravity, Gravity.  In order to translate a vector v_nx = ( x, y, z)
     from the NeXus coordinate system to the imgCIF coordinate system, we
     also need two additional axes, as unit vectors, Gravity_cbf the downwards
     direction, and  Beam_cbf, the direction of the beam, e.g. ( 0, 0, -1).  

     In practice, the beam is not necessarily perfectly horizontal, so Y_nx
     is not necessarily perfectly vertical. Therefore, in order to generate
     X_nx, Y_nx and Z_nx some care is needed.  The cross product between two
     vectors a and b is a new vector c orthogonal to both a and b,
     chosen so that a, b, c is a right handed system.  If a and b are
     orthogonal unit vectors, this right-handed system is an orthonormal
     coordinate system.

     In the CBF coordinate frame, Z_nx is aligned to Beam_cbf

        Z_nx = Beam_cbf
   
     X_nx is defined as being horizontal at right angles to the beam,
     pointing to the left when seen from the source.  Assuming the beam is
     not vertical, we can compute X_nx as the normalized cross product of
     the  beam and the gravity:

        X_nx = (Beam_cbf x Gravity_cbf)/||Beam_cbf x Gravity_cbf||

     To see that this satisfies the constraint of being horizontal and
     pointing to the left, consider the case of Beam = ( 0, 0, -1 )
     and Gravity = ( 0, 0, 1 ) then we would have X_nx = ( 1, 0, 0 )
     from the cross product above.  The normalization is only necessary
     if the beam is not horizontal.

     Finally Y_nx is computed as the cross product of the beam and X_nx,
     completing an orthonormal right-handed system with Y_nx pointing upwards

        Y_nx = Beam_cbf x X_nx

     Then we know that in the imgCIF/CBF coordinate frame
   
        v_nx = X.X_nx + Y.Y_nx + Z.Z_nx

     Thus, given the imgCIF/CBF vectors for the true direction of the beam
     and the true direction of gravity, we have a linear transformation from
     the NeXus coordinate frame to the imgCIF/CBF coordinate frame.   The
     origins of the two frames agree.   The inverse linear transformation will
     transform a vector in the imgCIF/CBF coordinate frame into the NeXus
     coordinate frame.

     In the common case in which the beam is orthogonal to the principal
     goniometer axis so that Beam_cbf = ( 0, 0, -1 ) and the imgCIF/CBF
     Y-axis points upwards, the transformation inverts the X and Z axes.
     In the other common case in which the beam is orthogonal to the
     principal goniometer axis and the imgCIF/CBF Y-axis points
     downwards, the transformation inverts the Y and Z axes.
                                         
     Mapping Axes

     There are two transformations needed:  coordxform(v) which takes a vector,
     v, in the CBF imgCIF Standard Laboratory Coordinate System and returns the
     equivalent McStas coordinate vector, and offsetxform(o) which takes an
     offset, o, in the the CBF imgCIF Standard Laboratory Coordinate System and
     returns the equivalent NeXus offset.

     In imgCIF/CBF all the information about all axes other than their
     settings are gathered in one AXIS category.  The closest equivalent
     container in NeXus is the NXinstrument class.  We put the information
     about detector axes into a
     detector:NXdetector/tranformations:NXtransformations NeXus class instance,
     information about the goniometer into a
     goniometer:NXgoniometer/tranformations:NXtransformations NeXus
     class instance, etc.  Additionally, in view of the general nature of
     some axes, such as the coordinate frame axes and gravity, we add a
     transformations:NXtransformation NeXus class instance under NXentry with
     axis__gravity, axis__beam and other axes not tied to specific equipment.

     We have applied the coordinate frame transformation changing
     the CBF laboratory coordinates into McStas coordinates.  Notice that X and
     Z have changed direction, but Y has not.   In other experimental setup,
     other transformations may occur.   The offsets for dependent axes are
     given relative to the total offset of axes on which that axis is dependent.
     Note that the axis settings do not enter into this calculation, because the
     offsets of dependent axes are given with all axes at their zero settings


     The cbf_location attribute gives a mapping back into the CBF AXIS category
     in dotted notation.  The first component is the data block.  The second
     component is "axis".  The third component is either "vector" or
     "offset"  for information drawn from the AXIS.VECTOR[...] or
     AXIS.OFFSET[...] respectively.  The last component is the CBF row number
     to facilitate recovering the original CBF layout.


     THE DIRECT LATTICE (FRACTIONAL COORDINATES)
    
     The unit cell, reciprocal cell and crystallographic orthogonal
     Cartesian coordinate system are defined by the CELL and the matrices
     in the ATOM_SITES category.
    
     The direct lattice coordinate system is a system of fractional
     coordinates aligned to the crystal, rather than to the laboratory.
     This is a natural coordinate system for maps and atomic coordinates.
     It is the simplest coordinate system in which to apply symmetry.
     The axes are determined by the cell edges, and are not necessarily
     othogonal.  This coordinate system is not uniquely defined and
     depends on the cell parameters in the CELL category and the
     settings chosen to index the crystal.
    
     Molecules in a crystal studied by X-ray diffracraction are organized
     into a repeating regular array of unit cells.  Each unit cell is defined
     by three vectors, a, b and c.  To quote from Drenth,
    
    
     "The choice of the unit cell is not unique and therefore, guidelines
     have been established for selecting the standard basis vectors and
     the origin.  They are based on symmetry and metric considerations:
    
      "(1)  The axial system should be right handed.
       (2)  The basis vectors should coincide as much as possible with
       directions of highest symmetry."
       (3)  The cell taken should be the smallest one that satisfies
       condition (2)
       (4)  Of all the lattice vectors, none is shorter than a.
       (5)  Of those not directed along a, none is shorter than b.
       (6)  Of those not lying in the ab plane, none is shorter than c.
       (7)  The three angles between the basis vectors a, b and c are
       either all acute (<90 degrees) or all obtuse (>= 90 degrees)."
    
     These rules do not produce a unique result that is stable under
     the assumption of experimental errors, and the the resulting cell
     may not be primitive.
    
     In this coordinate system, the vector (.5, .5, .5) is in the middle
     of the given unit cell.
    
     Grid coordinates are an important variation on fractional coordinates
     used when working with maps.  In imgCIF, the conversion from
     fractional to grid coordinates is implicit in the array indexing
     specified by _array_structure_list.dimension.  Note that this
     implicit grid-coordinate scheme is 1-based, not zero-based, i.e.
     the origin of the cell for axes along the cell edges with no
     specified _array_structure_list_axis.displacement will have
     grid coordinates of (1,1,1), i.e. array indices of (1,1,1).
    
     THE ORTHOGONAL CARTESIAN COORDINATE SYSTEM (REAL SPACE)
    
     The orthogonal Cartesian coordinate system is a transformation of
     the direct lattice to the actual physical coordinates of atoms in
     space.  It is similar to the laboratory coordinate system, but
     is anchored to and moves with the crystal, rather than being
     schored to the laboratory.  The transformation from fractional
     to orthogonal cartesian coordinates is given by the
              _atom_sites.Cartn_transf_matrix[i][j]  and
              _atom_sites.Cartn_transf_vector[i]
     tags.  A common choice for the matrix of the transformation is
     given in the 1992 PDB format document
    
              | a      b cos(\g)   c cos(\b)                            |
              | 0      b sin(\g)   c (cos(\a) - cos(\b)cos(\g))/sin(\g) |
              | 0      0           V/(a b sin(\g))                      |
    
     This is a convenient coordinate system in which to do fitting
     of models to maps and in which to understand the chemistry of
     a molecule.
    
     THE RECIPROCAL LATTICE
    
     The reciprocal lattice coordinate system is used for diffraction
     intensitities.  It is based on the reciprocal cell, the dual of the cell,
     in which reciprocal cell edges are derived from direct cell faces:
    
        a* = bc sin(\a)/V  b* = ac sin(\b)/V  c* = ab sin(\g)/V
        cos(\a*) = (cos(\b) cos(\g) - cos(\a))/(sin(\b) sin(\g))
        cos(\b*) = (cos(\a) cos(\g) - cos(\b))/(sin(\a) sin(\g))
        cos(\g*) = (cos(\a) cos(\b) - cos(\g))/(sin(\a) sin(\b))
        V = abc SQRT(1 - cos(\a)^^2^
                       - cos(\b)^^2^
                       - cos(\g)^^2^
                       + 2 cos(\a) cos(\b) cos(\g) )
    
     In this form the dimensions of the reciprocal lattice are in reciprocal
     \%Angstroms (\%A^^-1^).  A dimensionless form can be obtained by
     multiplying by the wavelength.  Reflections are commonly indexed against
     this coordinate system as (h, k, l) triples.
    

    
     References:
    
     Drenth, J., "Introduction to basic crystallography." chapter
     2.1 in Rossmann, M. G. and Arnold, E. "Crystallography of
     biological macromolecules", Volume F of the IUCr's "International
     tables for crystallography", Kluwer, Dordrecht 2001, pp 44 -- 63

     Leslie, A. G. W. and Powell, H. (2004). MOSFLM v6.11.
     MRC Laboratory of Molecular Biology, Hills Road, Cambridge, England.
     http://www.CCP4.ac.uk/dist/X-windows/Mosflm/.
    
     Stout, G. H. and Jensen, L. H., "X-ray structure determination",
     2nd ed., Wiley, New York, 1989, 453 pp.
    
     __, "PROTEIN DATA BANK ATOMIC COORDINATE AND BIBLIOGRAPHIC ENTRY
     FORMAT DESCRIPTION," Brookhaven National Laboratory, February 1992.
;
    _category.id                   axis
    _category.mandatory_code       no
    _category.NX_mapping_details
;
    _axis.id                  AXISID
    _axis.type                AXISTYPE
    _axis.equipment           AXISEQUIPMENT
    _axis.equipment_component AXISEQUIPCOMP
    _axis.depends_on          AXISDEPENDSON
    _axis.rotation_axis       AXISROTAXIS
    _axis.rotation            AXISROTATION
    _axis.vector[1]           AXISV1
    _axis.vector[2]           AXISV2
    _axis.vector[3]           AXISV3
    _axis.offset[1]           AXISO1
    _axis.offset[2]           AXISO2
    _axis.offset[3]           AXISO3
    _axis.system              AXISSYSTEM
   
    -->

{     /entry:NXentry
        /instrument:NXinstrument
         /DETECTORELEMENTNAME:NXdetector
for AXISEQUIPMENT=="detector"}
{     /entry:NXentry
        /sample:NXsample
for AXISEQUIPMENT=="goniometer"}
{     /entry:NXentry
for AXISEQUIPMENT=="general"}
          /transformations:NXtransformations
            /AXISID=[]
              @units="mm"  if AXISTYPE=="translation"
              or @units="degrees"  if AXISTYPE=="rotation"
              @transformation_type="AXISTYPE"
              @equipment_component="AXISEQUIPCOMP"
              @depends_on="AXISDEPENDSON"
              @rotation_axis="AXISROTAXIS"
              @rotation=AXISROTATION
              @rotation_units="degrees"
              @offset=offsetxform([O1,O2,O3])
              @offset_inits="mm"
              @vector=coordxform([V1,V2,V3])
   




;

     loop_
    _category_key.name          '_axis.id'
                                '_axis.equipment'
                                '_axis.variant'
     loop_
    _category_group.id           'inclusive_group'
                                 'axis_group'
                                 'diffrn_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;       Example 1 -

        This example shows the axis specification of the axes of a kappa-
        geometry goniometer [see Stout, G. H. & Jensen, L. H. (1989). X-ray
        structure determination. A practical
        guide, 2nd ed. p. 134. New York: Wiley Interscience].

        There are three axes specified, and no offsets.  The outermost axis,
        omega, is pointed along the X axis.  The next innermost axis, kappa,
        is at a 50 degree angle to the X axis, pointed away from the source.
        The innermost axis, phi, aligns with the X axis when omega and
        phi are at their zero points.  If T-omega, T-kappa and T-phi
        are the transformation matrices derived from the axis settings,
        the complete transformation would be:
            X' = (T-omega) (T-kappa) (T-phi) X
;
;
         loop_
        _axis.id
        _axis.type
        _axis.equipment
        _axis.depends_on
        _axis.vector[1] _axis.vector[2] _axis.vector[3]
        omega rotation goniometer     .    1        0        0
        kappa rotation goniometer omega    -.64279  0       -.76604
        phi   rotation goniometer kappa    1        0        0
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;       Example 2 -

        This example shows the axis specification of the axes of a
        detector, source and gravity.  The order has been changed as a
        reminder that the ordering of presentation of tokens is not
        significant.  The centre of rotation of the detector has been taken
        to be 68 millimetres in the direction away from the source.
;
;
        loop_
        _axis.id
        _axis.type
        _axis.equipment
        _axis.depends_on
        _axis.vector[1] _axis.vector[2] _axis.vector[3]
        _axis.offset[1] _axis.offset[2] _axis.offset[3]
        source       .        source     .       0     0     1   . . .
        gravity      .        gravity    .       0    -1     0   . . .
        tranz     translation detector rotz      0     0     1   0 0 -68
        twotheta  rotation    detector   .       1     0     0   . . .
        roty      rotation    detector twotheta  0     1     0   0 0 -68
        rotz      rotation    detector roty      0     0     1   0 0 -68
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;       Example 3 -

        This example show the axis specification of the axes for a map,
        using fractional coordinates.  Each cell edge has been divided
        into a grid of 50 divisions in the ARRAY_STRUCTURE_LIST_AXIS
        category.  The map is using only the first octant of the grid
        in the ARRAY_STRUCTURE_LIST category.

        The fastest changing axis is the gris along A, then along B,
        and the slowest is along C.
       
        The map sampling is being done in the middle of each grid
        division
       
;
;
        loop_
        _axis.id
        _axis.system
        _axis.vector[1] _axis.vector[2] _axis.vector[3]
        CELL_A_AXIS    fractional       1 0 0
        CELL_B_AXIS    fractional       0 1 0
        CELL_C_AXIS    fractional       0 0 1
       
        loop_
        _array_structure_list.array_id
        _array_structure_list.index
        _array_structure_list.dimension
        _array_structure_list.precedence
        _array_structure_list.direction
        _array_structure_list.axis_set_id
        map 1 25 1 increasing CELL_A_AXIS
        map 1 25 2 increasing CELL_B_AXIS
        map 1 25 3 increasing CELL_C_AXIS
       
        loop_
        _array_structure_list_axis.axis_id
        _array_structure_list_axis.fract_displacement
        _array_structure_list_axis.fract_displacement_increment
        CELL_A_AXIS 0.01 0.02
        CELL_B_AXIS 0.01 0.02
        CELL_C_AXIS 0.01 0.02

       
       
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;       Example 4 -

        This example show the axis specification of the axes for a map,
        this time as orthogonal \%Angstroms, using the same coordinate system
        as for the atomic coordinates.  The map is sampling every 1.5
        \%Angstroms (1.5e-7 millimeters) in a map segment 37.5 \%Angstroms on
        a side.
       
;
;
        loop_
        _axis.id
        _axis.system
        _axis.vector[1] _axis.vector[2] _axis.vector[3]
        X    orthogonal       1 0 0
        Y    orthogonal       0 1 0
        Z    orthogonal       0 0 1
       
                loop_
        _array_structure_list.array_id
        _array_structure_list.index
        _array_structure_list.dimension
        _array_structure_list.precedence
        _array_structure_list.direction
        _array_structure_list.axis_set_id
        map 1 25 1 increasing X
        map 2 25 2 increasing Y
        map 3 25 3 increasing Z
       
        loop_
        _array_structure_list_axis.axis_id
        _array_structure_list_axis.displacement
        _array_structure_list_axis.displacement_increment
        X 7.5e-8 1.5e-7
        Y 7.5e-8 1.5e-7
        Z 7.5e-8 1.5e-7


;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;       Example 5 -
   
    This example show an excerpt from the axis specification of an FEL detector
    provided by N. Sauter and A. Brewster.
   
    The detector is divided into 4 quadrants, each quadrant contains 8 sensors
    and each sensor contains 2 ASICs.  We want to be able to refine the
    placement of each of these elements, so we maintain the set of vectors
    that places them.
   
;
;
    loop_
    _diffrn_detector_axis.detector_id
    _diffrn_detector_axis.axis_id
    CSPAD_FRONT AXIS_D0_X
    CSPAD_FRONT AXIS_D0_Y
    CSPAD_FRONT AXIS_D0_Z
    CSPAD_FRONT AXIS_D0_R
    CSPAD_FRONT FS_D0Q0
    CSPAD_FRONT FS_D0Q0S0
    CSPAD_FRONT FS_D0Q0S0A0
    CSPAD_FRONT FS_D0Q0S0A1
    CSPAD_FRONT FS_D0Q0S1
    CSPAD_FRONT FS_D0Q0S1A0
    CSPAD_FRONT FS_D0Q0S1A1
    CSPAD_FRONT FS_D0Q0S2
    CSPAD_FRONT FS_D0Q0S2A0
    CSPAD_FRONT FS_D0Q0S2A1
    CSPAD_FRONT FS_D0Q0S3
    CSPAD_FRONT FS_D0Q0S3A0
    CSPAD_FRONT FS_D0Q0S3A1
    CSPAD_FRONT FS_D0Q0S4
    CSPAD_FRONT FS_D0Q0S4A0
    CSPAD_FRONT FS_D0Q0S4A1
    CSPAD_FRONT FS_D0Q0S5
    CSPAD_FRONT FS_D0Q0S5A0
    CSPAD_FRONT FS_D0Q0S5A1
    CSPAD_FRONT FS_D0Q0S6
    CSPAD_FRONT FS_D0Q0S6A0
    CSPAD_FRONT FS_D0Q0S6A1
    CSPAD_FRONT FS_D0Q0S7
    CSPAD_FRONT FS_D0Q0S7A0
    CSPAD_FRONT FS_D0Q0S7A1
    CSPAD_FRONT FS_D0Q1
    CSPAD_FRONT FS_D0Q1S0
    CSPAD_FRONT FS_D0Q1S0A0
    CSPAD_FRONT FS_D0Q1S0A1
    CSPAD_FRONT FS_D0Q1S1
    CSPAD_FRONT FS_D0Q1S1A0
    CSPAD_FRONT FS_D0Q1S1A1
    CSPAD_FRONT FS_D0Q1S2
    CSPAD_FRONT FS_D0Q1S2A0
    CSPAD_FRONT FS_D0Q1S2A1
    CSPAD_FRONT FS_D0Q1S3
    CSPAD_FRONT FS_D0Q1S3A0
    CSPAD_FRONT FS_D0Q1S3A1
    CSPAD_FRONT FS_D0Q1S4
    CSPAD_FRONT FS_D0Q1S4A0
    CSPAD_FRONT FS_D0Q1S4A1
    CSPAD_FRONT FS_D0Q1S5
    CSPAD_FRONT FS_D0Q1S5A0
    CSPAD_FRONT FS_D0Q1S5A1
    CSPAD_FRONT FS_D0Q1S6
    CSPAD_FRONT FS_D0Q1S6A0
    CSPAD_FRONT FS_D0Q1S6A1
    CSPAD_FRONT FS_D0Q1S7
    CSPAD_FRONT FS_D0Q1S7A0
    CSPAD_FRONT FS_D0Q1S7A1
    CSPAD_FRONT FS_D0Q2
    CSPAD_FRONT FS_D0Q2S0
    CSPAD_FRONT FS_D0Q2S0A0
    CSPAD_FRONT FS_D0Q2S0A1
    CSPAD_FRONT FS_D0Q2S1
    CSPAD_FRONT FS_D0Q2S1A0
    CSPAD_FRONT FS_D0Q2S1A1
    CSPAD_FRONT FS_D0Q2S2
    CSPAD_FRONT FS_D0Q2S2A0
    CSPAD_FRONT FS_D0Q2S2A1
    CSPAD_FRONT FS_D0Q2S3
    CSPAD_FRONT FS_D0Q2S3A0
    CSPAD_FRONT FS_D0Q2S3A1
    CSPAD_FRONT FS_D0Q2S4
    CSPAD_FRONT FS_D0Q2S4A0
    CSPAD_FRONT FS_D0Q2S4A1
    CSPAD_FRONT FS_D0Q2S5
    CSPAD_FRONT FS_D0Q2S5A0
    CSPAD_FRONT FS_D0Q2S5A1
    CSPAD_FRONT FS_D0Q2S6
    CSPAD_FRONT FS_D0Q2S6A0
    CSPAD_FRONT FS_D0Q2S6A1
    CSPAD_FRONT FS_D0Q2S7
    CSPAD_FRONT FS_D0Q2S7A0
    CSPAD_FRONT FS_D0Q2S7A1
    CSPAD_FRONT FS_D0Q3
    CSPAD_FRONT FS_D0Q3S0
    CSPAD_FRONT FS_D0Q3S0A0
    CSPAD_FRONT FS_D0Q3S0A1
    CSPAD_FRONT FS_D0Q3S1
    CSPAD_FRONT FS_D0Q3S1A0
    CSPAD_FRONT FS_D0Q3S1A1
    CSPAD_FRONT FS_D0Q3S2
    CSPAD_FRONT FS_D0Q3S2A0
    CSPAD_FRONT FS_D0Q3S2A1
    CSPAD_FRONT FS_D0Q3S3
    CSPAD_FRONT FS_D0Q3S3A0
    CSPAD_FRONT FS_D0Q3S3A1
    CSPAD_FRONT FS_D0Q3S4
    CSPAD_FRONT FS_D0Q3S4A0
    CSPAD_FRONT FS_D0Q3S4A1
    CSPAD_FRONT FS_D0Q3S5
    CSPAD_FRONT FS_D0Q3S5A0
    CSPAD_FRONT FS_D0Q3S5A1
    CSPAD_FRONT FS_D0Q3S6
    CSPAD_FRONT FS_D0Q3S6A0
    CSPAD_FRONT FS_D0Q3S6A1
    CSPAD_FRONT FS_D0Q3S7
    CSPAD_FRONT FS_D0Q3S7A0
    CSPAD_FRONT FS_D0Q3S7A1
   
    loop_
    _diffrn_detector_element.id
    _diffrn_detector_element.detector_id
    ELE_D0Q0S0A0 CSPAD_FRONT
    ELE_D0Q0S0A1 CSPAD_FRONT
    ELE_D0Q0S1A0 CSPAD_FRONT
    ELE_D0Q0S1A1 CSPAD_FRONT
    ELE_D0Q0S2A0 CSPAD_FRONT
    ELE_D0Q0S2A1 CSPAD_FRONT
    ELE_D0Q0S3A0 CSPAD_FRONT
    ELE_D0Q0S3A1 CSPAD_FRONT
    ELE_D0Q0S4A0 CSPAD_FRONT
    ELE_D0Q0S4A1 CSPAD_FRONT
    ELE_D0Q0S5A0 CSPAD_FRONT
    ELE_D0Q0S5A1 CSPAD_FRONT
    ELE_D0Q0S6A0 CSPAD_FRONT
    ELE_D0Q0S6A1 CSPAD_FRONT
    ELE_D0Q0S7A0 CSPAD_FRONT
    ELE_D0Q0S7A1 CSPAD_FRONT
    ELE_D0Q1S0A0 CSPAD_FRONT
    ELE_D0Q1S0A1 CSPAD_FRONT
    ELE_D0Q1S1A0 CSPAD_FRONT
    ELE_D0Q1S1A1 CSPAD_FRONT
    ELE_D0Q1S2A0 CSPAD_FRONT
    ELE_D0Q1S2A1 CSPAD_FRONT
    ELE_D0Q1S3A0 CSPAD_FRONT
    ELE_D0Q1S3A1 CSPAD_FRONT
    ELE_D0Q1S4A0 CSPAD_FRONT
    ELE_D0Q1S4A1 CSPAD_FRONT
    ELE_D0Q1S5A0 CSPAD_FRONT
    ELE_D0Q1S5A1 CSPAD_FRONT
    ELE_D0Q1S6A0 CSPAD_FRONT
    ELE_D0Q1S6A1 CSPAD_FRONT
    ELE_D0Q1S7A0 CSPAD_FRONT
    ELE_D0Q1S7A1 CSPAD_FRONT
    ELE_D0Q2S0A0 CSPAD_FRONT
    ELE_D0Q2S0A1 CSPAD_FRONT
    ELE_D0Q2S1A0 CSPAD_FRONT
    ELE_D0Q2S1A1 CSPAD_FRONT
    ELE_D0Q2S2A0 CSPAD_FRONT
    ELE_D0Q2S2A1 CSPAD_FRONT
    ELE_D0Q2S3A0 CSPAD_FRONT
    ELE_D0Q2S3A1 CSPAD_FRONT
    ELE_D0Q2S4A0 CSPAD_FRONT
    ELE_D0Q2S4A1 CSPAD_FRONT
    ELE_D0Q2S5A0 CSPAD_FRONT
    ELE_D0Q2S5A1 CSPAD_FRONT
    ELE_D0Q2S6A0 CSPAD_FRONT
    ELE_D0Q2S6A1 CSPAD_FRONT
    ELE_D0Q2S7A0 CSPAD_FRONT
    ELE_D0Q2S7A1 CSPAD_FRONT
    ELE_D0Q3S0A0 CSPAD_FRONT
    ELE_D0Q3S0A1 CSPAD_FRONT
    ELE_D0Q3S1A0 CSPAD_FRONT
    ELE_D0Q3S1A1 CSPAD_FRONT
    ELE_D0Q3S2A0 CSPAD_FRONT
    ELE_D0Q3S2A1 CSPAD_FRONT
    ELE_D0Q3S3A0 CSPAD_FRONT
    ELE_D0Q3S3A1 CSPAD_FRONT
    ELE_D0Q3S4A0 CSPAD_FRONT
    ELE_D0Q3S4A1 CSPAD_FRONT
    ELE_D0Q3S5A0 CSPAD_FRONT
    ELE_D0Q3S5A1 CSPAD_FRONT
    ELE_D0Q3S6A0 CSPAD_FRONT
    ELE_D0Q3S6A1 CSPAD_FRONT
    ELE_D0Q3S7A0 CSPAD_FRONT
    ELE_D0Q3S7A1 CSPAD_FRONT
   
   
    loop_
    _axis.id
    _axis.type
    _axis.equipment
    _axis.depends_on
    _axis.vector[1]
    _axis.vector[2]
    _axis.vector[3]
    _axis.offset[1]
    _axis.offset[2]
    _axis.offset[3]
    _axis.equipment_component
    _axis.rotation
    _axis.rotation_axis
    AXIS_SOURCE general source . 0 0 1 . . . . . .
    AXIS_GRAVITY general gravity . 0 -1 0 . . . . . .
    AXIS_D0_Z translation detector . 0 0 1 . . . detector_arm . .
    AXIS_D0_Y translation detector AXIS_D0_Z 0 1 0 . . . detector_arm . .
    AXIS_D0_X translation detector AXIS_D0_Y 1 0 0 . . . detector_arm . .
    AXIS_D0_R rotation detector AXIS_D0_X 0 0 1 0.0 0.0 0.0 detector_arm . .
    FS_D0Q0 rotation detector AXIS_D0_R 0 0 1 -49.860765625 41.643353125 0.0 detector_quadrant . .
    FS_D0Q0S0 rotation detector FS_D0Q0 0.0 0.0 1.0 11.3696 -23.189925 0.0 detector_sensor . .
    FS_D0Q0S0A0 rotation detector FS_D0Q0S0 0 0 1 -10.835 0.0 0.0 detector_asic 89.66181 FS_D0Q0S0
    AXIS_D0Q0S0A0_F translation detector FS_D0Q0S0A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S0A0_S translation detector AXIS_D0Q0S0A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S0A1 rotation detector FS_D0Q0S0 0 0 1 10.835 0.0 0.0 detector_asic 89.66181 FS_D0Q0S0
    AXIS_D0Q0S0A1_F translation detector FS_D0Q0S0A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S0A1_S translation detector AXIS_D0Q0S0A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S1 rotation detector FS_D0Q0 0.0 0.0 1.0 34.815 -23.309825 0.0 detector_sensor . .
    FS_D0Q0S1A0 rotation detector FS_D0Q0S1 0 0 1 -10.835 0.0 0.0 detector_asic 90.00132 FS_D0Q0S1
    AXIS_D0Q0S1A0_F translation detector FS_D0Q0S1A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S1A0_S translation detector AXIS_D0Q0S1A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S1A1 rotation detector FS_D0Q0S1 0 0 1 10.835 0.0 0.0 detector_asic 90.00132 FS_D0Q0S1
    AXIS_D0Q0S1A1_F translation detector FS_D0Q0S1A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S1A1_S translation detector AXIS_D0Q0S1A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S2 rotation detector FS_D0Q0 -0.0 -0.0 -1.0 -23.5389 -10.921625 0.0 detector_sensor . .
    FS_D0Q0S2A0 rotation detector FS_D0Q0S2 0 0 1 -10.835 0.0 0.0 detector_asic 359.68548 FS_D0Q0S2
    AXIS_D0Q0S2A0_F translation detector FS_D0Q0S2A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S2A0_S translation detector AXIS_D0Q0S2A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S2A1 rotation detector FS_D0Q0S2 0 0 1 10.835 0.0 0.0 detector_asic 359.68548 FS_D0Q0S2
    AXIS_D0Q0S2A1_F translation detector FS_D0Q0S2A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S2A1_S translation detector AXIS_D0Q0S2A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S3 rotation detector FS_D0Q0 0.0 0.0 1.0 -23.5499 -34.181125 0.0 detector_sensor . .
    FS_D0Q0S3A0 rotation detector FS_D0Q0S3 0 0 1 -10.835 0.0 0.0 detector_asic 359.96513 FS_D0Q0S3
    AXIS_D0Q0S3A0_F translation detector FS_D0Q0S3A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S3A0_S translation detector AXIS_D0Q0S3A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S3A1 rotation detector FS_D0Q0S3 0 0 1 10.835 0.0 0.0 detector_asic 359.96513 FS_D0Q0S3
    AXIS_D0Q0S3A1_F translation detector FS_D0Q0S3A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S3A1_S translation detector AXIS_D0Q0S3A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S4 rotation detector FS_D0Q0 0.0 0.0 1.0 -11.2651 24.282775 0.0 detector_sensor . .
    FS_D0Q0S4A0 rotation detector FS_D0Q0S4 0 0 1 -10.835 0.0 0.0 detector_asic 270.14738 FS_D0Q0S4
    AXIS_D0Q0S4A0_F translation detector FS_D0Q0S4A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S4A0_S translation detector AXIS_D0Q0S4A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S4A1 rotation detector FS_D0Q0S4 0 0 1 10.835 0.0 0.0 detector_asic 270.14738 FS_D0Q0S4
    AXIS_D0Q0S4A1_F translation detector FS_D0Q0S4A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S4A1_S translation detector AXIS_D0Q0S4A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S5 rotation detector FS_D0Q0 0.0 0.0 1.0 -34.7336 24.169475 0.0 detector_sensor . .
    FS_D0Q0S5A0 rotation detector FS_D0Q0S5 0 0 1 -10.835 0.0 0.0 detector_asic 270.07896 FS_D0Q0S5
    AXIS_D0Q0S5A0_F translation detector FS_D0Q0S5A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S5A0_S translation detector AXIS_D0Q0S5A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S5A1 rotation detector FS_D0Q0S5 0 0 1 10.835 0.0 0.0 detector_asic 270.07896 FS_D0Q0S5
    AXIS_D0Q0S5A1_F translation detector FS_D0Q0S5A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S5A1_S translation detector AXIS_D0Q0S5A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S6 rotation detector FS_D0Q0 0.0 0.0 1.0 23.5488 33.320375 0.0 detector_sensor . .
    FS_D0Q0S6A0 rotation detector FS_D0Q0S6 0 0 1 -10.835 0.0 0.0 detector_asic 359.78222 FS_D0Q0S6
    AXIS_D0Q0S6A0_F translation detector FS_D0Q0S6A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S6A0_S translation detector AXIS_D0Q0S6A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S6A1 rotation detector FS_D0Q0S6 0 0 1 10.835 0.0 0.0 detector_asic 359.78222 FS_D0Q0S6
    AXIS_D0Q0S6A1_F translation detector FS_D0Q0S6A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S6A1_S translation detector AXIS_D0Q0S6A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S7 rotation detector FS_D0Q0 0.0 0.0 1.0 23.3541 9.829875 0.0 detector_sensor . .
    FS_D0Q0S7A0 rotation detector FS_D0Q0S7 0 0 1 -10.835 0.0 0.0 detector_asic 359.89604 FS_D0Q0S7
    AXIS_D0Q0S7A0_F translation detector FS_D0Q0S7A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S7A0_S translation detector AXIS_D0Q0S7A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q0S7A1 rotation detector FS_D0Q0S7 0 0 1 10.835 0.0 0.0 detector_asic 359.89604 FS_D0Q0S7
    AXIS_D0Q0S7A1_F translation detector FS_D0Q0S7A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q0S7A1_S translation detector AXIS_D0Q0S7A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1 rotation detector AXIS_D0_R 0 0 1 41.512521875 50.149653125 0.0 detector_quadrant . .
    FS_D0Q1S0 rotation detector FS_D0Q1 -0.0 -0.0 -1.0 -23.1589875 -11.451825 0.0 detector_sensor . .
    FS_D0Q1S0A0 rotation detector FS_D0Q1S0 0 0 1 -10.835 0.0 0.0 detector_asic 0.27238 FS_D0Q1S0
    AXIS_D0Q1S0A0_F translation detector FS_D0Q1S0A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S0A0_S translation detector AXIS_D0Q1S0A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S0A1 rotation detector FS_D0Q1S0 0 0 1 10.835 0.0 0.0 detector_asic 0.27238 FS_D0Q1S0
    AXIS_D0Q1S0A1_F translation detector FS_D0Q1S0A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S0A1_S translation detector AXIS_D0Q1S0A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S1 rotation detector FS_D0Q1 -0.0 -0.0 -1.0 -23.2073875 -34.782825 0.0 detector_sensor . .
    FS_D0Q1S1A0 rotation detector FS_D0Q1S1 0 0 1 -10.835 0.0 0.0 detector_asic 0.00525999986641 FS_D0Q1S1
    AXIS_D0Q1S1A0_F translation detector FS_D0Q1S1A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S1A0_S translation detector AXIS_D0Q1S1A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S1A1 rotation detector FS_D0Q1S1 0 0 1 10.835 0.0 0.0 detector_asic 0.00525999986641 FS_D0Q1S1
    AXIS_D0Q1S1A1_F translation detector FS_D0Q1S1A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S1A1_S translation detector AXIS_D0Q1S1A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S2 rotation detector FS_D0Q1 0.0 0.0 1.0 -10.7311875 23.286175 0.0 detector_sensor . .
    FS_D0Q1S2A0 rotation detector FS_D0Q1S2 0 0 1 -10.835 0.0 0.0 detector_asic 270.02545 FS_D0Q1S2
    AXIS_D0Q1S2A0_F translation detector FS_D0Q1S2A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S2A0_S translation detector AXIS_D0Q1S2A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S2A1 rotation detector FS_D0Q1S2 0 0 1 10.835 0.0 0.0 detector_asic 270.02545 FS_D0Q1S2
    AXIS_D0Q1S2A1_F translation detector FS_D0Q1S2A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S2A1_S translation detector AXIS_D0Q1S2A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S3 rotation detector FS_D0Q1 0.0 0.0 1.0 -34.1402875 23.344475 0.0 detector_sensor . .
    FS_D0Q1S3A0 rotation detector FS_D0Q1S3 0 0 1 -10.835 0.0 0.0 detector_asic 270.03066 FS_D0Q1S3
    AXIS_D0Q1S3A0_F translation detector FS_D0Q1S3A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S3A0_S translation detector AXIS_D0Q1S3A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S3A1 rotation detector FS_D0Q1S3 0 0 1 10.835 0.0 0.0 detector_asic 270.03066 FS_D0Q1S3
    AXIS_D0Q1S3A1_F translation detector FS_D0Q1S3A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S3A1_S translation detector AXIS_D0Q1S3A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S4 rotation detector FS_D0Q1 0.0 0.0 1.0 24.0035125 11.407275 0.0 detector_sensor . .
    FS_D0Q1S4A0 rotation detector FS_D0Q1S4 0 0 1 -10.835 0.0 0.0 detector_asic 179.96381 FS_D0Q1S4
    AXIS_D0Q1S4A0_F translation detector FS_D0Q1S4A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S4A0_S translation detector AXIS_D0Q1S4A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S4A1 rotation detector FS_D0Q1S4 0 0 1 10.835 0.0 0.0 detector_asic 179.96381 FS_D0Q1S4
    AXIS_D0Q1S4A1_F translation detector FS_D0Q1S4A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S4A1_S translation detector AXIS_D0Q1S4A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S5 rotation detector FS_D0Q1 0.0 0.0 1.0 24.0035125 34.876875 0.0 detector_sensor . .
    FS_D0Q1S5A0 rotation detector FS_D0Q1S5 0 0 1 -10.835 0.0 0.0 detector_asic 180.02434 FS_D0Q1S5
    AXIS_D0Q1S5A0_F translation detector FS_D0Q1S5A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S5A0_S translation detector AXIS_D0Q1S5A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S5A1 rotation detector FS_D0Q1S5 0 0 1 10.835 0.0 0.0 detector_asic 180.02434 FS_D0Q1S5
    AXIS_D0Q1S5A1_F translation detector FS_D0Q1S5A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S5A1_S translation detector AXIS_D0Q1S5A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S6 rotation detector FS_D0Q1 0.0 0.0 1.0 33.2523125 -23.321925 0.0 detector_sensor . .
    FS_D0Q1S6A0 rotation detector FS_D0Q1S6 0 0 1 -10.835 0.0 0.0 detector_asic 270.08027 FS_D0Q1S6
    AXIS_D0Q1S6A0_F translation detector FS_D0Q1S6A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S6A0_S translation detector AXIS_D0Q1S6A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S6A1 rotation detector FS_D0Q1S6 0 0 1 10.835 0.0 0.0 detector_asic 270.08027 FS_D0Q1S6
    AXIS_D0Q1S6A1_F translation detector FS_D0Q1S6A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S6A1_S translation detector AXIS_D0Q1S6A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S7 rotation detector FS_D0Q1 0.0 0.0 1.0 9.9785125 -23.358225 0.0 detector_sensor . .
    FS_D0Q1S7A0 rotation detector FS_D0Q1S7 0 0 1 -10.835 0.0 0.0 detector_asic 270.15067 FS_D0Q1S7
    AXIS_D0Q1S7A0_F translation detector FS_D0Q1S7A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S7A0_S translation detector AXIS_D0Q1S7A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q1S7A1 rotation detector FS_D0Q1S7 0 0 1 10.835 0.0 0.0 detector_asic 270.15067 FS_D0Q1S7
    AXIS_D0Q1S7A1_F translation detector FS_D0Q1S7A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q1S7A1_S translation detector AXIS_D0Q1S7A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2 rotation detector AXIS_D0_R 0 0 1 49.596146875 -41.351371875 0.0 detector_quadrant . .
    FS_D0Q2S0 rotation detector FS_D0Q2 -0.0 -0.0 -1.0 -11.3150125 23.1242 0.0 detector_sensor . .
    FS_D0Q2S0A0 rotation detector FS_D0Q2S0 0 0 1 -10.835 0.0 0.0 detector_asic 90.04803 FS_D0Q2S0
    AXIS_D0Q2S0A0_F translation detector FS_D0Q2S0A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S0A0_S translation detector AXIS_D0Q2S0A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S0A1 rotation detector FS_D0Q2S0 0 0 1 10.835 0.0 0.0 detector_asic 90.04803 FS_D0Q2S0
    AXIS_D0Q2S0A1_F translation detector FS_D0Q2S0A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S0A1_S translation detector AXIS_D0Q2S0A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S1 rotation detector FS_D0Q2 -0.0 -0.0 -1.0 -34.6999125 23.155 0.0 detector_sensor . .
    FS_D0Q2S1A0 rotation detector FS_D0Q2S1 0 0 1 -10.835 0.0 0.0 detector_asic 90.00592 FS_D0Q2S1
    AXIS_D0Q2S1A0_F translation detector FS_D0Q2S1A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S1A0_S translation detector AXIS_D0Q2S1A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S1A1 rotation detector FS_D0Q2S1 0 0 1 10.835 0.0 0.0 detector_asic 90.00592 FS_D0Q2S1
    AXIS_D0Q2S1A1_F translation detector FS_D0Q2S1A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S1A1_S translation detector AXIS_D0Q2S1A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S2 rotation detector FS_D0Q2 0.0 0.0 1.0 23.4746875 10.7811 0.0 detector_sensor . .
    FS_D0Q2S2A0 rotation detector FS_D0Q2S2 0 0 1 -10.835 0.0 0.0 detector_asic 180.11318 FS_D0Q2S2
    AXIS_D0Q2S2A0_F translation detector FS_D0Q2S2A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S2A0_S translation detector AXIS_D0Q2S2A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S2A1 rotation detector FS_D0Q2S2 0 0 1 10.835 0.0 0.0 detector_asic 180.11318 FS_D0Q2S2
    AXIS_D0Q2S2A1_F translation detector FS_D0Q2S2A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S2A1_S translation detector AXIS_D0Q2S2A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S3 rotation detector FS_D0Q2 0.0 0.0 1.0 23.6220875 34.2221 0.0 detector_sensor . .
    FS_D0Q2S3A0 rotation detector FS_D0Q2S3 0 0 1 -10.835 0.0 0.0 detector_asic 179.92104 FS_D0Q2S3
    AXIS_D0Q2S3A0_F translation detector FS_D0Q2S3A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S3A0_S translation detector AXIS_D0Q2S3A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S3A1 rotation detector FS_D0Q2S3 0 0 1 10.835 0.0 0.0 detector_asic 179.92104 FS_D0Q2S3
    AXIS_D0Q2S3A1_F translation detector FS_D0Q2S3A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S3A1_S translation detector AXIS_D0Q2S3A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S4 rotation detector FS_D0Q2 0.0 0.0 1.0 11.1953875 -23.9954 0.0 detector_sensor . .
    FS_D0Q2S4A0 rotation detector FS_D0Q2S4 0 0 1 -10.835 0.0 0.0 detector_asic 89.63875 FS_D0Q2S4
    AXIS_D0Q2S4A0_F translation detector FS_D0Q2S4A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S4A0_S translation detector AXIS_D0Q2S4A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S4A1 rotation detector FS_D0Q2S4 0 0 1 10.835 0.0 0.0 detector_asic 89.63875 FS_D0Q2S4
    AXIS_D0Q2S4A1_F translation detector FS_D0Q2S4A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S4A1_S translation detector AXIS_D0Q2S4A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S5 rotation detector FS_D0Q2 0.0 0.0 1.0 34.5494875 -24.1901 0.0 detector_sensor . .
    FS_D0Q2S5A0 rotation detector FS_D0Q2S5 0 0 1 -10.835 0.0 0.0 detector_asic 89.68154 FS_D0Q2S5
    AXIS_D0Q2S5A0_F translation detector FS_D0Q2S5A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S5A0_S translation detector AXIS_D0Q2S5A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S5A1 rotation detector FS_D0Q2S5 0 0 1 10.835 0.0 0.0 detector_asic 89.68154 FS_D0Q2S5
    AXIS_D0Q2S5A1_F translation detector FS_D0Q2S5A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S5A1_S translation detector AXIS_D0Q2S5A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S6 rotation detector FS_D0Q2 0.0 0.0 1.0 -23.4854125 -33.2552 0.0 detector_sensor . .
    FS_D0Q2S6A0 rotation detector FS_D0Q2S6 0 0 1 -10.835 0.0 0.0 detector_asic 179.83473 FS_D0Q2S6
    AXIS_D0Q2S6A0_F translation detector FS_D0Q2S6A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S6A0_S translation detector AXIS_D0Q2S6A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S6A1 rotation detector FS_D0Q2S6 0 0 1 10.835 0.0 0.0 detector_asic 179.83473 FS_D0Q2S6
    AXIS_D0Q2S6A1_F translation detector FS_D0Q2S6A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S6A1_S translation detector AXIS_D0Q2S6A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S7 rotation detector FS_D0Q2 0.0 0.0 1.0 -23.3413125 -9.8417 0.0 detector_sensor . .
    FS_D0Q2S7A0 rotation detector FS_D0Q2S7 0 0 1 -10.835 0.0 0.0 detector_asic 180.092 FS_D0Q2S7
    AXIS_D0Q2S7A0_F translation detector FS_D0Q2S7A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S7A0_S translation detector AXIS_D0Q2S7A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q2S7A1 rotation detector FS_D0Q2S7 0 0 1 10.835 0.0 0.0 detector_asic 180.092 FS_D0Q2S7
    AXIS_D0Q2S7A1_F translation detector FS_D0Q2S7A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q2S7A1_S translation detector AXIS_D0Q2S7A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3 rotation detector AXIS_D0_R 0 0 1 -41.247903125 -50.441634375 0.0 detector_quadrant . .
    FS_D0Q3S0 rotation detector FS_D0Q3 0.0 0.0 1.0 23.1056375 11.6367625 0.0 detector_sensor . .
    FS_D0Q3S0A0 rotation detector FS_D0Q3S0 0 0 1 -10.835 0.0 0.0 detector_asic 180.12436 FS_D0Q3S0
    AXIS_D0Q3S0A0_F translation detector FS_D0Q3S0A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S0A0_S translation detector AXIS_D0Q3S0A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S0A1 rotation detector FS_D0Q3S0 0 0 1 10.835 0.0 0.0 detector_asic 180.12436 FS_D0Q3S0
    AXIS_D0Q3S0A1_F translation detector FS_D0Q3S0A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S0A1_S translation detector AXIS_D0Q3S0A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S1 rotation detector FS_D0Q3 0.0 0.0 1.0 23.1298375 34.9864625 0.0 detector_sensor . .
    FS_D0Q3S1A0 rotation detector FS_D0Q3S1 0 0 1 -10.835 0.0 0.0 detector_asic 180.00263 FS_D0Q3S1
    AXIS_D0Q3S1A0_F translation detector FS_D0Q3S1A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S1A0_S translation detector AXIS_D0Q3S1A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S1A1 rotation detector FS_D0Q3S1 0 0 1 10.835 0.0 0.0 detector_asic 180.00263 FS_D0Q3S1
    AXIS_D0Q3S1A1_F translation detector FS_D0Q3S1A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S1A1_S translation detector AXIS_D0Q3S1A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S2 rotation detector FS_D0Q3 -0.0 -0.0 -1.0 10.9572375 -23.5830375 0.0 detector_sensor . .
    FS_D0Q3S2A0 rotation detector FS_D0Q3S2 0 0 1 -10.835 0.0 0.0 detector_asic 269.55191 FS_D0Q3S2
    AXIS_D0Q3S2A0_F translation detector FS_D0Q3S2A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S2A0_S translation detector AXIS_D0Q3S2A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S2A1 rotation detector FS_D0Q3S2 0 0 1 10.835 0.0 0.0 detector_asic 269.55191 FS_D0Q3S2
    AXIS_D0Q3S2A1_F translation detector FS_D0Q3S2A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S2A1_S translation detector AXIS_D0Q3S2A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S3 rotation detector FS_D0Q3 -0.0 -0.0 -1.0 34.4180375 -23.4818375 0.0 detector_sensor . .
    FS_D0Q3S3A0 rotation detector FS_D0Q3S3 0 0 1 -10.835 0.0 0.0 detector_asic 269.74206 FS_D0Q3S3
    AXIS_D0Q3S3A0_F translation detector FS_D0Q3S3A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S3A0_S translation detector AXIS_D0Q3S3A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S3A1 rotation detector FS_D0Q3S3 0 0 1 10.835 0.0 0.0 detector_asic 269.74206 FS_D0Q3S3
    AXIS_D0Q3S3A1_F translation detector FS_D0Q3S3A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S3A1_S translation detector AXIS_D0Q3S3A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S4 rotation detector FS_D0Q3 0.0 0.0 1.0 -24.1283625 -11.5336375 0.0 detector_sensor . .
    FS_D0Q3S4A0 rotation detector FS_D0Q3S4 0 0 1 -10.835 0.0 0.0 detector_asic 359.81971 FS_D0Q3S4
    AXIS_D0Q3S4A0_F translation detector FS_D0Q3S4A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S4A0_S translation detector AXIS_D0Q3S4A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S4A1 rotation detector FS_D0Q3S4 0 0 1 10.835 0.0 0.0 detector_asic 359.81971 FS_D0Q3S4
    AXIS_D0Q3S4A1_F translation detector FS_D0Q3S4A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S4A1_S translation detector AXIS_D0Q3S4A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S5 rotation detector FS_D0Q3 0.0 0.0 1.0 -24.1701625 -34.9548375 0.0 detector_sensor . .
    FS_D0Q3S5A0 rotation detector FS_D0Q3S5 0 0 1 -10.835 0.0 0.0 detector_asic 359.99883 FS_D0Q3S5
    AXIS_D0Q3S5A0_F translation detector FS_D0Q3S5A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S5A0_S translation detector AXIS_D0Q3S5A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S5A1 rotation detector FS_D0Q3S5 0 0 1 10.835 0.0 0.0 detector_asic 359.99883 FS_D0Q3S5
    AXIS_D0Q3S5A1_F translation detector FS_D0Q3S5A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S5A1_S translation detector AXIS_D0Q3S5A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S6 rotation detector FS_D0Q3 -0.0 -0.0 -1.0 -33.3089625 23.4474625 0.0 detector_sensor . .
    FS_D0Q3S6A0 rotation detector FS_D0Q3S6 0 0 1 -10.835 0.0 0.0 detector_asic 269.67299 FS_D0Q3S6
    AXIS_D0Q3S6A0_F translation detector FS_D0Q3S6A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S6A0_S translation detector AXIS_D0Q3S6A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S6A1 rotation detector FS_D0Q3S6 0 0 1 10.835 0.0 0.0 detector_asic 269.67299 FS_D0Q3S6
    AXIS_D0Q3S6A1_F translation detector FS_D0Q3S6A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S6A1_S translation detector AXIS_D0Q3S6A1_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S7 rotation detector FS_D0Q3 -0.0 -0.0 -1.0 -10.0032625 23.4826625 0.0 detector_sensor . .
    FS_D0Q3S7A0 rotation detector FS_D0Q3S7 0 0 1 -10.835 0.0 0.0 detector_asic 269.67561 FS_D0Q3S7
    AXIS_D0Q3S7A0_F translation detector FS_D0Q3S7A0 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S7A0_S translation detector AXIS_D0Q3S7A0_F 0 -1 0 0 0 0.0 detector_asic . .
    FS_D0Q3S7A1 rotation detector FS_D0Q3S7 0 0 1 10.835 0.0 0.0 detector_asic 269.67561 FS_D0Q3S7
    AXIS_D0Q3S7A1_F translation detector FS_D0Q3S7A1 1 0 0 -10.615000 10.120000 0.0 detector_asic . .
    AXIS_D0Q3S7A1_S translation detector AXIS_D0Q3S7A1_F 0 -1 0 0 0 0.0 detector_asic . .
   
   
;   
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;       Example 6 -
   
    This example show an excerpt from the axis specification of an FEL detector
    provided by N. Sauter and A. Brewster, using _axis.rotation_axis and
    _axis.rotation to organize the positional dependencies.  The approach
    in Example 5 is now preferred.
   
    The detector is divided into 4 quadrants, each quadrant contains 8 sensors
    and each sensor contains 2 ASICs.  We want to be able to refine the
    placement of each of these elements, so we maintain the set of vectors
    that places them.
   
    To do this, the first vector of importance is an initial placement axis
    that moves from the origin along the Z axis a distance equal to the
    detector distance.  This is the origin for the rest of the axes and is
    called AXIS_D0_ORIGIN.
   
    Each subsequent movement involves a frame shift.  This is done by using
    two imageCIF axes: a rotation axis and a translation axis.  The rotation
    axis is listed first, and includes no offset or angle.  The actual frame
    shift is done by using a translation axis.  An offset is used first in
    the parent's frame, and then an angle is listed to rotate around the
    rotation axis.
   
    Example, sensor five of quadrant 2.  First a rotation axis is listed:
   
    AXIS_D0Q2S5_ROT rotation detector AXIS_D0Q2 0.0 0.0 1.0 0 0 0 . .
    This defines a rotation axis around the z-axis in the frame of quadrant 2.
   
    Next a translation axis is listed:
    AXIS_D0Q2S5 translation detector
        AXIS_D0Q2 . . . 34.5494875 -24.1901 0.0 89.68154 AXIS_D0Q2S5_ROT
    Here, in the frame of quadrant 2, we shift X by 34 and Y by -24
    millimeters, then rotate 89 degrees around the axis named AXIS_D0Q2S5_ROT.
   
    And so forth.
;
;

     loop_
    _diffrn_detector_axis.detector_id
    _diffrn_detector_axis.axis_id
    CSPAD_FRONT AXIS_DETECTOR_X
    CSPAD_FRONT AXIS_DETECTOR_Y
    CSPAD_FRONT AXIS_DETECTOR_Z
    CSPAD_FRONT AXIS_DETECTOR_PITCH
   
     loop_
    _diffrn_detector_element.id
    _diffrn_detector_element.detector_id
    ELE_D0Q0S0A0 CSPAD_FRONT
    ELE_D0Q0S0A1 CSPAD_FRONT
    ELE_D0Q0S1A0 CSPAD_FRONT
    ELE_D0Q0S1A1 CSPAD_FRONT
    ELE_D0Q0S2A0 CSPAD_FRONT
    ELE_D0Q0S2A1 CSPAD_FRONT
    ELE_D0Q0S3A0 CSPAD_FRONT
    ELE_D0Q0S3A1 CSPAD_FRONT
    ELE_D0Q0S4A0 CSPAD_FRONT
    ELE_D0Q0S4A1 CSPAD_FRONT
    ELE_D0Q0S5A0 CSPAD_FRONT
    ELE_D0Q0S5A1 CSPAD_FRONT
    ELE_D0Q0S6A0 CSPAD_FRONT
    ELE_D0Q0S6A1 CSPAD_FRONT
    ELE_D0Q0S7A0 CSPAD_FRONT
    ELE_D0Q0S7A1 CSPAD_FRONT
    ELE_D0Q1S0A0 CSPAD_FRONT
    ELE_D0Q1S0A1 CSPAD_FRONT
    ELE_D0Q1S1A0 CSPAD_FRONT
    ELE_D0Q1S1A1 CSPAD_FRONT
    ELE_D0Q1S2A0 CSPAD_FRONT
    ELE_D0Q1S2A1 CSPAD_FRONT
    ELE_D0Q1S3A0 CSPAD_FRONT
    ELE_D0Q1S3A1 CSPAD_FRONT
    ELE_D0Q1S4A0 CSPAD_FRONT
    ELE_D0Q1S4A1 CSPAD_FRONT
    ELE_D0Q1S5A0 CSPAD_FRONT
    ELE_D0Q1S5A1 CSPAD_FRONT
    ELE_D0Q1S6A0 CSPAD_FRONT
    ELE_D0Q1S6A1 CSPAD_FRONT
    ELE_D0Q1S7A0 CSPAD_FRONT
    ELE_D0Q1S7A1 CSPAD_FRONT
    ELE_D0Q2S0A0 CSPAD_FRONT
    ELE_D0Q2S0A1 CSPAD_FRONT
    ELE_D0Q2S1A0 CSPAD_FRONT
    ELE_D0Q2S1A1 CSPAD_FRONT
    ELE_D0Q2S2A0 CSPAD_FRONT
    ELE_D0Q2S2A1 CSPAD_FRONT
    ELE_D0Q2S3A0 CSPAD_FRONT
    ELE_D0Q2S3A1 CSPAD_FRONT
    ELE_D0Q2S4A0 CSPAD_FRONT
    ELE_D0Q2S4A1 CSPAD_FRONT
    ELE_D0Q2S5A0 CSPAD_FRONT
    ELE_D0Q2S5A1 CSPAD_FRONT
    ELE_D0Q2S6A0 CSPAD_FRONT
    ELE_D0Q2S6A1 CSPAD_FRONT
    ELE_D0Q2S7A0 CSPAD_FRONT
    ELE_D0Q2S7A1 CSPAD_FRONT
    ELE_D0Q3S0A0 CSPAD_FRONT
    ELE_D0Q3S0A1 CSPAD_FRONT
    ELE_D0Q3S1A0 CSPAD_FRONT
    ELE_D0Q3S1A1 CSPAD_FRONT
    ELE_D0Q3S2A0 CSPAD_FRONT
    ELE_D0Q3S2A1 CSPAD_FRONT
    ELE_D0Q3S3A0 CSPAD_FRONT
    ELE_D0Q3S3A1 CSPAD_FRONT
    ELE_D0Q3S4A0 CSPAD_FRONT
    ELE_D0Q3S4A1 CSPAD_FRONT
    ELE_D0Q3S5A0 CSPAD_FRONT
    ELE_D0Q3S5A1 CSPAD_FRONT
    ELE_D0Q3S6A0 CSPAD_FRONT
    ELE_D0Q3S6A1 CSPAD_FRONT
    ELE_D0Q3S7A0 CSPAD_FRONT
    ELE_D0Q3S7A1 CSPAD_FRONT
   
   
     loop_
    _axis.id
    _axis.type
    _axis.equipment
    _axis.depends_on
    _axis.vector[1]
    _axis.vector[2]
    _axis.vector[3]
    _axis.offset[1]
    _axis.offset[2]
    _axis.offset[3]
    _axis.rotation
    _axis.rotation_axis
    AXIS_SOURCE general source   . 0 0 1 . . . . .
    AXIS_GRAVITY general gravity . 0 -1 0 . . . . .
    AXIS_DETECTOR_Z translation detector
                                 . 0 0 1 0 0 0 . .
    AXIS_DETECTOR_Y translation detector
                   AXIS_DETECTOR_Z 0 1 0 0 0 0 . .
    AXIS_DETECTOR_X translation detector
                   AXIS_DETECTOR_Y 1 0 0 0 0 0 . .
    AXIS_DETECTOR_PITCH rotation detector
                   AXIS_DETECTOR_X 0 1 0 0 0 0 . .
    AXIS_DETECTOR_ROT rotation detector
               AXIS_DETECTOR_PITCH 0 0 1 0 0 0 . .
    AXIS_D0_ORIGIN translation detector
               AXIS_DETECTOR_PITCH 0 0 1 0 0 171.0104 . .
    AXIS_D0_ROT rotation detector
                    AXIS_D0_ORIGIN 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0 translation detector
                    AXIS_D0_ORIGIN . . . 0.0 0.0 0.0 0.0 AXIS_D0_ROT
    AXIS_D0Q0_ROT rotation detector
                           AXIS_D0 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0 translation detector
                           AXIS_D0 . . . -49.860765625 41.643353125 0.0
                                      0.0 AXIS_D0Q0_ROT
    AXIS_D0Q0S0_ROT rotation detector
                          AXIS_D0Q0 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q0S0 translation detector
                          AXIS_D0Q0 . . . 11.3696 -23.189925 0.0
                                      89.66181 AXIS_D0Q0S0_ROT
    AXIS_D0Q0S0A0_ROT rotation detector
                        AXIS_D0Q0S0 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S0A0 translation detector
                        AXIS_D0Q0S0 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q0S0A0_ROT
    AXIS_D0Q0S0A0_F translation detector
                      AXIS_D0Q0S0A0 1 0 0 0 0 0 . .
    AXIS_D0Q0S0A0_S translation detector
                      AXIS_D0Q0S0A0 0 1 0 0 0 0 . .
    AXIS_D0Q0S0A1_ROT rotation detector
                        AXIS_D0Q0S0 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S0A1 translation detector
                        AXIS_D0Q0S0 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q0S0A1_ROT
    AXIS_D0Q0S0A1_F translation detector
                      AXIS_D0Q0S0A1 1 0 0 0 0 0 . .
    AXIS_D0Q0S0A1_S translation detector
                      AXIS_D0Q0S0A1 0 1 0 0 0 0 . .
    AXIS_D0Q0S1_ROT rotation detector
                          AXIS_D0Q0 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q0S1 translation detector
                          AXIS_D0Q0 . . . 34.815 -23.309825 0.0
                                      90.00132 AXIS_D0Q0S1_ROT
    AXIS_D0Q0S1A0_ROT rotation detector
                        AXIS_D0Q0S1 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S1A0 translation detector
                        AXIS_D0Q0S1 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q0S1A0_ROT
    AXIS_D0Q0S1A0_F translation detector
                      AXIS_D0Q0S1A0 1 0 0 0 0 0 . .
    AXIS_D0Q0S1A0_S translation detector
                      AXIS_D0Q0S1A0 0 1 0 0 0 0 . .
    AXIS_D0Q0S1A1_ROT rotation detector
                        AXIS_D0Q0S1 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S1A1 translation detector
                        AXIS_D0Q0S1 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q0S1A1_ROT
    AXIS_D0Q0S1A1_F translation detector
                      AXIS_D0Q0S1A1 1 0 0 0 0 0 . .
    AXIS_D0Q0S1A1_S translation detector
                      AXIS_D0Q0S1A1 0 1 0 0 0 0 . .
    AXIS_D0Q0S2_ROT rotation detector
                          AXIS_D0Q0 -0.0 -0.0 -1.0 0 0 0 . .
    AXIS_D0Q0S2 translation detector
                          AXIS_D0Q0 . . . -23.5389 -10.921625 0.0
                                     359.68548 AXIS_D0Q0S2_ROT
    AXIS_D0Q0S2A0_ROT rotation detector
                        AXIS_D0Q0S2 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S2A0 translation detector
                        AXIS_D0Q0S2 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q0S2A0_ROT
    AXIS_D0Q0S2A0_F translation detector
                        AXIS_D0Q0S2A0 1 0 0 0 0 0 . .
    AXIS_D0Q0S2A0_S translation detector
                        AXIS_D0Q0S2A0 0 1 0 0 0 0 . .
    AXIS_D0Q0S2A1_ROT rotation detector
                        AXIS_D0Q0S2 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S2A1 translation detector
                        AXIS_D0Q0S2 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q0S2A1_ROT
    AXIS_D0Q0S2A1_F translation detector
                        AXIS_D0Q0S2A1 1 0 0 0 0 0 . .
    AXIS_D0Q0S2A1_S translation detector
                        AXIS_D0Q0S2A1 0 1 0 0 0 0 . .
    AXIS_D0Q0S3_ROT rotation detector
                        AXIS_D0Q0 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q0S3 translation detector
                        AXIS_D0Q0 . . . -23.5499 -34.181125 0.0
                                   359.96513 AXIS_D0Q0S3_ROT
    AXIS_D0Q0S3A0_ROT rotation detector
                        AXIS_D0Q0S3 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S3A0 translation detector
                        AXIS_D0Q0S3 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q0S3A0_ROT
    AXIS_D0Q0S3A0_F translation detector
                        AXIS_D0Q0S3A0 1 0 0 0 0 0 . .
    AXIS_D0Q0S3A0_S translation detector
                        AXIS_D0Q0S3A0 0 1 0 0 0 0 . .
    AXIS_D0Q0S3A1_ROT rotation detector
                        AXIS_D0Q0S3 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S3A1 translation detector
                        AXIS_D0Q0S3 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q0S3A1_ROT
    AXIS_D0Q0S3A1_F translation detector
                        AXIS_D0Q0S3A1 1 0 0 0 0 0 . .
    AXIS_D0Q0S3A1_S translation detector
                        AXIS_D0Q0S3A1 0 1 0 0 0 0 . .
    AXIS_D0Q0S4_ROT rotation detector
                        AXIS_D0Q0 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q0S4 translation detector
                        AXIS_D0Q0 . . . -11.2651 24.282775 0.0
                                   270.14738 AXIS_D0Q0S4_ROT
    AXIS_D0Q0S4A0_ROT rotation detector
                        AXIS_D0Q0S4 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S4A0 translation detector
                        AXIS_D0Q0S4 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q0S4A0_ROT
    AXIS_D0Q0S4A0_F translation detector
                        AXIS_D0Q0S4A0 1 0 0 0 0 0 . .
    AXIS_D0Q0S4A0_S translation detector
                        AXIS_D0Q0S4A0 0 1 0 0 0 0 . .
    AXIS_D0Q0S4A1_ROT rotation detector
                        AXIS_D0Q0S4 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S4A1 translation detector
                        AXIS_D0Q0S4 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q0S4A1_ROT
    AXIS_D0Q0S4A1_F translation detector
                        AXIS_D0Q0S4A1 1 0 0 0 0 0 . .
    AXIS_D0Q0S4A1_S translation detector
                        AXIS_D0Q0S4A1 0 1 0 0 0 0 . .
    AXIS_D0Q0S5_ROT rotation detector
                        AXIS_D0Q0 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q0S5 translation detector
                        AXIS_D0Q0 . . . -34.7336 24.169475 0.0
                                   270.07896 AXIS_D0Q0S5_ROT
    AXIS_D0Q0S5A0_ROT rotation detector
                        AXIS_D0Q0S5 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S5A0 translation detector
                        AXIS_D0Q0S5 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q0S5A0_ROT
    AXIS_D0Q0S5A0_F translation detector
                        AXIS_D0Q0S5A0 1 0 0 0 0 0 . .
    AXIS_D0Q0S5A0_S translation detector
                        AXIS_D0Q0S5A0 0 1 0 0 0 0 . .
    AXIS_D0Q0S5A1_ROT rotation detector
                        AXIS_D0Q0S5 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S5A1 translation detector
                        AXIS_D0Q0S5 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q0S5A1_ROT
    AXIS_D0Q0S5A1_F translation detector
                        AXIS_D0Q0S5A1 1 0 0 0 0 0 . .
    AXIS_D0Q0S5A1_S translation detector
                        AXIS_D0Q0S5A1 0 1 0 0 0 0 . .
    AXIS_D0Q0S6_ROT rotation detector
                        AXIS_D0Q0 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q0S6 translation detector
                        AXIS_D0Q0 . . . 23.5488 33.320375 0.0
                                   359.78222 AXIS_D0Q0S6_ROT
    AXIS_D0Q0S6A0_ROT rotation detector
                        AXIS_D0Q0S6 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S6A0 translation detector
                        AXIS_D0Q0S6 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q0S6A0_ROT
    AXIS_D0Q0S6A0_F translation detector
                        AXIS_D0Q0S6A0 1 0 0 0 0 0 . .
    AXIS_D0Q0S6A0_S translation detector
                        AXIS_D0Q0S6A0 0 1 0 0 0 0 . .
    AXIS_D0Q0S6A1_ROT rotation detector
                        AXIS_D0Q0S6 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S6A1 translation detector
                        AXIS_D0Q0S6 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q0S6A1_ROT
    AXIS_D0Q0S6A1_F translation detector
                        AXIS_D0Q0S6A1 1 0 0 0 0 0 . .
    AXIS_D0Q0S6A1_S translation detector
                        AXIS_D0Q0S6A1 0 1 0 0 0 0 . .
    AXIS_D0Q0S7_ROT rotation detector
                        AXIS_D0Q0 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q0S7 translation detector
                        AXIS_D0Q0 . . . 23.3541 9.829875 0.0
                                   359.89604 AXIS_D0Q0S7_ROT
    AXIS_D0Q0S7A0_ROT rotation detector
                        AXIS_D0Q0S7 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S7A0 translation detector
                        AXIS_D0Q0S7 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q0S7A0_ROT
    AXIS_D0Q0S7A0_F translation detector
                        AXIS_D0Q0S7A0 1 0 0 0 0 0 . .
    AXIS_D0Q0S7A0_S translation detector
                        AXIS_D0Q0S7A0 0 1 0 0 0 0 . .
    AXIS_D0Q0S7A1_ROT rotation detector
                        AXIS_D0Q0S7 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q0S7A1 translation detector
                        AXIS_D0Q0S7 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q0S7A1_ROT
    AXIS_D0Q0S7A1_F translation detector
                        AXIS_D0Q0S7A1 1 0 0 0 0 0 . .
    AXIS_D0Q0S7A1_S translation detector
                        AXIS_D0Q0S7A1 0 1 0 0 0 0 . .
    AXIS_D0Q1_ROT rotation detector
                        AXIS_D0 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1 translation detector
                        AXIS_D0 . . . 41.512521875 50.149653125 0.0
                                   0.0 AXIS_D0Q1_ROT
    AXIS_D0Q1S0_ROT rotation detector
                        AXIS_D0Q1 -0.0 -0.0 -1.0 0 0 0 . .
    AXIS_D0Q1S0 translation detector
                        AXIS_D0Q1 . . . -23.1589875 -11.451825 0.0
                                     0.27238 AXIS_D0Q1S0_ROT
    AXIS_D0Q1S0A0_ROT rotation detector
                        AXIS_D0Q1S0 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S0A0 translation detector
                        AXIS_D0Q1S0 . . . -10.835 0.0 0.0
                                       0.0 AXIS_D0Q1S0A0_ROT
    AXIS_D0Q1S0A0_F translation detector
                        AXIS_D0Q1S0A0 1 0 0 0 0 0 . .
    AXIS_D0Q1S0A0_S translation detector
                        AXIS_D0Q1S0A0 0 1 0 0 0 0 . .
    AXIS_D0Q1S0A1_ROT rotation detector
                        AXIS_D0Q1S0 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S0A1 translation detector
                        AXIS_D0Q1S0 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q1S0A1_ROT
    AXIS_D0Q1S0A1_F translation detector
                        AXIS_D0Q1S0A1 1 0 0 0 0 0 . .
    AXIS_D0Q1S0A1_S translation detector
                        AXIS_D0Q1S0A1 0 1 0 0 0 0 . .
    AXIS_D0Q1S1_ROT rotation detector
                        AXIS_D0Q1 -0.0 -0.0 -1.0 0 0 0 . .
    AXIS_D0Q1S1 translation detector
                        AXIS_D0Q1 . . . -23.2073875 -34.782825 0.0
                                     0.00525999986641 AXIS_D0Q1S1_ROT
    AXIS_D0Q1S1A0_ROT rotation detector
                        AXIS_D0Q1S1 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S1A0 translation detector
                        AXIS_D0Q1S1 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q1S1A0_ROT
    AXIS_D0Q1S1A0_F translation detector
                        AXIS_D0Q1S1A0 1 0 0 0 0 0 . .
    AXIS_D0Q1S1A0_S translation detector
                        AXIS_D0Q1S1A0 0 1 0 0 0 0 . .
    AXIS_D0Q1S1A1_ROT rotation detector
                        AXIS_D0Q1S1 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S1A1 translation detector
                        AXIS_D0Q1S1 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q1S1A1_ROT
    AXIS_D0Q1S1A1_F translation detector
                        AXIS_D0Q1S1A1 1 0 0 0 0 0 . .
    AXIS_D0Q1S1A1_S translation detector
                        AXIS_D0Q1S1A1 0 1 0 0 0 0 . .
    AXIS_D0Q1S2_ROT rotation detector
                        AXIS_D0Q1 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q1S2 translation detector
                        AXIS_D0Q1 . . . -10.7311875 23.286175 0.0
                                   270.02545 AXIS_D0Q1S2_ROT
    AXIS_D0Q1S2A0_ROT rotation detector
                        AXIS_D0Q1S2 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S2A0 translation detector
                        AXIS_D0Q1S2 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q1S2A0_ROT
    AXIS_D0Q1S2A0_F translation detector
                        AXIS_D0Q1S2A0 1 0 0 0 0 0 . .
    AXIS_D0Q1S2A0_S translation detector
                        AXIS_D0Q1S2A0 0 1 0 0 0 0 . .
    AXIS_D0Q1S2A1_ROT rotation detector
                        AXIS_D0Q1S2 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S2A1 translation detector
                        AXIS_D0Q1S2 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q1S2A1_ROT
    AXIS_D0Q1S2A1_F translation detector
                        AXIS_D0Q1S2A1 1 0 0 0 0 0 . .
    AXIS_D0Q1S2A1_S translation detector
                        AXIS_D0Q1S2A1 0 1 0 0 0 0 . .
    AXIS_D0Q1S3_ROT rotation detector
                        AXIS_D0Q1 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q1S3 translation detector
                        AXIS_D0Q1 . . . -34.1402875 23.344475 0.0
                                   270.03066 AXIS_D0Q1S3_ROT
    AXIS_D0Q1S3A0_ROT rotation detector
                        AXIS_D0Q1S3 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S3A0 translation detector
                        AXIS_D0Q1S3 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q1S3A0_ROT
    AXIS_D0Q1S3A0_F translation detector
                        AXIS_D0Q1S3A0 1 0 0 0 0 0 . .
    AXIS_D0Q1S3A0_S translation detector
                        AXIS_D0Q1S3A0 0 1 0 0 0 0 . .
    AXIS_D0Q1S3A1_ROT rotation detector
                        AXIS_D0Q1S3 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S3A1 translation detector
                        AXIS_D0Q1S3 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q1S3A1_ROT
    AXIS_D0Q1S3A1_F translation detector
                        AXIS_D0Q1S3A1 1 0 0 0 0 0 . .
    AXIS_D0Q1S3A1_S translation detector
                        AXIS_D0Q1S3A1 0 1 0 0 0 0 . .
    AXIS_D0Q1S4_ROT rotation detector
                        AXIS_D0Q1 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q1S4 translation detector
                        AXIS_D0Q1 . . . 24.0035125 11.407275 0.0
                                    179.96381 AXIS_D0Q1S4_ROT
    AXIS_D0Q1S4A0_ROT rotation detector
                        AXIS_D0Q1S4 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S4A0 translation detector
                        AXIS_D0Q1S4 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q1S4A0_ROT
    AXIS_D0Q1S4A0_F translation detector
                        AXIS_D0Q1S4A0 1 0 0 0 0 0 . .
    AXIS_D0Q1S4A0_S translation detector
                        AXIS_D0Q1S4A0 0 1 0 0 0 0 . .
    AXIS_D0Q1S4A1_ROT rotation detector
                        AXIS_D0Q1S4 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S4A1 translation detector
                        AXIS_D0Q1S4 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q1S4A1_ROT
    AXIS_D0Q1S4A1_F translation detector
                        AXIS_D0Q1S4A1 1 0 0 0 0 0 . .
    AXIS_D0Q1S4A1_S translation detector
                        AXIS_D0Q1S4A1 0 1 0 0 0 0 . .
    AXIS_D0Q1S5_ROT rotation detector
                        AXIS_D0Q1 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q1S5 translation detector
                        AXIS_D0Q1 . . . 24.0035125 34.876875 0.0
                                   180.02434 AXIS_D0Q1S5_ROT
    AXIS_D0Q1S5A0_ROT rotation detector
                        AXIS_D0Q1S5 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S5A0 translation detector
                        AXIS_D0Q1S5 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q1S5A0_ROT
    AXIS_D0Q1S5A0_F translation detector
                        AXIS_D0Q1S5A0 1 0 0 0 0 0 . .
    AXIS_D0Q1S5A0_S translation detector
                        AXIS_D0Q1S5A0 0 1 0 0 0 0 . .
    AXIS_D0Q1S5A1_ROT rotation detector
                        AXIS_D0Q1S5 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S5A1 translation detector
                        AXIS_D0Q1S5 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q1S5A1_ROT
    AXIS_D0Q1S5A1_F translation detector
                        AXIS_D0Q1S5A1 1 0 0 0 0 0 . .
    AXIS_D0Q1S5A1_S translation detector
                        AXIS_D0Q1S5A1 0 1 0 0 0 0 . .
    AXIS_D0Q1S6_ROT rotation detector
                        AXIS_D0Q1 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q1S6 translation detector
                        AXIS_D0Q1 . . . 33.2523125 -23.321925 0.0
                                   270.08027 AXIS_D0Q1S6_ROT
    AXIS_D0Q1S6A0_ROT rotation detector
                        AXIS_D0Q1S6 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S6A0 translation detector
                        AXIS_D0Q1S6 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q1S6A0_ROT
    AXIS_D0Q1S6A0_F translation detector
                        AXIS_D0Q1S6A0 1 0 0 0 0 0 . .
    AXIS_D0Q1S6A0_S translation detector
                        AXIS_D0Q1S6A0 0 1 0 0 0 0 . .
    AXIS_D0Q1S6A1_ROT rotation detector
                        AXIS_D0Q1S6 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S6A1 translation detector
                        AXIS_D0Q1S6 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q1S6A1_ROT
    AXIS_D0Q1S6A1_F translation detector
                        AXIS_D0Q1S6A1 1 0 0 0 0 0 . .
    AXIS_D0Q1S6A1_S translation detector
                        AXIS_D0Q1S6A1 0 1 0 0 0 0 . .
    AXIS_D0Q1S7_ROT rotation detector
                        AXIS_D0Q1 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q1S7 translation detector
                        AXIS_D0Q1 . . . 9.9785125 -23.358225 0.0
                                   270.15067 AXIS_D0Q1S7_ROT
    AXIS_D0Q1S7A0_ROT rotation detector
                        AXIS_D0Q1S7 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S7A0 translation detector
                        AXIS_D0Q1S7 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q1S7A0_ROT
    AXIS_D0Q1S7A0_F translation detector
                        AXIS_D0Q1S7A0 1 0 0 0 0 0 . .
    AXIS_D0Q1S7A0_S translation detector
                        AXIS_D0Q1S7A0 0 1 0 0 0 0 . .
    AXIS_D0Q1S7A1_ROT rotation detector
                        AXIS_D0Q1S7 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q1S7A1 translation detector
                        AXIS_D0Q1S7 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q1S7A1_ROT
    AXIS_D0Q1S7A1_F translation detector
                        AXIS_D0Q1S7A1 1 0 0 0 0 0 . .
    AXIS_D0Q1S7A1_S translation detector
                        AXIS_D0Q1S7A1 0 1 0 0 0 0 . .
    AXIS_D0Q2_ROT rotation detector
                        AXIS_D0 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2 translation detector
                        AXIS_D0 . . . 49.596146875 -41.351371875 0.0
                                   0.0 AXIS_D0Q2_ROT
    AXIS_D0Q2S0_ROT rotation detector
                        AXIS_D0Q2 -0.0 -0.0 -1.0 0 0 0 . .
    AXIS_D0Q2S0 translation detector
                        AXIS_D0Q2 . . . -11.3150125 23.1242 0.0
                                    90.04803 AXIS_D0Q2S0_ROT
    AXIS_D0Q2S0A0_ROT rotation detector
                        AXIS_D0Q2S0 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S0A0 translation detector
                        AXIS_D0Q2S0 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q2S0A0_ROT
    AXIS_D0Q2S0A0_F translation detector
                        AXIS_D0Q2S0A0 1 0 0 0 0 0 . .
    AXIS_D0Q2S0A0_S translation detector
                        AXIS_D0Q2S0A0 0 1 0 0 0 0 . .
    AXIS_D0Q2S0A1_ROT rotation detector
                        AXIS_D0Q2S0 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S0A1 translation detector
                        AXIS_D0Q2S0 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q2S0A1_ROT
    AXIS_D0Q2S0A1_F translation detector
                        AXIS_D0Q2S0A1 1 0 0 0 0 0 . .
    AXIS_D0Q2S0A1_S translation detector
                        AXIS_D0Q2S0A1 0 1 0 0 0 0 . .
    AXIS_D0Q2S1_ROT rotation detector
                        AXIS_D0Q2 -0.0 -0.0 -1.0 0 0 0 . .
    AXIS_D0Q2S1 translation detector
                        AXIS_D0Q2 . . . -34.6999125 23.155 0.0
                                    90.00592 AXIS_D0Q2S1_ROT
    AXIS_D0Q2S1A0_ROT rotation detector
                        AXIS_D0Q2S1 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S1A0 translation detector
                        AXIS_D0Q2S1 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q2S1A0_ROT
    AXIS_D0Q2S1A0_F translation detector
                        AXIS_D0Q2S1A0 1 0 0 0 0 0 . .
    AXIS_D0Q2S1A0_S translation detector
                        AXIS_D0Q2S1A0 0 1 0 0 0 0 . .
    AXIS_D0Q2S1A1_ROT rotation detector
                        AXIS_D0Q2S1 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S1A1 translation detector
                        AXIS_D0Q2S1 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q2S1A1_ROT
    AXIS_D0Q2S1A1_F translation detector
                        AXIS_D0Q2S1A1 1 0 0 0 0 0 . .
    AXIS_D0Q2S1A1_S translation detector
                        AXIS_D0Q2S1A1 0 1 0 0 0 0 . .
    AXIS_D0Q2S2_ROT rotation detector
                        AXIS_D0Q2 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q2S2 translation detector
                        AXIS_D0Q2 . . . 23.4746875 10.7811 0.0
                                    180.11318 AXIS_D0Q2S2_ROT
    AXIS_D0Q2S2A0_ROT rotation detector
                        AXIS_D0Q2S2 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S2A0 translation detector
                        AXIS_D0Q2S2 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q2S2A0_ROT
    AXIS_D0Q2S2A0_F translation detector
                        AXIS_D0Q2S2A0 1 0 0 0 0 0 . .
    AXIS_D0Q2S2A0_S translation detector
                        AXIS_D0Q2S2A0 0 1 0 0 0 0 . .
    AXIS_D0Q2S2A1_ROT rotation detector
                        AXIS_D0Q2S2 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S2A1 translation detector
                        AXIS_D0Q2S2 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q2S2A1_ROT
    AXIS_D0Q2S2A1_F translation detector
                        AXIS_D0Q2S2A1 1 0 0 0 0 0 . .
    AXIS_D0Q2S2A1_S translation detector
                        AXIS_D0Q2S2A1 0 1 0 0 0 0 . .
    AXIS_D0Q2S3_ROT rotation detector
                        AXIS_D0Q2 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q2S3 translation detector
                        AXIS_D0Q2 . . . 23.6220875 34.2221 0.0
                                   179.92104 AXIS_D0Q2S3_ROT
    AXIS_D0Q2S3A0_ROT rotation detector
                        AXIS_D0Q2S3 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S3A0 translation detector
                        AXIS_D0Q2S3 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q2S3A0_ROT
    AXIS_D0Q2S3A0_F translation detector
                        AXIS_D0Q2S3A0 1 0 0 0 0 0 . .
    AXIS_D0Q2S3A0_S translation detector
                        AXIS_D0Q2S3A0 0 1 0 0 0 0 . .
    AXIS_D0Q2S3A1_ROT rotation detector
                        AXIS_D0Q2S3 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S3A1 translation detector
                        AXIS_D0Q2S3 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q2S3A1_ROT
    AXIS_D0Q2S3A1_F translation detector
                        AXIS_D0Q2S3A1 1 0 0 0 0 0 . .
    AXIS_D0Q2S3A1_S translation detector
                        AXIS_D0Q2S3A1 0 1 0 0 0 0 . .
    AXIS_D0Q2S4_ROT rotation detector
                        AXIS_D0Q2 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q2S4 translation detector
                        AXIS_D0Q2 . . . 11.1953875 -23.9954 0.0
                                      89.63875 AXIS_D0Q2S4_ROT
    AXIS_D0Q2S4A0_ROT rotation detector
                        AXIS_D0Q2S4 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S4A0 translation detector
                        AXIS_D0Q2S4 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q2S4A0_ROT
    AXIS_D0Q2S4A0_F translation detector
                        AXIS_D0Q2S4A0 1 0 0 0 0 0 . .
    AXIS_D0Q2S4A0_S translation detector
                        AXIS_D0Q2S4A0 0 1 0 0 0 0 . .
    AXIS_D0Q2S4A1_ROT rotation detector
                        AXIS_D0Q2S4 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S4A1 translation detector
                        AXIS_D0Q2S4 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q2S4A1_ROT
    AXIS_D0Q2S4A1_F translation detector
                        AXIS_D0Q2S4A1 1 0 0 0 0 0 . .
    AXIS_D0Q2S4A1_S translation detector
                        AXIS_D0Q2S4A1 0 1 0 0 0 0 . .
    AXIS_D0Q2S5_ROT rotation detector
                        AXIS_D0Q2 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q2S5 translation detector
                        AXIS_D0Q2 . . . 34.5494875 -24.1901 0.0
                                    89.68154 AXIS_D0Q2S5_ROT
    AXIS_D0Q2S5A0_ROT rotation detector
                        AXIS_D0Q2S5 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S5A0 translation detector
                        AXIS_D0Q2S5 . . . -10.835 0.0 0.0
                                       0.0 AXIS_D0Q2S5A0_ROT
    AXIS_D0Q2S5A0_F translation detector
                        AXIS_D0Q2S5A0 1 0 0 0 0 0 . .
    AXIS_D0Q2S5A0_S translation detector
                        AXIS_D0Q2S5A0 0 1 0 0 0 0 . .
    AXIS_D0Q2S5A1_ROT rotation detector
                        AXIS_D0Q2S5 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S5A1 translation detector
                        AXIS_D0Q2S5 . . . 10.835 0.0 0.0
                                       0.0 AXIS_D0Q2S5A1_ROT
    AXIS_D0Q2S5A1_F translation detector
                        AXIS_D0Q2S5A1 1 0 0 0 0 0 . .
    AXIS_D0Q2S5A1_S translation detector
                        AXIS_D0Q2S5A1 0 1 0 0 0 0 . .
    AXIS_D0Q2S6_ROT rotation detector
                        AXIS_D0Q2 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q2S6 translation detector
                        AXIS_D0Q2 . . . -23.4854125 -33.2552 0.0
                                   179.83473 AXIS_D0Q2S6_ROT
    AXIS_D0Q2S6A0_ROT rotation detector
                        AXIS_D0Q2S6 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S6A0 translation detector
                        AXIS_D0Q2S6 . . . -10.835 0.0 0.0
                                       0.0 AXIS_D0Q2S6A0_ROT
    AXIS_D0Q2S6A0_F translation detector
                        AXIS_D0Q2S6A0 1 0 0 0 0 0 . .
    AXIS_D0Q2S6A0_S translation detector
                        AXIS_D0Q2S6A0 0 1 0 0 0 0 . .
    AXIS_D0Q2S6A1_ROT rotation detector
                        AXIS_D0Q2S6 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S6A1 translation detector
                        AXIS_D0Q2S6 . . . 10.835 0.0 0.0
                                       0.0 AXIS_D0Q2S6A1_ROT
    AXIS_D0Q2S6A1_F translation detector
                        AXIS_D0Q2S6A1 1 0 0 0 0 0 . .
    AXIS_D0Q2S6A1_S translation detector
                        AXIS_D0Q2S6A1 0 1 0 0 0 0 . .
    AXIS_D0Q2S7_ROT rotation detector
                        AXIS_D0Q2 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q2S7 translation detector
                        AXIS_D0Q2 . . . -23.3413125 -9.8417 0.0
                                   180.092 AXIS_D0Q2S7_ROT
    AXIS_D0Q2S7A0_ROT rotation detector
                        AXIS_D0Q2S7 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S7A0 translation detector
                        AXIS_D0Q2S7 . . . -10.835 0.0 0.0
                                       0.0 AXIS_D0Q2S7A0_ROT
    AXIS_D0Q2S7A0_F translation detector
                        AXIS_D0Q2S7A0 1 0 0 0 0 0 . .
    AXIS_D0Q2S7A0_S translation detector
                        AXIS_D0Q2S7A0 0 1 0 0 0 0 . .
    AXIS_D0Q2S7A1_ROT rotation detector
                        AXIS_D0Q2S7 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q2S7A1 translation detector
                        AXIS_D0Q2S7 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q2S7A1_ROT
    AXIS_D0Q2S7A1_F translation detector
                        AXIS_D0Q2S7A1 1 0 0 0 0 0 . .
    AXIS_D0Q2S7A1_S translation detector
                        AXIS_D0Q2S7A1 0 1 0 0 0 0 . .
    AXIS_D0Q3_ROT rotation detector
                        AXIS_D0 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3 translation detector
                        AXIS_D0 . . . -41.247903125 -50.441634375 0.0
                                   0.0 AXIS_D0Q3_ROT
    AXIS_D0Q3S0_ROT rotation detector
                        AXIS_D0Q3 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q3S0 translation detector
                        AXIS_D0Q3 . . . 23.1056375 11.6367625 0.0
                                   180.12436 AXIS_D0Q3S0_ROT
    AXIS_D0Q3S0A0_ROT rotation detector
                        AXIS_D0Q3S0 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S0A0 translation detector
                        AXIS_D0Q3S0 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q3S0A0_ROT
    AXIS_D0Q3S0A0_F translation detector
                        AXIS_D0Q3S0A0 1 0 0 0 0 0 . .
    AXIS_D0Q3S0A0_S translation detector
                        AXIS_D0Q3S0A0 0 1 0 0 0 0 . .
    AXIS_D0Q3S0A1_ROT rotation detector
                        AXIS_D0Q3S0 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S0A1 translation detector
                        AXIS_D0Q3S0 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q3S0A1_ROT
    AXIS_D0Q3S0A1_F translation detector
                        AXIS_D0Q3S0A1 1 0 0 0 0 0 . .
    AXIS_D0Q3S0A1_S translation detector
                        AXIS_D0Q3S0A1 0 1 0 0 0 0 . .
    AXIS_D0Q3S1_ROT rotation detector
                        AXIS_D0Q3 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q3S1 translation detector
                        AXIS_D0Q3 . . . 23.1298375 34.9864625 0.0
                                   180.00263 AXIS_D0Q3S1_ROT
    AXIS_D0Q3S1A0_ROT rotation detector
                        AXIS_D0Q3S1 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S1A0 translation detector
                        AXIS_D0Q3S1 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q3S1A0_ROT
    AXIS_D0Q3S1A0_F translation detector
                        AXIS_D0Q3S1A0 1 0 0 0 0 0 . .
    AXIS_D0Q3S1A0_S translation detector
                        AXIS_D0Q3S1A0 0 1 0 0 0 0 . .
    AXIS_D0Q3S1A1_ROT rotation detector
                        AXIS_D0Q3S1 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S1A1 translation detector
                        AXIS_D0Q3S1 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q3S1A1_ROT
    AXIS_D0Q3S1A1_F translation detector
                        AXIS_D0Q3S1A1 1 0 0 0 0 0 . .
    AXIS_D0Q3S1A1_S translation detector
                        AXIS_D0Q3S1A1 0 1 0 0 0 0 . .
    AXIS_D0Q3S2_ROT rotation detector
                        AXIS_D0Q3 -0.0 -0.0 -1.0 0 0 0 . .
    AXIS_D0Q3S2 translation detector
                        AXIS_D0Q3 . . . 10.9572375 -23.5830375 0.0
                                   269.55191 AXIS_D0Q3S2_ROT
    AXIS_D0Q3S2A0_ROT rotation detector
                        AXIS_D0Q3S2 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S2A0 translation detector
                        AXIS_D0Q3S2 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q3S2A0_ROT
    AXIS_D0Q3S2A0_F translation detector
                        AXIS_D0Q3S2A0 1 0 0 0 0 0 . .
    AXIS_D0Q3S2A0_S translation detector
                        AXIS_D0Q3S2A0 0 1 0 0 0 0 . .
    AXIS_D0Q3S2A1_ROT rotation detector
                        AXIS_D0Q3S2 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S2A1 translation detector
                        AXIS_D0Q3S2 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q3S2A1_ROT
    AXIS_D0Q3S2A1_F translation detector
                        AXIS_D0Q3S2A1 1 0 0 0 0 0 . .
    AXIS_D0Q3S2A1_S translation detector
                        AXIS_D0Q3S2A1 0 1 0 0 0 0 . .
    AXIS_D0Q3S3_ROT rotation detector
                        AXIS_D0Q3 -0.0 -0.0 -1.0 0 0 0 . .
    AXIS_D0Q3S3 translation detector
                        AXIS_D0Q3 . . . 34.4180375 -23.4818375 0.0
                                   269.74206 AXIS_D0Q3S3_ROT
    AXIS_D0Q3S3A0_ROT rotation detector
                        AXIS_D0Q3S3 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S3A0 translation detector
                        AXIS_D0Q3S3 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q3S3A0_ROT
    AXIS_D0Q3S3A0_F translation detector
                        AXIS_D0Q3S3A0 1 0 0 0 0 0 . .
    AXIS_D0Q3S3A0_S translation detector
                        AXIS_D0Q3S3A0 0 1 0 0 0 0 . .
    AXIS_D0Q3S3A1_ROT rotation detector
                        AXIS_D0Q3S3 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S3A1 translation detector
                        AXIS_D0Q3S3 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q3S3A1_ROT
    AXIS_D0Q3S3A1_F translation detector
                        AXIS_D0Q3S3A1 1 0 0 0 0 0 . .
    AXIS_D0Q3S3A1_S translation detector
                        AXIS_D0Q3S3A1 0 1 0 0 0 0 . .
    AXIS_D0Q3S4_ROT rotation detector
                        AXIS_D0Q3 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q3S4 translation detector
                        AXIS_D0Q3 . . . -24.1283625 -11.5336375 0.0
                                   359.81971 AXIS_D0Q3S4_ROT
    AXIS_D0Q3S4A0_ROT rotation detector
                        AXIS_D0Q3S4 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S4A0 translation detector
                        AXIS_D0Q3S4 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q3S4A0_ROT
    AXIS_D0Q3S4A0_F translation detector
                        AXIS_D0Q3S4A0 1 0 0 0 0 0 . .
    AXIS_D0Q3S4A0_S translation detector
                        AXIS_D0Q3S4A0 0 1 0 0 0 0 . .
    AXIS_D0Q3S4A1_ROT rotation detector
                        AXIS_D0Q3S4 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S4A1 translation detector
                        AXIS_D0Q3S4 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q3S4A1_ROT
    AXIS_D0Q3S4A1_F translation detector
                        AXIS_D0Q3S4A1 1 0 0 0 0 0 . .
    AXIS_D0Q3S4A1_S translation detector
                        AXIS_D0Q3S4A1 0 1 0 0 0 0 . .
    AXIS_D0Q3S5_ROT rotation detector
                        AXIS_D0Q3 0.0 0.0 1.0 0 0 0 . .
    AXIS_D0Q3S5 translation detector
                        AXIS_D0Q3 . . . -24.1701625 -34.9548375 0.0
                                   359.99883 AXIS_D0Q3S5_ROT
    AXIS_D0Q3S5A0_ROT rotation detector
                        AXIS_D0Q3S5 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S5A0 translation detector
                        AXIS_D0Q3S5 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q3S5A0_ROT
    AXIS_D0Q3S5A0_F translation detector
                        AXIS_D0Q3S5A0 1 0 0 0 0 0 . .
    AXIS_D0Q3S5A0_S translation detector
                        AXIS_D0Q3S5A0 0 1 0 0 0 0 . .
    AXIS_D0Q3S5A1_ROT rotation detector
                        AXIS_D0Q3S5 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S5A1 translation detector
                        AXIS_D0Q3S5 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q3S5A1_ROT
    AXIS_D0Q3S5A1_F translation detector
                        AXIS_D0Q3S5A1 1 0 0 0 0 0 . .
    AXIS_D0Q3S5A1_S translation detector
                        AXIS_D0Q3S5A1 0 1 0 0 0 0 . .
    AXIS_D0Q3S6_ROT rotation detector
                        AXIS_D0Q3 -0.0 -0.0 -1.0 0 0 0 . .
    AXIS_D0Q3S6 translation detector
                        AXIS_D0Q3 . . . -33.3089625 23.4474625 0.0
                                   269.67299 AXIS_D0Q3S6_ROT
    AXIS_D0Q3S6A0_ROT rotation detector
                        AXIS_D0Q3S6 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S6A0 translation detector
                        AXIS_D0Q3S6 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q3S6A0_ROT
    AXIS_D0Q3S6A0_F translation detector
                        AXIS_D0Q3S6A0 1 0 0 0 0 0 . .
    AXIS_D0Q3S6A0_S translation detector
                        AXIS_D0Q3S6A0 0 1 0 0 0 0 . .
    AXIS_D0Q3S6A1_ROT rotation detector
                        AXIS_D0Q3S6 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S6A1 translation detector
                        AXIS_D0Q3S6 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q3S6A1_ROT
    AXIS_D0Q3S6A1_F translation detector
                        AXIS_D0Q3S6A1 1 0 0 0 0 0 . .
    AXIS_D0Q3S6A1_S translation detector
                        AXIS_D0Q3S6A1 0 1 0 0 0 0 . .
    AXIS_D0Q3S7_ROT rotation detector
                        AXIS_D0Q3 -0.0 -0.0 -1.0 0 0 0 . .
    AXIS_D0Q3S7 translation detector
                        AXIS_D0Q3 . . . -10.0032625 23.4826625 0.0
                                   269.67561 AXIS_D0Q3S7_ROT
    AXIS_D0Q3S7A0_ROT rotation detector
                        AXIS_D0Q3S7 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S7A0 translation detector
                        AXIS_D0Q3S7 . . . -10.835 0.0 0.0 0.0 AXIS_D0Q3S7A0_ROT
    AXIS_D0Q3S7A0_F translation detector
                        AXIS_D0Q3S7A0 1 0 0 0 0 0 . .
    AXIS_D0Q3S7A0_S translation detector
                        AXIS_D0Q3S7A0 0 1 0 0 0 0 . .
    AXIS_D0Q3S7A1_ROT rotation detector
                        AXIS_D0Q3S7 0.0 0.0 0.0 0 0 0 . .
    AXIS_D0Q3S7A1 translation detector
                        AXIS_D0Q3S7 . . . 10.835 0.0 0.0 0.0 AXIS_D0Q3S7A1_ROT
    AXIS_D0Q3S7A1_F translation detector
                        AXIS_D0Q3S7A1 1 0 0 0 0 0 . .
    AXIS_D0Q3S7A1_S translation detector
                        AXIS_D0Q3S7A1 0 1 0 0 0 0 . .
   
;
   
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     save_


save__axis.depends_on
    _item_description.description
;             The value of _axis.depends_on specifies the next outermost
              axis upon which this axis depends, unless
              _axis.rotation_axis is
              specified, in which case, _axis.rotation_axis is
              next outermost and _axis.depends_on is second
              outermost.

              This item is a pointer to _axis.id in the same category.
;
    _item.name                      '_axis.depends_on'
    _item.category_id                 axis
    _item.mandatory_code              no

     save_


save__axis.equipment
    _item_description.description
;             The value of  _axis.equipment specifies the type of
              equipment using the axis:  'goniometer', 'detector',
              'gravity', 'source' or 'general'.
;
    _item.name                      '_axis.equipment'
    _item.category_id                 axis
    _item.mandatory_code              implicit
    _item_type.code                   ucode
    _item_default.value               general
     loop_
    _item_enumeration.value
    _item_enumeration.detail   goniometer
                              'equipment used to orient or position samples'
                               detector
                              'equipment used to detect reflections'
                               general
                              'equipment used for general purposes'
                               gravity
                              'axis specifying the downward direction'
                               source
                              'axis specifying the direction sample to source'

     save_

save__axis.equipment_component
    _item_description.description
;             The value of  _axis.equipment_component specifies
              an arbitrary identifier of a component of the equipment to which
              the axis belongs, such as 'detector_arm' or 'detector_module'.

;
    _item.name                      '_axis.equipment_component'
    _item.category_id                 axis
    _item.mandatory_code              no
    _item_type.code                   ucode

     save_



save__axis.offset[1]
    _item_description.description
;              The [1] element of the three-element vector used to specify
               the offset to the base of a rotation or translation axis.

               The vector is specified in millimetres.
;
    _item.name                  '_axis.offset[1]'
    _item.category_id             axis
    _item.mandatory_code          no
    _item_default.value           0.0
    _item_sub_category.id         vector
    _item_type.code               float
    _item_units.code              millimetres
     save_


save__axis.offset[2]
    _item_description.description
;              The [2] element of the three-element vector used to specify
               the offset to the base of a rotation or translation axis.

               The vector is specified in millimetres.
;
    _item.name                  '_axis.offset[2]'
    _item.category_id             axis
    _item.mandatory_code          no
    _item_default.value           0.0
    _item_sub_category.id         vector
    _item_type.code               float
    _item_units.code              millimetres
     save_


save__axis.offset[3]
    _item_description.description
;              The [3] element of the three-element vector used to specify
               the offset to the base of a rotation or translation axis.

               The vector is specified in millimetres.
;
    _item.name                  '_axis.offset[3]'
    _item.category_id             axis
    _item.mandatory_code          no
    _item_default.value           0.0
    _item_sub_category.id         vector
    _item_type.code               float
    _item_units.code              millimetres
     save_


save__axis.id
    _item_description.description
;             The value of _axis.id must uniquely identify
              each axis relevant to the experiment.  Note that multiple
              pieces of equipment may share the same axis (e.g. a twotheta
              arm), so the category key for AXIS also includes the
              equipment.
;

     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
         '_axis.id'                         axis                    yes
         '_array_structure_list_axis.axis_id'
                                            array_structure_list_axis
                                                                    yes
         '_diffrn_detector_axis.axis_id'    diffrn_detector_axis    yes
         '_diffrn_measurement_axis.axis_id' diffrn_measurement_axis yes
         '_diffrn_scan_axis.axis_id'        diffrn_scan_axis        yes
         '_diffrn_scan_frame_axis.axis_id'  diffrn_scan_frame_axis  yes

    _item_type.code               code
     loop_
    _item_linked.child_name
    _item_linked.parent_name
         '_axis.depends_on'                   '_axis.id'
         '_array_structure_list_axis.axis_id' '_axis.id'
         '_diffrn_detector_axis.axis_id'      '_axis.id'
         '_diffrn_measurement_axis.axis_id'   '_axis.id'
         '_diffrn_scan_axis.axis_id'          '_axis.id'
         '_diffrn_scan_frame_axis.axis_id'    '_axis.id'

     save_
   
save__axis.rotation
    _item_description.description
;             The value of _axis.rotation specifies
              the fixed base rotation angle for _axis.rotation_axis
              to which the value of any frame-by-frame setting, if any, should
              be added.  Normally, ony the fixed value would be given.
;

    _item.name                      '_axis.rotation'
    _item.category_id                 axis
    _item.mandatory_code              no
    _item_default.value               0.0
    _item_type.code                   float
    _item_units.code                  degrees
   
     save_

save__axis.rotation_axis
    _item_description.description
;             The value of _axis.rotation_axis specifies
              an optional addtional dependency for this axis to be applied
              after applying _axis.depends_on.
   
              This item is a pointer to _axis.id in the same category.
;
    _item.name                      '_axis.rotation_axis'
    _item.category_id                 axis
    _item.mandatory_code              no
    _item_type.code                   ucode
   
     save_


save__axis.system
    _item_description.description
;             The value of  _axis.system specifies the coordinate
              system used to define the axis: 'laboratory', 'McStas', 'direct',
              'orthogonal', 'reciprocal' or 'abstract'.
;
    _item.name                      '_axis.system'
    _item.category_id                 axis
    _item.mandatory_code              no
    _item_type.code                   ucode
    _item_default.value               laboratory
     loop_
    _item_enumeration.value
    _item_enumeration.detail  

laboratory
;  the axis is referenced to the imgCIF standard laboratory Cartesian
   coordinate system
;

McStas
;  the axis is referenced to the NeXus/HDF5 McStas laboratory Cartesian
   coordinare system
;

direct
;  the axis is referenced to the direct lattice
;

orthogonal
;  the axis is referenced to the cell Cartesian orthogonal coordinates
;

reciprocal
;  the axis is referenced to the reciprocal lattice
;

abstract
;  the axis is referenced to abstract Cartesian cooridinate system
;

     save_


save__axis.type
    _item_description.description
;             The value of _axis.type specifies the type of
              axis:  'rotation' or 'translation' (or 'general' when
              the type is not relevant, as for gravity).
;
    _item.name                      '_axis.type'
    _item.category_id                 axis
    _item.mandatory_code              no
    _item_type.code                   ucode
    _item_default.value               general
     loop_
    _item_enumeration.value
    _item_enumeration.detail      rotation
                                 'right-handed axis of rotation'
                                  translation
                                 'translation in the direction of the axis'
                                  general
                                 'axis for which the type is not relevant'

     save_


save__axis.vector[1]
    _item_description.description
;              The [1] element of the three-element vector used to specify
               the direction of a rotation or translation axis.
               The vector should be normalized to be a unit vector and
               is dimensionless.
;
    _item.name                  '_axis.vector[1]'
    _item.category_id             axis
    _item.mandatory_code          no
    _item_default.value           0.0
    _item_sub_category.id         vector
    _item_type.code               float
     save_

save__axis.vector[2]
    _item_description.description
;              The [2] element of the three-element vector used to specify
               the direction of a rotation or translation axis.
               The vector should be normalized to be a unit vector and
               is dimensionless.
;
    _item.name                  '_axis.vector[2]'
    _item.category_id             axis
    _item.mandatory_code          no
    _item_default.value           0.0
    _item_sub_category.id         vector
    _item_type.code               float
     save_

save__axis.vector[3]
    _item_description.description
;              The [3] element of the three-element vector used to specify
               the direction of a rotation or translation axis.
               The vector should be normalized to be a unit vector and
               is dimensionless.
;
    _item.name                  '_axis.vector[3]'
    _item.category_id             axis
    _item.mandatory_code          no
    _item_default.value           0.0
    _item_sub_category.id         vector
    _item_type.code               float
     save_

save__axis.variant
    _item_description.description
;             The value of _axis.variant gives the variant
              to which the given AXIS row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_axis.variant'
    _item.category_id             axis
    _item.mandatory_code          implicit
    _item_type.code               code
     save_



#####################
# DIFFRN_DATA_FRAME #
#####################


save_diffrn_data_frame
    _category.description
;             Data items in the DIFFRN_DATA_FRAME category record
              the details about each frame of data.

              The items in this category were previously in a
              DIFFRN_FRAME_DATA category, which is now deprecated.
              The items from the old category are provided
              as aliases but should not be used for new work.
;
    _category.id                   diffrn_data_frame
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _diffrn_data_frame.array_id ARRAYID
    _diffrn_data_frame.array_section_id SECTIONID
    _diffrn_data_frame.binary_id BINID
    _diffrn_data_frame.center_fast CENF
    _diffrn_data_frame.center_slow CENS
    _diffrn_data_frame.center_units UNITS
    _diffrn_data_frame.detector_element_id ELEMENTID
    _diffrn_data_frame.id FRAMEID
    _diffrn_data_frame.details DETAILS

    -->
   
    /entry:NXentry
      /instrument:NXinstrument
       /DETECTORNAME:NXdetector_group
       /DETECTORELEMENTNAME:NXdetector
          /CBF_diffrn_data_frame__section_id=[SECTIONIDARRAY]
          /CBF_diffrn_data_frame__binary_id=[BINARYIDARRAY]
          /CBF_diffrn_data_frame__center_fast_slow=[CENTERARRAY]
            @units="UNITS"
          /CBF_diffrn_data_frame__details=["DETAILSARRAY"]

    inserts either ARRAYID (if not SECTIONID is specified or the SECTIONID
    into the element of SECTIONIDARRY for this frame and for this detector element (see below)

    inserts BINID
    into the element of BINARYIDARRAY for this frame and for this detector element (see below)

    inserts CENF
    into the element of CENTERARRAY for this frame, for this detector element
    and for the fast center (see below)

    inserts CENS
    into element of CENTERARRAY for this frame, for this detector element
    and for the slow center (see below)

    only one CENTERARRY unit is provided.  If there is variation, the values in
    CENTERARRAY should be rescaled to uniform units.

    _diffrn_data_frame.detector_element_id ELEMENTID -->
    ELEMENTID used to index into the arrays of this category by the ordinal of
    the matching ELEMENTID in DIFFRN_DETECTOR_ELEMENT__id for the fast index
   
    FRAMEID used to index into the arrays of this category by the ordinal of
    the matching ELEMENTID in DIFFRN_DETECTOR_ELEMENT__id for the slow index
    by matching FRAMEID against _diffrn_scan_frame.frame_id and using
    _diffrn_scan_frame.frame_number from the same row.
   
    inserts DETAILS
    into the element of DETAILSARRAY for this frame and for this detector element (see below)

    The arrays created in the mapping have a slow index of the number of frames
    and a fast index of the number of detector elements.  There is a middle index
    for CENTERARRAY in the order fast and then slow.

;

     loop_
    _category_key.name             '_diffrn_data_frame.id'
                                   '_diffrn_data_frame.detector_element_id'
                                   '_diffrn_data_frame.variant'
     loop_
    _category_group.id             'inclusive_group'
                                   'array_data_group'
                                   'diffrn_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;   Example 1 - A frame containing data from 4 frame elements.
                Each frame element has a common array configuration
                'array_1' described in ARRAY_STRUCTURE and related
                categories.  The data for each detector element are
                stored in four groups of binary data in the
                ARRAY_DATA category, linked by the array_id and
                binary_id.
;
;
        loop_
        _diffrn_data_frame.id
        _diffrn_data_frame.detector_element_id
        _diffrn_data_frame.array_id
        _diffrn_data_frame.binary_id
        frame_1   d1_ccd_1  array_1  1
        frame_1   d1_ccd_2  array_1  2
        frame_1   d1_ccd_3  array_1  3
        frame_1   d1_ccd_4  array_1  4
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

     save_


save__diffrn_data_frame.array_id
    _item_description.description
;             This item is a pointer to _array_structure.id in the
              ARRAY_STRUCTURE category.
;
    _item.name                  '_diffrn_data_frame.array_id'
    _item.category_id             diffrn_data_frame
    _item.mandatory_code          implicit
    _item_aliases.alias_name    '_diffrn_frame_data.array_id'
    _item_aliases.dictionary      cif_img.dic
    _item_aliases.version         1.0
    _item_type.code               code
     save_


save__diffrn_data_frame.array_section_id
    _item_description.description
;             This item is a pointer to _array_structure_list_section.id
              in the ARRAY_STRUCTURE_LIST_SECTION category.
;
    _item.name                  '_diffrn_data_frame.array_section_id'
    _item.category_id             diffrn_data_frame
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


save__diffrn_data_frame.binary_id
    _item_description.description
;             This item is a pointer to _array_data.binary_id in the
              ARRAY_DATA category.
;
    _item.name                  '_diffrn_data_frame.binary_id'
    _item.category_id             diffrn_data_frame
    _item.mandatory_code          implicit
    _item_aliases.alias_name    '_diffrn_frame_data.binary_id'
    _item_aliases.dictionary      cif_img.dic
    _item_aliases.version         1.0
    _item_type.code               int
     save_


save__diffrn_data_frame.center_fast
     _item_description.description
;             The value of _diffrn_data_frame.center_fast is
              the fast index axis beam center position relative to the detector
              element face in the units specified in the data item
              '_diffrn_data_frame.center_units' along the fast
              axis of the detector from the center of the first pixel to
              the point at which the Z-axis (which should be colinear with the
              beam) intersects the face of the detector, if in fact is does.
              At the time of the measurement the current setting of detector
              positioner given frame are used.

              It is important to note that for measurements in millimetres,
              the sense of the axis is used, rather than the sign of the
              pixel-to-pixel increments.

;
     _item.name '_diffrn_data_frame.center_fast'
     _item.category_id             diffrn_data_frame
     _item.mandatory_code          no
     _item_type.code               float

     save_


save__diffrn_data_frame.center_slow
     _item_description.description
;             The value of _diffrn_data_frame.center_slow is
              the slow index axis beam center position relative to the detector
              element face in the units specified in the data item
              '_diffrn_data_frame.center_units' along the slow
              axis of the detector from the center of the first pixel to
              the point at which the Z-axis (which should be colinear with the
              beam) intersects the face of the detector, if in fact is does.
              At the time of the measurement the current setting of detector
              positioner given frame are used.

              It is important to note that the sense of the axis is used,
              rather than the sign of the pixel-to-pixel increments.

;
     _item.name '_diffrn_data_frame.center_slow'
     _item.category_id             diffrn_data_frame
     _item.mandatory_code          no
     _item_type.code               float

     save_


save__diffrn_data_frame.center_derived
    _item_description.description
;              The value of _diffrn_data_frame.center_derived
               is assumed to be 'yes', i.e. that values of
               _diffrn_data_frame.center_fast and
               _diffrn_data_frame.center_slow
               are derived from the axis settings rather than measured.              
;
    _item.name                  '_diffrn_data_frame.center_derived'
    _item.category_id             diffrn_data_frame
    _item.mandatory_code          no
    _item_type.code               ucode
    _item_default.value           'yes'
     save_


save__diffrn_data_frame.center_units
     _item_description.description
;             The value of _diffrn_data_frame.center_units
              specifies the units in which the values of
              '_diffrn_data_frame.center_fast' and
              '_diffrn_data_frame.center_slow'
              are presented.  The default is 'mm' for millimetres.  The
              alternatives are 'pixels' and 'bins'.  In all cases the
              center distances are measured from the center of the
              first pixel, i.e. in a 2x2 binning, the measuring origin
              is offset from the centers of the bins by one half pixel
              towards the first pixel.
             
              If 'bins' is specified, the data in
                  '_array_intensities.pixel_fast_bin_size',
                  '_array_intensities.pixel_slow_bin_size', and
                  '_array_intensities.pixel_binning_method'
              is used to define the binning scheme.


;
     _item.name '_diffrn_data_frame.center_units'
     _item.category_id             diffrn_data_frame
     _item.mandatory_code          no
     _item_type.code               code
      loop_
     _item_enumeration.value
     _item_enumeration.detail
                                   mm        'millimetres'
                                   pixels    'detector pixels'
                                   bins      'detector bins'

     save_




save__diffrn_data_frame.detector_element_id
    _item_description.description
;              This item is a pointer to _diffrn_detector_element.id
               in the DIFFRN_DETECTOR_ELEMENT category.
;
    _item.name                  '_diffrn_data_frame.detector_element_id'
    _item.category_id             diffrn_data_frame
    _item.mandatory_code          yes
    _item_aliases.alias_name    '_diffrn_frame_data.detector_element_id'
    _item_aliases.dictionary      cif_img.dic
    _item_aliases.version         1.0
    _item_type.code               code
     save_


save__diffrn_data_frame.id
    _item_description.description
;             The value of _diffrn_data_frame.id must uniquely identify
              each complete frame of data.
;
     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
           '_diffrn_data_frame.id'        diffrn_data_frame  yes
           '_diffrn_refln.frame_id'       diffrn_refln       yes
           '_diffrn_scan.frame_id_start'  diffrn_scan        yes
           '_diffrn_scan.frame_id_end'    diffrn_scan        yes
           '_diffrn_scan_frame.frame_id'  diffrn_scan_frame  yes
           '_diffrn_scan_frame_axis.frame_id'
                                          diffrn_scan_frame_axis
                                                             yes
           '_diffrn_scan_frame_monitor.frame_id'
                                          diffrn_scan_frame_monitor
                                                             implicit
    _item_aliases.alias_name    '_diffrn_frame_data.id'
    _item_aliases.dictionary      cif_img.dic
    _item_aliases.version         1.0
    _item_type.code               code
     loop_
    _item_linked.child_name
    _item_linked.parent_name
           '_diffrn_refln.frame_id'        '_diffrn_data_frame.id'
           '_diffrn_scan.frame_id_start'   '_diffrn_data_frame.id'
           '_diffrn_scan.frame_id_end'     '_diffrn_data_frame.id'
           '_diffrn_scan_frame.frame_id'   '_diffrn_data_frame.id'
           '_diffrn_scan_frame_axis.frame_id'
                                           '_diffrn_data_frame.id'
           '_diffrn_scan_frame_monitor.frame_id'
                                           '_diffrn_data_frame.id'
     save_


save__diffrn_data_frame.details
     _item_description.description
;              The value of _diffrn_data_frame.details should give a
               description of special aspects of each frame of data.

               This is an appropriate location in which to record
               information from vendor headers as presented in those
               headers, but it should never be used as a substitute
               for providing the fully parsed information within
               the appropriate imgCIF/CBF categories.
              
               Normally, when a conversion from a miniCBF has been done
               the data from '_array_data.header_convention'
               should be transferred to this data item and
               '_array_data.header_convention'
               should be removed.
;
    _item.name                  '_diffrn_data_frame.details'
    _item.category_id             diffrn_data_frame
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_frame_data.details'
    _item_aliases.dictionary      cif_img.dic
    _item_aliases.version         1.4
    _item_type.code               text
     loop_
    _item_examples.case
    _item_examples.detail
;
 HEADER_BYTES = 512;
 DIM = 2;
 BYTE_ORDER = big_endian;
 TYPE = unsigned_short;
 SIZE1 = 3072;
 SIZE2 = 3072;
 PIXEL_SIZE = 0.102588;
 BIN = 2x2;
 DETECTOR_SN = 901;
 TIME = 29.945155;
 DISTANCE = 200.000000;
 PHI = 85.000000;
 OSC_START = 85.000000;
 OSC_RANGE = 1.000000;
 WAVELENGTH = 0.979381;
 BEAM_CENTER_X = 157.500000;
 BEAM_CENTER_Y = 157.500000;
 PIXEL SIZE = 0.102588;
 OSCILLATION RANGE = 1;
 EXPOSURE TIME = 29.9452;
 TWO THETA = 0;
 BEAM CENTRE = 157.5 157.5;
;
;               Example of header information extracted from an ADSC Quantum
                315 detector header by CBFlib_0.7.6.  Image provided by Chris
                Nielsen of ADSC from a data collection at SSRL beamline 1-5.
;
      save_

save__diffrn_data_frame.variant
    _item_description.description
;             The value of _diffrn_data_frame.variant gives the variant
              to which the given DIFFRN_DATA_FRAME row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_data_frame.variant'
    _item.category_id             diffrn_data_frame
    _item.mandatory_code          implicit
    _item_type.code               code
     save_



##########################################################################
#  The following is a restatement of the mmCIF DIFFRN_DETECTOR,          #
#  DIFFRN_MEASUREMENT and DIFFRN_RADIATION categories, modified for      #
#  the CBF/imgCIF extensions                                             #
##########################################################################

###################
# DIFFRN_DETECTOR #
###################


save_diffrn_detector
    _category.description
;              Data items in the DIFFRN_DETECTOR category describe the
               detector used to measure the scattered radiation, including
               any analyser and post-sample collimation.
;
    _category.id                  diffrn_detector
    _category.mandatory_code      no
    _category.NX_mapping_details
;
   
    _diffrn_detector.diffrn_id DIFFRNID
    _diffrn_detector.id DETECTORNAME
    _diffrn_detector.details DETAILS
    _diffrn_detector.detector DETECTOR
    _diffrn_detector.dtime DTIME
    _diffrn_detector.gain_setting GAINSETTING
    _diffrn_detector.number_of_axes NAXES
    _diffrn_detector.type DETTYPE
   
    -->
   
      /entry:NXentry
        /CBF_scan_id="SCANID"
        /CBF_diffrn_id="DIFFRNID"
          /instrument:NXinstrument
           /DETECTORNAME:NXdetector_group
           /DETECTORELEMENTNAME:NXdetector
              /details="DETAILS"
              /type="DETECTOR"
              /deadtime=DTIME
              /number_of_axes=NAXES
              /decription="DETTYPE"
              /gain_setting="GAINSETTING"
   
;

     loop_
    _category_key.name          '_diffrn_detector.diffrn_id'
                                '_diffrn_detector.id'
                                '_diffrn_detector.variant'
     loop_
    _category_group.id           'inclusive_group'
                                 'diffrn_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;   Example 1 - based on PDB entry 5HVP and laboratory records for the
                structure corresponding to PDB entry 5HVP.
;
;
    _diffrn_detector.diffrn_id             'd1'
    _diffrn_detector.detector              'multiwire'
    _diffrn_detector.type                  'Siemens'
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

     save_


save__diffrn_detector.details
    _item_description.description
;              A description of special aspects of the radiation detector.
;
    _item.name                  '_diffrn_detector.details'
    _item.category_id             diffrn_detector
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_detector_details'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
    _item_type.code                   text
    _item_examples.case        'slow mode'
     save_


save__diffrn_detector.detector
    _item_description.description
;              The general class of the radiation detector.
;
    _item.name                  '_diffrn_detector.detector'
    _item.category_id             diffrn_detector
    _item.mandatory_code          no
     loop_
    _item_aliases.alias_name
    _item_aliases.dictionary
    _item_aliases.version       '_diffrn_radiation_detector'
                                  cifdic.c91
                                  1.0
                                '_diffrn_detector'
                                  cif_core.dic
                                  2.0
    _item_type.code               text
     loop_
    _item_examples.case          'photographic film'
                                 'scintillation counter'
                                 'CCD plate'
                                 'BF~3~ counter'
     save_


save__diffrn_detector.diffrn_id
    _item_description.description
;              This data item is a pointer to _diffrn.id in the DIFFRN
               category.

               The value of _diffrn.id uniquely defines a set of
               diffraction data.
;
    _item.name                  '_diffrn_detector.diffrn_id'
    _item.category_id             diffrn_detector
    _item.mandatory_code          yes
    _item_type.code               code
     save_


save__diffrn_detector.dtime
    _item_description.description
;              The deadtime in microseconds of the detector(s) used to
               measure the diffraction intensities.
;
    _item.name                  '_diffrn_detector.dtime'
    _item.category_id             diffrn_detector
    _item.mandatory_code          no
     loop_
    _item_aliases.alias_name
    _item_aliases.dictionary
    _item_aliases.version       '_diffrn_radiation_detector_dtime'
                                  cifdic.c91
                                  1.0
                                '_diffrn_detector_dtime'
                                  cif_core.dic
                                  2.0
     loop_
    _item_range.maximum
    _item_range.minimum            .    0.0
                                  0.0   0.0
    _item_type.code               float
    _item_units.code              microseconds
     save_


save__diffrn_detector.id
    _item_description.description
;              The value of _diffrn_detector.id must uniquely identify
               each detector used to collect each diffraction data set.

               If the value of _diffrn_detector.id is not given, it is
               implicitly equal to the value of
               _diffrn_detector.diffrn_id.
;
     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
             '_diffrn_detector.id'         diffrn_detector       implicit
             '_diffrn_detector_axis.detector_id'
                                           diffrn_detector_axis       yes
             '_diffrn_scan_frame_monitor.detector_id'
                                           diffrn_scan_frame_monitor  yes
     loop_
    _item_linked.child_name
    _item_linked.parent_name
             '_diffrn_detector_axis.detector_id'
                                         '_diffrn_detector.id'
             '_diffrn_scan_frame_monitor.detector_id'
                                         '_diffrn_detector.id'

    _item_type.code               code
     save_


save__diffrn_detector.layer_thickness
    _item_description.description
;            The thickness in mm of the sensing layer of the detector
                 for use in anglular corrections.
;
    _item.name                  '_diffrn_detector.layer_thickness'
    _item.category_id             diffrn_detector
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum            .    0.0
                                  0.0   0.0
    _item_type.code               float
    _item_units.code              millimetres
     save_

save__diffrn_detector.gain_setting
    _item_description.description
;          The gain setting for detector.   This is a text string usually
               reflecting a detector setting that may have a simple or very
               complex relationship with the value of
               _array_intensities.gain
               and should not be used directly for computations without
               further information.
   
               This tag is provided for completeness in recording the settings
               of an experiment using a dector with a panel-switch, jumper
               or control command that allows a choice of gain settings.
   
;
    _item.name                  '_diffrn_detector.gain_setting'
    _item.category_id             diffrn_detector
    _item.mandatory_code          no
    _item_type.code               text
    save_


save__diffrn_detector.number_of_axes
    _item_description.description
;              The value of _diffrn_detector.number_of_axes gives the
               number of axes of the positioner for the detector identified
               by _diffrn_detector.id.

               The word 'positioner' is a general term used in
               instrumentation design for devices that are used to change
               the positions of portions of apparatus by linear
               translation, rotation or combinations of such motions.

               Axes which are used to provide a coordinate system for the
               face of an area detetctor should not be counted for this
               data item.

               The description of each axis should be provided by entries
               in DIFFRN_DETECTOR_AXIS.
;
    _item.name                  '_diffrn_detector.number_of_axes'
    _item.category_id             diffrn_detector
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .   1
                                  1   1
    _item_type.code               int
     save_



save__diffrn_detector.type
    _item_description.description
;              The make, model or name of the detector device used.
;
    _item.name                  '_diffrn_detector.type'
    _item.category_id             diffrn_detector
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_detector_type'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
    _item_type.code               text
     save_

save__diffrn_detector.variant
    _item_description.description
;             The value of _diffrn_detector.variant gives the variant
              to which the given DIFFRN_DETECTOR row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_detector.variant'
    _item.category_id             diffrn_detector
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


########################
# DIFFRN_DETECTOR_AXIS #
########################


save_diffrn_detector_axis
    _category.description
;    Data items in the DIFFRN_DETECTOR_AXIS category associate
     axes with detectors.
;
    _category.id                   diffrn_detector_axis
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _diffrn_detector_axis.axis_id AXISID -->
    _diffrn_detector_axis.detector_id DETECTORNAME -->
        /instrument:NXinstrument
         /DETECTORNAME:NXdetector_group
         /DETECTORELEMENTNAME:NXdetector
            /transformations:NXtransformations
              /AXISID=[]

This information normally will duplicate information obtained from
the ARRAY_STRUCTURE_LIST_AXIS.

;

     loop_
    _category_key.name          '_diffrn_detector_axis.detector_id'
                                '_diffrn_detector_axis.axis_id'
                                '_diffrn_detector_axis.variant'
     loop_
    _category_group.id           'inclusive_group'
                                 'diffrn_group'
     save_


save__diffrn_detector_axis.axis_id
    _item_description.description
;              This data item is a pointer to _axis.id in
               the AXIS category.
;
    _item.name                  '_diffrn_detector_axis.axis_id'
    _item.category_id             diffrn_detector_axis
    _item.mandatory_code          yes
    _item_type.code               code
     save_


save__diffrn_detector_axis.detector_id
    _item_description.description
;              This data item is a pointer to _diffrn_detector.id in
               the DIFFRN_DETECTOR category.

               This item was previously named _diffrn_detector_axis.id
               which is now a deprecated name.  The old name is
               provided as an alias but should not be used for new work.
;
    _item.name                  '_diffrn_detector_axis.detector_id'
    _item.category_id             diffrn_detector_axis
    _item.mandatory_code          yes
    _item_aliases.alias_name    '_diffrn_detector_axis.id'
    _item_aliases.dictionary      cif_img.dic
    _item_aliases.version         1.0
    _item_type.code               code
     save_
    
save__diffrn_detector_axis.variant
    _item_description.description
;             The value of _diffrn_detector_axis.variant gives the variant
              to which the given DIFFRN_DETECTOR_AXIS row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_detector_axis.variant'
    _item.category_id             diffrn_detector_axis
    _item.mandatory_code          implicit
    _item_type.code               code
     save_



###########################
# DIFFRN_DETECTOR_ELEMENT #
###########################


save_diffrn_detector_element
    _category.description
;             Data items in the DIFFRN_DETECTOR_ELEMENT category record
              the details about spatial layout and other characteristics
              of each element of a detector which may have multiple elements.

              In most cases, giving more detailed information
              in ARRAY_STRUCTURE_LIST and ARRAY_STRUCTURE_LIST_AXIS
              is preferable to simply providing the centre of the
              detector element.
;
    _category.id                   diffrn_detector_element
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _diffrn_detector_element.id ELEMENTID
    _diffrn_detector_element.detector_id DETECTORNAME
    _diffrn_detector_element.reference_center_fast RCF
    _diffrn_detector_element.reference_center_slow RCS
    _diffrn_detector_element.reference_center_units UNITS
   
    -->
   
    /entry:NXentry
      /CBF_scan_id="SCANID"
      /CBF_diffrn_id="DIFFRNID"
      /instrument:NXinstrument
       /DETECTORNAME:NXdetector_group
       /DETECTORELEMENTNAME:NXdetector
          /beam_center_x=[RCS]  (converted from UNITS as needed)
            @units=mm
          /beam_center_y=[RCF]  (converted from UNITS as needed)
            @units=mm
          /CBF_diffrn_detector_element__id="ELEMENTID1:ELEMENTID2:..."
          /CBF_diffrn_detector_element__reference_center_fast=[RCF1,RCF2,...]
          /CBF_diffrn_detector_element__reference_center_slow=[RCS1,RCS2,...]
          /CBF_diffrn_detector_element__id="UNITS1:UNITS2:..."
     inserts ELEMENTID into the colon-separated list of element IDs
     inserts RCF into the array of reference centers
     inserts RCS into the array of reference centers
     inserts ELEMENTID into the colon-separated list of units
   
;

     loop_
    _category_key.name             '_diffrn_detector_element.id'
                                   '_diffrn_detector_element.detector_id'
                                   '_diffrn_detector_element.variant'
     loop_
    _category_group.id             'inclusive_group'
                                   'array_data_group'
                                   'diffrn_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;       Example 1 - Detector d1 is composed of four CCD detector elements,
        each 200 mm by 200 mm, arranged in a square, in the pattern

                   1     2
                      *
                   3     4

        Note that the beam centre is slightly displaced from each of the
        detector elements, just beyond the lower right corner of 1,
        the lower left corner of 2, the upper right corner of 3 and
        the upper left corner of 4.  For each element, the detector
        face coordiate system, is assumed to have the fast axis
        running from left to right and the slow axis running from
        top to bottom with the origin at the top left corner.
;
;
        loop_
        _diffrn_detector_element.detector_id
        _diffrn_detector_element.id
        _diffrn_detector_element.reference_center_fast
        _diffrn_detector_element.reference_center_slow
        _diffrn_detector_element.reference_center_units
        d1     d1_ccd_1  201.5 201.5  mm
        d1     d1_ccd_2  -1.8  201.5  mm
        d1     d1_ccd_3  201.6  -1.4  mm
        d1     d1_ccd_4  -1.7   -1.5  mm
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     save_



save__diffrn_detector_element.id
    _item_description.description
;             The value of _diffrn_detector_element.id must uniquely
              identify each element of a detector.
;
     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
           '_diffrn_detector_element.id'
           diffrn_detector_element
           yes
    _item_type.code               code
     loop_
    _item_linked.child_name
    _item_linked.parent_name
           '_diffrn_data_frame.detector_element_id'
           '_diffrn_detector_element.id'

     save_


save__diffrn_detector_element.detector_id
    _item_description.description
;              This item is a pointer to _diffrn_detector.id
               in the DIFFRN_DETECTOR category.
;
    _item.name                  '_diffrn_detector_element.detector_id'
    _item.category_id             diffrn_detector_element
    _item.mandatory_code          yes
    _item_type.code               code
     save_

save__diffrn_detector_element.reference_center_fast
     _item_description.description
;             The value of _diffrn_detector_element.reference_center_fast is
              the fast index axis beam center position relative to the detector
              element face in the units specified in the data item
              '_diffrn_detector_element.reference_center_units' along the fast
              axis of the detector from the center of the first pixel to
              the point at which the Z-axis (which should be colinear with the
              beam) intersects the face of the detector, if in fact is does.  
              At the time of the measurement all settings of the detector
              positioner should be at their reference settings.  If more than
              one reference setting has been used the value given whould be
              representive of the beam center as determined from the ensemble
              of settings.

              It is important to note that for measurements in millimetres,
              the sense of the axis is used, rather than the sign of the
              pixel-to-pixel increments.

;
     _item.name '_diffrn_detector_element.reference_center_fast'
     _item.category_id             diffrn_detector_element
     _item.mandatory_code          no
     _item_type.code               float

     save_


save__diffrn_detector_element.reference_center_slow
     _item_description.description
;             The value of _diffrn_detector_element.reference_center_slow is
              the slow index axis beam center position relative to the detector
              element face in the units specified in the data item
              '_diffrn_detector_element.reference_center_units' along the slow
              axis of the detector from the center of the first pixel to
              the point at which the Z-axis (which should be colinear with the
              beam) intersects the face of the detector, if in fact is does.
              At the time of the measurement all settings of the detector
              positioner should be at their reference settings.  If more than
              one reference setting has been used the value givien whould be
              representive of the beam center as determined from the ensemble
              of settings.

              It is important to note that the sense of the axis is used,
              rather than the sign of the pixel-to-pixel increments.

;
     _item.name '_diffrn_detector_element.reference_center_slow'
     _item.category_id             diffrn_detector_element
     _item.mandatory_code          no
     _item_type.code               float

     save_


save__diffrn_detector_element.reference_center_units
     _item_description.description
;             The value of _diffrn_detector_element.reference_center_units
              specifies the units in which the values of
              '_diffrn_detector_element.reference_center_fast' and
              '_diffrn_detector_element.reference_center_slow'
              are presented.  The default is 'mm' for millimetres.  The
              alternatives are 'pixels' and 'bins'.  In all cases the
              center distances are measured from the center of the
              first pixel, i.e. in a 2x2 binning, the measuring origin
              is offset from the centers of the bins by one half pixel
              towards the first pixel.
             
              If 'bins' is specified, the data in
                  '_array_intensities.pixel_fast_bin_size',
                  '_array_intensities.pixel_slow_bin_size', and
                  '_array_intensities.pixel_binning_method'
              is used to define the binning scheme.


;
     _item.name '_diffrn_detector_element.reference_center_units'
     _item.category_id             diffrn_detector_element
     _item.mandatory_code          no
     _item_type.code               code
      loop_
     _item_enumeration.value
     _item_enumeration.detail
                                   mm        'millimetres'
                                   pixels    'detector pixels'
                                   bins      'detector bins'

     save_

save__diffrn_detector_element.variant
    _item_description.description
;             The value of _diffrn_detector_element.variant gives the variant
              to which the given DIFFRN_DETECTOR_ELEMENT row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_detector_element.variant'
    _item.category_id             diffrn_detector_element
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


########################
## DIFFRN_MEASUREMENT ##
########################


save_diffrn_measurement
    _category.description
;              Data items in the DIFFRN_MEASUREMENT category record details
               about the device used to orient and/or position the crystal
               during data measurement and the manner in which the
               diffraction data were measured.
;
    _category.id                  diffrn_measurement
    _category.mandatory_code      no
    _category.NX_mapping_details
;
   
    _diffrn_measurement.diffrn_id DIFFRNID
    _diffrn_measurement.details DETAILS
    _diffrn_measurement.device DEVICE
    _diffrn_measurement.device_details DEVDETAILS
    _diffrn_measurement.device_type DEVTYPE
    _diffrn_measurement.id GONIOMETER
    _diffrn_measurement.method METHOD
    _diffrn_measurement.number_of_axes NUMBER
    _diffrn_measurement.sample_detector_distance DIST
    _diffrn_measurement.sample_detector_distance_derived DISTDERIVED
    _diffrn_measurement.sample_detector_voffset VOFST
    _diffrn_measurement.specimen_support SPECSPRT
   
    -->
   
    /entry:NXentry
      /CBF_scan_id="SCANID
      /CBF_diffrn_id="DIFFRNID"
      /instrument:NXinstrument
      /CBF_diffrn_measurement__GONIOMETER:NXgoniometer
        /details="DETAILS"
        /local_name="DEVICE"
        /description="DEVDETAILS"
        /type="DEVTYPE"
        /CBF_diffrn_measurement__method="METHOD"
          /number_of_axes=NUMBER
        /CBF_diffrn_measurement__specimen_support="SPECSPRT"
      /CBF_diffrn_detector__DETECTORNAME:NXdetector
        /distance=DIST
          @units="mm"
        /distance_derived=DISTDERIVED
        /CBF_diffrn_measurement__sample_detector_voffset=VOFST
          @units="mm"   
;
     loop_
    _category_key.name          '_diffrn_measurement.device'
                                '_diffrn_measurement.diffrn_id'
                                '_diffrn_measurement.id'
                                '_diffrn_measurement.variant'
     loop_
    _category_group.id           'inclusive_group'
                                 'diffrn_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;    Example 1 - based on PDB entry 5HVP and laboratory records for the
                 structure corresponding to PDB entry 5HVP
;
;
    _diffrn_measurement.diffrn_id          'd1'
    _diffrn_measurement.device             '3-circle camera'
    _diffrn_measurement.device_type        'Supper model X'
    _diffrn_measurement.device_details     'none'
    _diffrn_measurement.method             'omega scan'
    _diffrn_measurement.details
    ; 440 frames, 0.20 degrees, 150 sec, detector distance 12 cm, detector
      angle 22.5 degrees
    ;
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;     Example 2 - based on data set TOZ of Willis, Beckwith & Tozer
                  [Acta Cryst. (1991), C47, 2276-2277].
;
;
    _diffrn_measurement.diffrn_id       's1'
    _diffrn_measurement.device_type     'Philips PW1100/20 diffractometer'
    _diffrn_measurement.method          'theta/2theta (\q/2\q)'
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     save_


save__diffrn_measurement.device
    _item_description.description
;              The general class of goniometer or device used to support
               and orient the specimen.

               If the value of _diffrn_measurement.device is not given,
               it is implicitly equal to the value of
               _diffrn_measurement.diffrn_id.

               Either _diffrn_measurement.device or
               _diffrn_measurement.id may be used to link to other
               categories.  If the experimental setup admits multiple
               devices, then _diffrn_measurement.id is used to provide
               a unique link.
;
     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
             '_diffrn_measurement.device'  diffrn_measurement      implicit
             '_diffrn_measurement_axis.measurement_device'
                                           diffrn_measurement_axis implicit
     loop_
    _item_linked.child_name
    _item_linked.parent_name
             '_diffrn_measurement_axis.measurement_device'
                                         '_diffrn_measurement.device'
    _item_aliases.alias_name    '_diffrn_measurement_device'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
    _item_type.code               text
     loop_
    _item_examples.case          '3-circle camera'
                                 '4-circle camera'
                                 'kappa-geometry camera'
                                 'oscillation camera'
                                 'precession camera'
     save_


save__diffrn_measurement.device_details
    _item_description.description
;              A description of special aspects of the device used to
               measure the diffraction intensities.
;
    _item.name                  '_diffrn_measurement.device_details'
    _item.category_id             diffrn_measurement
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_measurement_device_details'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
    _item_type.code               text
    _item_examples.case
;                                 commercial goniometer modified locally to
                                  allow for 90\% \t arc
;
     save_


save__diffrn_measurement.device_type
    _item_description.description
;              The make, model or name of the measurement device
               (goniometer) used.
;
    _item.name                  '_diffrn_measurement.device_type'
    _item.category_id             diffrn_measurement
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_measurement_device_type'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
    _item_type.code               text
     loop_
    _item_examples.case          'Supper model q'
                                 'Huber model r'
                                 'Enraf-Nonius model s'
                                 'home-made'
     save_


save__diffrn_measurement.diffrn_id
    _item_description.description
;              This data item is a pointer to _diffrn.id in the DIFFRN
               category.
;
    _item.name                  '_diffrn_measurement.diffrn_id'
    _item.category_id             diffrn_measurement
    _item.mandatory_code          yes
    _item_type.code               code
     save_


save__diffrn_measurement.details
    _item_description.description
;              A description of special aspects of the intensity
               measurement.
;
    _item.name                  '_diffrn_measurement.details'
    _item.category_id             diffrn_measurement
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_measurement_details'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
    _item_type.code               text
    _item_examples.case
;                                 440 frames, 0.20 degrees, 150 sec, detector
                                  distance 12 cm, detector angle 22.5 degrees
;
     save_


save__diffrn_measurement.id
    _item_description.description
;              The value of _diffrn_measurement.id must uniquely identify
               the set of mechanical characteristics of the device used to
               orient and/or position the sample used during the collection
               of each diffraction data set.

               If the value of _diffrn_measurement.id is not given, it is
               implicitly equal to the value of
               _diffrn_measurement.diffrn_id.

               Either _diffrn_measurement.device or
               _diffrn_measurement.id may be used to link to other
               categories.  If the experimental setup admits multiple
               devices, then _diffrn_measurement.id is used to provide
               a unique link.
;
     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
             '_diffrn_measurement.id'      diffrn_measurement      implicit
             '_diffrn_measurement_axis.measurement_id'
                                           diffrn_measurement_axis implicit
     loop_
    _item_linked.child_name
    _item_linked.parent_name
             '_diffrn_measurement_axis.measurement_id'
                                         '_diffrn_measurement.id'

    _item_type.code               code
     save_


save__diffrn_measurement.method
    _item_description.description
;              Method used to measure intensities.
;
    _item.name                  '_diffrn_measurement.method'
    _item.category_id             diffrn_measurement
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_measurement_method'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
    _item_type.code               text
    _item_examples.case
      'profile data from theta/2theta (\q/2\q) scans'
     save_


save__diffrn_measurement.number_of_axes
    _item_description.description
;              The value of _diffrn_measurement.number_of_axes gives the
               number of axes of the positioner for the goniometer or
               other sample orientation or positioning device identified
               by _diffrn_measurement.id.

               The description of the axes should be provided by entries in
               DIFFRN_MEASUREMENT_AXIS.
;
    _item.name                  '_diffrn_measurement.number_of_axes'
    _item.category_id             diffrn_measurement
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .   1
                                  1   1
    _item_type.code               int
     save_


#                  _diffrn_measurement.sample_detector_distance
#                  _diffrn_measurement.sample_detector_voffset

save__diffrn_measurement.sample_detector_distance
    _item_description.description
;              The value of _diffrn_measurement.sample_detector_distance gives
               the unsigned distance in millimetres from the sample to the
               detector along the beam.  Normally this distance is derived
               from the axis settings.
;
    _item.name                  '_diffrn_measurement.sample_detector_distance'
    _item.category_id             diffrn_measurement
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .   0.0
    _item_type.code               float
    _item_units.code              'millimetres'
     save_

save__diffrn_measurement.sample_detector_distance_derived
    _item_description.description
;              The value of _diffrn_measurement.sample_detector_distance_derived
               is assumed to be 'yes', i.e. that value of
               _diffrn_measurement.sample_detector_distance
               is derived from the axis settings rather than measured.              
;
    _item.name                  '_diffrn_measurement.sample_detector_distance_derived'
    _item.category_id             diffrn_measurement
    _item.mandatory_code          no
    _item_type.code               ucode
    _item_default.value           'yes'
     save_

save__diffrn_measurement.sample_detector_voffset
    _item_description.description
;              The value of _diffrn_measurement.sample_detector_voffset gives
               the signed distance in millimetres in the vertical
               direction (positive for up) from the center of
               the beam to the center of the detector.
;
    _item.name                  '_diffrn_measurement.sample_detector_voffset'
    _item.category_id             diffrn_measurement
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .   .
                                  .   .
    _item_type.code               float
    _item_units.code              'millimetres'
     save_


save__diffrn_measurement.specimen_support
    _item_description.description
;              The physical device used to support the crystal during data
               collection.
;
    _item.name                  '_diffrn_measurement.specimen_support'
    _item.category_id             diffrn_measurement
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_measurement_specimen_support'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
    _item_type.code               text
     loop_
    _item_examples.case          'glass capillary'
                                 'quartz capillary'
                                 'fiber'
                                 'metal loop'
     save_

save__diffrn_measurement.variant
    _item_description.description
;             The value of _diffrn_measurement.variant gives the variant
              to which the given DIFFRN_MEASUREMENT row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_measurement.variant'
    _item.category_id             diffrn_measurement
    _item.mandatory_code          implicit
    _item_type.code               code
     save_




###########################
# DIFFRN_MEASUREMENT_AXIS #
###########################


save_diffrn_measurement_axis
    _category.description
;    Data items in the DIFFRN_MEASUREMENT_AXIS category associate
     axes with goniometers.
;
    _category.id                   diffrn_measurement_axis
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _diffrn_measurement_axis.axis_id AXISID
    _diffrn_measurement_axis.measurement_device DEVICE
    _diffrn_measurement_axis.measurement_id GONIOMETER
   
    -->

    /entry:NXentry
      /CBF_scan_id="SCANID
      /CBF_diffrn_id="DIFFRNID"
      /sample:Nxsample
        /transformations:NXtransformations     
          /AXISID=[]     
      /instrument:NXinstrument
        /CBF_diffrn_measurement__GONIOMETER:NXgoniometer
          /CBF_diffrn_measurement__device="DEVICE"

       
;
     loop_
    _category_key.name
                              '_diffrn_measurement_axis.measurement_device'
                                '_diffrn_measurement_axis.measurement_id'
                                '_diffrn_measurement_axis.axis_id'
                                '_diffrn_measurement_axis.variant'
     loop_
    _category_group.id           'inclusive_group'
                                 'diffrn_group'
     save_


save__diffrn_measurement_axis.axis_id
    _item_description.description
;              This data item is a pointer to _axis.id in
               the AXIS category.
;
    _item.name                  '_diffrn_measurement_axis.axis_id'
    _item.category_id             diffrn_measurement_axis
    _item.mandatory_code          yes
    _item_type.code               code
     save_


save__diffrn_measurement_axis.measurement_device
    _item_description.description
;              This data item is a pointer to _diffrn_measurement.device
               in the DIFFRN_MEASUREMENT category.
;
    _item.name
      '_diffrn_measurement_axis.measurement_device'
    _item.category_id             diffrn_measurement_axis
    _item.mandatory_code          implicit
    _item_type.code               text
     save_


save__diffrn_measurement_axis.measurement_id
    _item_description.description
;              This data item is a pointer to _diffrn_measurement.id in
               the DIFFRN_MEASUREMENT category.

               This item was previously named _diffrn_measurement_axis.id,
               which is now a deprecated name.  The old name is
               provided as an alias but should not be used for new work.
;
    _item.name                  '_diffrn_measurement_axis.measurement_id'
    _item.category_id             diffrn_measurement_axis
    _item.mandatory_code          implicit
    _item_aliases.alias_name    '_diffrn_measurement_axis.id'
    _item_aliases.dictionary      cif_img.dic
    _item_aliases.version         1.0
    _item_type.code               code
     save_

save__diffrn_measurement_axis.variant
    _item_description.description
;             The value of _diffrn_measurement_axis.variant gives the variant
              to which the given DIFFRN_MEASUREMENT_AXIS row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_measurement_axis.variant'
    _item.category_id             diffrn_measurement_axis
    _item.mandatory_code          implicit
    _item_type.code               code
     save_



####################
# DIFFRN_RADIATION #
####################


save_diffrn_radiation
    _category.description
;              Data items in the DIFFRN_RADIATION category describe
               the radiation used for measuring diffraction intensities,
               its collimation and monochromatization before the sample.

               Post-sample treatment of the beam is described by data
               items in the DIFFRN_DETECTOR category.
;
    _category.id                  diffrn_radiation
    _category.mandatory_code      no
    _category.NX_mapping_details
;
   
    _diffrn_radiation.collimation    COLLIMATION
    _diffrn_radiation.diffrn_id      DIFFRNID
    _diffrn_radiation.div_x_source   DIVX
    _diffrn_radiation.div_y_source   DIVY
    _diffrn_radiation.div_x_y_source DIVXY
    _diffrn_radiation.filter_edge'   ABSEDGE
    _diffrn_radiation.inhomogeneity  HWIDTH
    _diffrn_radiation.monochromator  MONOCHROMATOR
    _diffrn_radiation.polarisn_norm  POLNANG
    _diffrn_radiation.polarisn_ratio POLRAT
    _diffrn_radiation.polarizn_source_norm   POLSNANG
    _diffrn_radiation.polarizn_source_ratio  POLSRAT
    _diffrn_radiation.polarizn_Stokes_I  SVECI
    _diffrn_radiation.polarizn_Stokes_Q  SVECQ
    _diffrn_radiation.polarizn_Stokes_U  SVECU
    _diffrn_radiation.polarizn_Stokes_V  SVECV
    _diffrn_radiation.polarisn_norm_esd  POLNANGESD
    _diffrn_radiation.polarisn_ratio_esd POLRATESD
    _diffrn_radiation.polarizn_source_norm_esd   POLSNANGESD
    _diffrn_radiation.polarizn_source_ratio_esd  POLSRATESD
    _diffrn_radiation.polarizn_Stokes_I_esd  SVECIESD
    _diffrn_radiation.polarizn_Stokes_Q_esd  SVECQESD
    _diffrn_radiation.polarizn_Stokes_U_esd  SVECUESD
    _diffrn_radiation.polarizn_Stokes_V_esd  SVECVESD
    _diffrn_radiation.probe          RADIATION
    _diffrn_radiation.type           SIEGBAHNTYPE
    _diffrn_radiation.xray_symbol    IUPACXRAYSYMB
    _diffrn_radiation.wavelength_id  ID
    _diffrn_radiation_wavelength.id  ID
    _diffrn_radiation_wavelength.wavelength    WAVELENGTH
    _diffrn_radiation_wavelength.wt            WEIGHT
    _diffrn_scan_frame.polarizn_Stokes_I STOKESI
    _diffrn_scan_frame.polarizn_Stokes_Q STOKESQ
    _diffrn_scan_frame.polarizn_Stokes_U STOKESU
    _diffrn_scan_frame.polarizn_Stokes_V STOKESV
    _diffrn_scan_frame.polarizn_Stokes_I_esd STOKESIESD
    _diffrn_scan_frame.polarizn_Stokes_Q_esd STOKESQESD
    _diffrn_scan_frame.polarizn_Stokes_U_esd STOKESUESD
    _diffrn_scan_frame.polarizn_Stokes_V_esd STOKESVESD
    _diffrn_scan_frame.frame_number FRAMENO
   
    -->

       /entry:NXentry
         /CBF_scan_id="SCANID"
         /sample:NXsample
           /beam:NXbeam
             /incident_divergence_x=DIVX
               @units="degrees"
             /incident_divergence_y=DIVY
               @units="degrees"
             /incident_divergence_xy=DIXXY
               @units="degrees^2"
             /CBF_diffrn_radiation_wavelength__wavelength_id=[WAVELENGTH_ID]
             /incident_wavelength=[WAVELENGTH]
               @units="A"
             /weight=[WEIGHT]
             /incident_polarisation_stokes_average=[SVECI,SVECQ,SVECU,SVECV]
             /incident_polarisation_stokes_average_uncertainty=[SVECIESD,SVECQESD,SVECUESD,SVECVESD]
             /incident_polarisation_stokes=[STOKESI,STOKESQ,STOKESU,STOKESV]
             /incident_polarisation_stokes_uncertainty=[STOKESIESD,STOKESQESD,STOKESUESD,STOKESVESD]
               @units="Watts/meter^2"
             /CBF_diffrn_radiation__polarisn_norm=POLNANG
               @units="deg"
             /CBF_diffrn_radiation__polarisn_ratio=POLRAT
             /CBF_diffrn_radiation__polarisn_norm_uncertainty=POLNANGESD
               @units="deg"
             /CBF_diffrn_radiation__polarisn_ratio_uncertainty=POLRATESD
             /CBF_diffrn_radiation__polarisn_source_norm=POLSNANG
               @units="deg"
             /CBF_diffrn_radiation__polarizn_source_ratio=POLSRAT
             /CBF_diffrn_radiation__polarisn_source_norm_uncertainty=POLSNANGESD
               @units="deg"
             /CBF_diffrn_radiation__polarizn_source_ratio_uncertainty=POLSRATESD
             /CBF_diffrn_radiation__filter_edge=ABSEDGE
                @units="angstroms"
             /CBF_diffrn_radiation__inhomogeneity=HWIDTH
                @units="mm"
         /instrument:NXinstrument
           /monchromator:NXmonochromator
             /description="MONOCHROMATOR"
           /source:NXsource
             /probe="RADIATION"
             /CBF_diffrn_radiation__type="SIEGBAHNTYPE"
             /CBF_diffrn_radiation__xray_symbol="IUPACXRAYSYMB"

         With the incident_polarisation_stokes array indexed by FRAMENO
   
;

     loop_
    _category_key.name          '_diffrn_radiation.diffrn_id'
                                '_diffrn_radiation.variant'
     loop_
    _category_group.id           'inclusive_group'
                                 'diffrn_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;   Example 1 - based on PDB entry 5HVP and laboratory records for the
                structure corresponding to PDB entry 5HVP
;
;
    _diffrn_radiation.diffrn_id            'set1'

    _diffrn_radiation.collimation          '0.3 mm double pinhole'
    _diffrn_radiation.monochromator        'graphite'
    _diffrn_radiation.type                 'Cu K\a'
    _diffrn_radiation.wavelength_id         1
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;    Example 2 - based on data set TOZ of Willis, Beckwith & Tozer
                [Acta Cryst. (1991), C47, 2276-2277].
;
;
    _diffrn_radiation.wavelength_id    1
    _diffrn_radiation.type             'Cu K\a'
    _diffrn_radiation.monochromator    'graphite'
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     save_

save__diffrn_radiation.beam_width
    _item_description.description
;              Full width at half max of the beam incident on the sample
               in the plane of polarization (or horizontally if unpolarized)
;
    _item.name                  '_diffrn_radiation.beam_width'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_type.code               float
    _item_units.code              micrometres
     save_

save__diffrn_radiation.beam_height
    _item_description.description
;              Full width at half max of the beam incident on the sample
               orthogonal plane of polarization (or vertically  if unpolarized)
;
    _item.name                  '_diffrn_radiation.beam_width'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_type.code               float
    _item_units.code              micrometres
     save_

save__diffrn_radiation.beam_flux
    _item_description.description
;              The average flux integrated over the beam incident on the sample.
;
    _item.name                  '_diffrn_radiation.beam_flux'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_type.code               float
    _item_units.code              'photons per second'
     save_


save__diffrn_radiation.collimation
    _item_description.description
;              The collimation or focusing applied to the radiation.
;
    _item.name                  '_diffrn_radiation.collimation'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_radiation_collimation'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
    _item_type.code               text
     loop_
    _item_examples.case          '0.3 mm double-pinhole'
                                 '0.5 mm'
                                 'focusing mirrors'
     save_


save__diffrn_radiation.diffrn_id
    _item_description.description
;              This data item is a pointer to _diffrn.id in the DIFFRN
               category.
;
    _item.name                  '_diffrn_radiation.diffrn_id'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          yes
    _item_type.code               code
     save_



save__diffrn_radiation.div_x_source
    _item_description.description
;              Beam crossfire in degrees parallel to the laboratory X axis
               (see AXIS category).

               This is a characteristic of the X-ray beam as it illuminates
               the sample (or specimen) after all monochromation and
               collimation.

               This is the standard uncertainty (e.s.d.)  of the directions of
               photons in the XZ plane around the mean source beam
               direction.

               Note that for some synchrotrons this value is specified
               in milliradians, in which case a conversion is needed.
               To convert a value in milliradians to a value in degrees,
               multiply by 0.180 and divide by \p.
;
    _item.name                  '_diffrn_radiation.div_x_source'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_type.code               float
    _item_units.code              degrees
     save_


save__diffrn_radiation.div_y_source
    _item_description.description
;              Beam crossfire in degrees parallel to the laboratory Y axis
               (see AXIS category).

               This is a characteristic of the X-ray beam as it illuminates
               the sample (or specimen) after all monochromation and
               collimation.

               This is the standard uncertainty (e.s.d.) of the directions
               of photons in the YZ plane around the mean source beam
               direction.

               Note that for some synchrotrons this value is specified
               in milliradians, in which case a conversion is needed.
               To convert a value in milliradians to a value in degrees,
               multiply by 0.180 and divide by \p.
;
    _item.name                  '_diffrn_radiation.div_y_source'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_type.code               float
    _item_units.code              degrees
    _item_default.value           0.0
     save_


save__diffrn_radiation.div_x_y_source
    _item_description.description
;              Beam crossfire correlation degrees^^2^ between the
               crossfire laboratory X-axis component and the crossfire
               laboratory Y-axis component (see AXIS category).

               This is a characteristic of the X-ray beam as it illuminates
               the sample (or specimen) after all monochromation and
               collimation.

               This is the mean of the products of the deviations of the
               direction of each photon in XZ plane times the deviations
               of the direction of the same photon in the YZ plane
               around the mean source beam direction.  This will be zero
               for uncorrelated crossfire.

               Note that some synchrotrons, this value is specified in
               milliradians^^2^, in which case a conversion would be needed.
               To go from a value in milliradians^^2^ to a value in
               degrees^^2^, multiply by 0.180^^2^ and divide by \p^^2^.

;
    _item.name                  '_diffrn_radiation.div_x_y_source'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_type.code               float
    _item_units.code              degrees_squared
    _item_default.value           0.0
     save_

save__diffrn_radiation.filter_edge
    _item_description.description
;              Absorption edge in \%Angstroms of the radiation filter used.
;
    _item.name                  '_diffrn_radiation.filter_edge'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_radiation_filter_edge'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
     loop_
    _item_range.maximum
    _item_range.minimum            .    0.0
                                  0.0   0.0
    _item_type.code               float
    _item_units.code              angstroms
     save_

save__diffrn_radiation.inhomogeneity
    _item_description.description
;              Half-width in millimetres of the incident beam in the
               direction perpendicular to the diffraction plane.
;
    _item.name                  '_diffrn_radiation.inhomogeneity'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_radiation_inhomogeneity'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
     loop_
    _item_range.maximum
    _item_range.minimum            .    0.0
                                  0.0   0.0
    _item_type.code               float
    _item_units.code              millimetres
     save_

save__diffrn_radiation.monochromator
    _item_description.description
;              The method used to obtain monochromatic radiation. If a
               monochromator crystal is used, the material and the
               indices of the Bragg reflection are specified.
;
    _item.name                  '_diffrn_radiation.monochromator'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_radiation_monochromator'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
    _item_type.code               text
     loop_
    _item_examples.case          'Zr filter'
                                 'Ge 220'
                                 'none'
                                 'equatorial mounted graphite'
     save_

save__diffrn_radiation.polarisn_norm
    _item_description.description
;              The angle in degrees, as viewed from the specimen, between the
               perpendicular component of the polarization and the diffraction
               plane. See _diffrn_radiation_polarisn_ratio.
;
    _item.name                  '_diffrn_radiation.polarisn_norm'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_radiation_polarisn_norm'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
     loop_
    _item_range.maximum
    _item_range.minimum           90.0  90.0
                                  90.0 -90.0
                                 -90.0 -90.0
    _item_type.code               float
    _item_units.code              degrees
     save_

save__diffrn_radiation.polarisn_norm_esd
    _item_description.description
;              The setimated standard deviation of
                  _diffrn_radiation.polarisn_norm,
               the angle in degrees, as viewed from the specimen, between the
               perpendicular component of the polarization and the diffraction
               plane. See _diffrn_radiation_polarisn_ratio.
;
    _item.name                  '_diffrn_radiation.polarisn_norm_esd'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .     0.0
                                  0.0   0.0
    _item_type.code               float
    _item_units.code              degrees
    loop_
    _item_related.related_name
    _item_related.function_code  '_diffrn_radiation.polarisn_norm'
                                 'associated_value'

     save_

save__diffrn_radiation.polarisn_ratio
    _item_description.description
;              Polarization ratio of the diffraction beam incident on the
               crystal. This is the ratio of the perpendicularly polarized to
               the parallel polarized component of the radiation. The
               perpendicular component forms an angle of
               _diffrn_radiation.polarisn_norm to the normal to the
               diffraction plane of the sample (i.e. the plane containing
               the incident and reflected beams).
;
    _item.name                  '_diffrn_radiation.polarisn_ratio'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_radiation_polarisn_ratio'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
     loop_
    _item_range.maximum
    _item_range.minimum            .    0.0
                                  0.0   0.0
    _item_type.code               float
     save_

save__diffrn_radiation.polarisn_ratio_esd
    _item_description.description
;              The setimated standard deviation of
               _diffrn_radiation.polarisn_ratio,
               the polarization ratio of the diffraction beam incident on the
               crystal.
;
    _item.name                  '_diffrn_radiation.polarisn_ratio_esd'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_radiation_polarisn_ratio_esd'
     loop_
    _item_range.maximum
    _item_range.minimum            .    0.0
                                  0.0   0.0
    _item_type.code               float
    loop_
    _item_related.related_name
    _item_related.function_code  '_diffrn_radiation.polarisn_ratio'
                                 'associated_value'
     save_


save__diffrn_radiation.polarizn_source_norm
    _item_description.description
;              The angle in degrees, as viewed from the specimen, between
               the normal to the polarization plane and the laboratory Y
               axis as defined in the AXIS category.

               Note that this is the angle of polarization of the source
               photons, either directly from a synchrotron beamline or
               from a monochromater.

               This differs from the value of
               _diffrn_radiation.polarisn_norm
               in that _diffrn_radiation.polarisn_norm refers to
               polarization relative to the diffraction plane rather than
               to the laboratory axis system.

               In the case of an unpolarized beam, or a beam with true
               circular polarization, in which no single plane of
               polarization can be determined, the plane should be taken
               as the XZ plane and the angle as 0.

               See _diffrn_radiation.polarizn_source_ratio.
;
    _item.name                  '_diffrn_radiation.polarizn_source_norm'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           90.0   90.0
                                  90.0  -90.0
                                 -90.0  -90.0
    _item_type.code               float
    _item_units.code              degrees
    _item_default.value           0.0
     save_


save__diffrn_radiation.polarizn_source_norm_esd
    _item_description.description
;              The setimated standard deviation of
                   _diffrn_radiation.polarizn_source_norm,
               the angle in degrees, as viewed from the specimen, between
               the normal to the polarization plane and the laboratory Y
               axis as defined in the AXIS category.
;
    _item.name
        '_diffrn_radiation.polarizn_source_norm_esd'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .      0.0
                                  0.0    0.0
    _item_type.code               float
    _item_units.code              degrees
    loop_
    _item_related.related_name
    _item_related.function_code  '_diffrn_radiation.polarizn_source_norm'
                                 'associated_value'

     save_


save__diffrn_radiation.polarizn_source_ratio
    _item_description.description
;              (Ip-In)/(Ip+In), where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization and In is the intensity (amplitude squared)
               of the electric vector in the plane of the normal to the
               plane of polarization.

               In the case of an unpolarized beam, or a beam with true
               circular polarization, in which no single plane of
               polarization can be determined, the plane is to be taken
               as the XZ plane and the normal is parallel to the Y axis.

               Thus, if there was complete polarization in the plane of
               polarization, the value of
               _diffrn_radiation.polarizn_source_ratio would be 1, and
               for an unpolarized beam
               _diffrn_radiation.polarizn_source_ratio would have a
               value of 0.

               If the X axis has been chosen to lie in the plane of
               polarization, this definition will agree with the definition
               of 'MONOCHROMATOR' in the Denzo glossary, and values of near
               1 should be expected for a bending-magnet source.  However,
               if the X axis were perpendicular to the polarization plane
               (not a common choice), then the Denzo value would be the
               negative of _diffrn_radiation.polarizn_source_ratio.

               See http://www.hkl-xray.com for information on Denzo and
               Otwinowski & Minor (1997).

               This differs both in the choice of ratio and choice of
               orientation from _diffrn_radiation.polarisn_ratio, which,
               unlike _diffrn_radiation.polarizn_source_ratio, is
               unbounded.

               Reference: Otwinowski, Z. & Minor, W. (1997). 'Processing of
               X-ray diffraction data collected in oscillation mode.' Methods
               Enzymol. 276, 307-326.
;
    _item.name                  '_diffrn_radiation.polarizn_source_ratio'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           1.0    1.0
                                  1.0   -1.0
                                 -1.0   -1.0
    _item_type.code               float
     save_


save__diffrn_radiation.polarizn_source_ratio_esd
    _item_description.description
;              The setimated standard deviation of
                   _diffrn_radiation.polarizn_source_ratio,
                (Ip-In)/(Ip+In), where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization and In is the intensity (amplitude squared)
               of the electric vector in the plane of the normal to the
               plane of polarization.
;
    _item.name                  '_diffrn_radiation.polarizn_source_ratio_esd'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .      0.0
                                  0.0    0.0
    _item_type.code               float
    loop_
    _item_related.related_name
    _item_related.function_code  '_diffrn_radiation.polarizn_source_ratio'
                                 'associated_value'
     save_


save__diffrn_radiation.polarizn_Stokes_I
    _item_description.description
;
               Ip+In+Inp, where where Ip is the intensity (amplitude squared)
               of the electric vector in the plane of polarization,
               In is the intensity (amplitude squared) of the electric vector
               in the plane of the normal to the plane of polarization,
               and Inp is the intensity (amplitude squared) of the non-
               polarized (incoherent) electric vector.
   
               This is an average or other representative sample of the
               scan.

               This is the first of the Stokes polarization parameters,
               I, Q, U, V (also known as I, M, C, S).  See
               H. H. Berry, G. Gabrielse, A. E. Livingston (1977),
               "Measurement of the Stokes parameters of Light",
               Applied Optics, 16:12, 3200 -- 3205.
   
               If the absolute intensity is not known, the value 1.
               is assumed for I, and all 4 Stokes parameters are
               dimensionless.  When the absolute intensity is known,
               all 4 Stokes parameters are in units of Watts per
               square meter.
   
               Note that, if the polarized intensity Ip+In is required,
               (Ip+In)^2 is the sum of Q^2+U^2+V^2.

;
    _item.name                  '_diffrn_radiation.polarizn_Stokes_I'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          implicit
    _item_default.value           1.0
    loop_
    _item_range.maximum
    _item_range.minimum          
                                   .    0.0
                                  0.0   0.0
    _item_type.code               float
     save_

save__diffrn_radiation.polarizn_Stokes_I_esd
    _item_description.description
;              The setimated standard deviation of
                   _diffrn_radiation.polarizn_Stokes_I,
               Ip+In+Inp, where where Ip is the intensity (amplitude squared)
               of the electric vector in the plane of polarization,
               In is the intensity (amplitude squared) of the electric vector
               in the plane of the normal to the plane of polarization,
               and Inp is the intensity (amplitude squared) of the non-
               polarized (incoherent) electric vector.
;
    _item.name                  '_diffrn_radiation.polarizn_Stokes_I_esd'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .      0.0
                                  0.0    0.0
    _item_type.code               float
    loop_
    _item_related.related_name
    _item_related.function_code  '_diffrn_radiation.polarizn_Stokes_I'
                                 'associated_value'
     save_

save__diffrn_radiation.polarizn_Stokes_Q
    _item_description.description
;
               (Ip-In)*cos(2*theta), where where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization, In is the intensity (amplitude squared) of
               the electric vector in the plane of the normal to the
               plane of polarization, and theta is the angle as viewed
               from the specimen, between the normal to the polarization
               plane and the laboratory Y axis as defined in the
               AXIS category.
   
               This is an average or other representative sample of the
               scan.

               This is the second of the Stokes polarization parameters,
               I, Q, U, V (also known as I, M, C, S).  See
               H. H. Berry, G. Gabrielse, A. E. Livingston (1977),
               "Measurement of the Stokes parameters of Light",
               Applied Optics, 16:12, 3200 -- 3205.
   
               If the absolute intensity is not known, the value 1.
               is assumed for I, and all 4 Stokes parameters are
               dimensionless.  When the absolute intensity is known,
               all 4 Stokes parameters are in units of Watts per
               square meter.

   
;
    _item.name                  '_diffrn_radiation.polarizn_Stokes_Q'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_type.code               float
     save_

save__diffrn_radiation.polarizn_Stokes_Q_esd
    _item_description.description
;              The setimated standard deviation of
                   _diffrn_radiation.polarizn_Stokes_Q,
               (Ip-In)*cos(2*theta), where where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization, In is the intensity (amplitude squared) of
               the electric vector in the plane of the normal to the
               plane of polarization, and theta is the angle as viewed
               from the specimen, between the normal to the polarization
               plane and the laboratory Y axis as defined in the
               AXIS category.
;
    _item.name                  '_diffrn_radiation.polarizn_Stokes_Q_esd'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .      0.0
                                  0.0    0.0
    _item_type.code               float
    loop_
    _item_related.related_name
    _item_related.function_code  '_diffrn_radiation.polarizn_Stokes_Q'
                                 'associated_value'
     save_

   
save__diffrn_radiation.polarizn_Stokes_U
    _item_description.description
;
               (Ip-In)*sin(2*theta), where where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization, In is the intensity (amplitude squared) of
               the electric vector in the plane of the normal to the
               plane of polarization, and theta is the angle as viewed
               from the specimen, between the normal to the polarization
               plane and the laboratory Y axis as defined in the
               AXIS category.
   
               This is an average or other representative sample of the
               scan.

               This is the third of the Stokes polarization parameters,
               I, Q, U, V (also known as I, M, C, S).  See
               H. H. Berry, G. Gabrielse, A. E. Livingston (1977),
               "Measurement of the Stokes parameters of Light",
               Applied Optics, 16:12, 3200 -- 3205.

               If the absolute intensity is not known, the value 1.
               is assumed for I, and all 4 Stokes parameters are
               dimensionless.  When the absolute intensity is known,
               all 4 Stokes parameters are in units of Watts per
               square meter.

   
;
    _item.name                  '_diffrn_radiation.polarizn_Stokes_U'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_type.code               float
     save_
   
save__diffrn_radiation.polarizn_Stokes_U_esd
    _item_description.description
;              The setimated standard deviation of
                   _diffrn_radiation.polarizn_Stokes_U,
               (Ip-In)*sin(2*theta), where where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization, In is the intensity (amplitude squared) of
               the electric vector in the plane of the normal to the
               plane of polarization, and theta is the angle as viewed
               from the specimen, between the normal to the polarization
               plane and the laboratory Y axis as defined in the
               AXIS category.
;
    _item.name                  '_diffrn_radiation.polarizn_Stokes_U_esd'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .      0.0
                                  0.0    0.0
    _item_type.code               float
    loop_
    _item_related.related_name
    _item_related.function_code  '_diffrn_radiation.polarizn_Stokes_U'
                                 'associated_value'
     save_

   
save__diffrn_radiation.polarizn_Stokes_V
    _item_description.description
;
               +/-2*sqrt(IpIn), with a + sign for right-handed circular
               polarization, where where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization and In is the intensity (amplitude squared) of
               the electric vector in the plane of the normal to the
               plane of polarization, and theta is the angle as viewed
               from the specimen, between the normal to the polarization
               plane and the laboratory Y axis as defined in the
               AXIS category.
   
               This is an average or other representative sample of the
               scan.

               This is the fourth of the Stokes polarization parameters,
               I, Q, U, V (also known as I, M, C, S).  See
               H. H. Berry, G. Gabrielse, A. E. Livingston (1977),
               "Measurement of the Stokes parameters of Light",
               Applied Optics, 16:12, 3200 -- 3205.

               If the absolute intensity is not known, the value 1.
               is assumed for I, and all 4 Stokes parameters are
               dimensionless.  When the absolute intensity is known,
               all 4 Stokes parameters are in units of Watts per
               square meter.

   
;
    _item.name                  '_diffrn_radiation.polarizn_Stokes_V'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_type.code               float
     save_

save__diffrn_radiation.polarizn_Stokes_V_esd
    _item_description.description
;              The setimated standard deviation of
                   _diffrn_radiation.polarizn_Stokes_V,
               +/-2*sqrt(IpIn), with a + sign for right-handed circular
               polarization, where where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization and In is the intensity (amplitude squared) of
               the electric vector in the plane of the normal to the
               plane of polarization, and theta is the angle as viewed
               from the specimen, between the normal to the polarization
               plane and the laboratory Y axis as defined in the
               AXIS category.
;
    _item.name                  '_diffrn_radiation.polarizn_Stokes_V_esd'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .      0.0
                                  0.0    0.0
    _item_type.code               float
    loop_
    _item_related.related_name
    _item_related.function_code  '_diffrn_radiation.polarizn_Stokes_V'
                                 'associated_value'
     save_




save__diffrn_radiation.probe
    _item_description.description
;              Name of the type of radiation used. It is strongly
               recommended that this be given so that the
               probe radiation is clearly specified.
;
    _item.name                  '_diffrn_radiation.probe'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_radiation_probe'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
    _item_type.code               line
     loop_
    _item_enumeration.value      'X-ray'
                                 'neutron'
                                 'electron'
                                 'gamma'
     save_

save__diffrn_radiation.type
    _item_description.description
;              The nature of the radiation. This is typically a description
               of the X-ray wavelength in Siegbahn notation.
;
    _item.name                  '_diffrn_radiation.type'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_radiation_type'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
    _item_type.code               line
     loop_
    _item_examples.case          'CuK\a'
                                 'Cu K\a~1~'
                                 'Cu K-L~2,3~'
                                 'white-beam'

     save_

save__diffrn_radiation.xray_symbol
    _item_description.description
;              The IUPAC symbol for the X-ray wavelength for the probe
               radiation.
;
    _item.name                  '_diffrn_radiation.xray_symbol'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
    _item_aliases.alias_name    '_diffrn_radiation_xray_symbol'
    _item_aliases.dictionary      cif_core.dic
    _item_aliases.version         2.0.1
    _item_type.code               line
     loop_
    _item_enumeration.value
    _item_enumeration.detail     'K-L~3~'
                                 'K\a~1~ in older Siegbahn notation'
                                 'K-L~2~'
                                 'K\a~2~ in older Siegbahn notation'
                                 'K-M~3~'
                                 'K\b~1~ in older Siegbahn notation'
                                 'K-L~2,3~'
                                 'use where K-L~3~ and K-L~2~ are not resolved'
     save_

save__diffrn_radiation.wavelength_id
    _item_description.description
;              This data item is a pointer to
               _diffrn_radiation_wavelength.id in the
               DIFFRN_RADIATION_WAVELENGTH category.
;
    _item.name                  '_diffrn_radiation.wavelength_id'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          yes
    _item_type.code               code
     save_


save__diffrn_radiation.variant
    _item_description.description
;             The value of _diffrn_radiation.variant gives the variant
              to which the given DIFFRN_RADIATION row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_radiation.variant'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          implicit
    _item_type.code               code
     save_



################
# DIFFRN_REFLN #
################


save_diffrn_refln
    _category.description
;    This category redefinition has been added to extend the key of
     the standard DIFFRN_REFLN category.

     Data items in the DIFFRN_REFLN category record details about
     the intensities in the diffraction data set
     identified by _diffrn_refln.diffrn_id.

     The DIFFRN_REFLN data items refer to individual intensity
     measurements and must be included in looped lists.

     The DIFFRN_REFLNS data items specify the parameters that apply
     to all intensity  measurements in the particular diffraction
     data set identified by _diffrn_reflns.diffrn_id and
     _diffrn_refln.frame_id
;
    _category.id                   diffrn_refln
    _category.mandatory_code       no
    _category.NX_mapping_details
;
    This category will be addressed at a future date.
;

     loop_
    _category_key.name             '_diffrn_refln.diffrn_id'
                                   '_diffrn_refln.id'
                                   '_diffrn_refln.frame_id'
                                   '_diffrn_refln.variant'
     loop_
    _category_group.id             'inclusive_group'
                                   'diffrn_group'
     save_


save__diffrn_refln.frame_id
    _item_description.description
;              This item is a pointer to _diffrn_data_frame.id
               in the DIFFRN_DATA_FRAME category.
;
    _item.name                  '_diffrn_refln.frame_id'
    _item.category_id             diffrn_refln
    _item.mandatory_code          yes
    _item_type.code               code
     save_

save__diffrn_refln.variant
    _item_description.description
;             The value of _diffrn_refln.variant gives the variant
              to which the given DIFFRN_REFLN row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_refln.variant'
    _item.category_id             diffrn_refln
    _item.mandatory_code          implicit
    _item_type.code               code
     save_

save__diffrn_refln.id
    _item_description.description
;              This item is a placeholder for the definition in the PDBx/mmCIF dictionary.
;
    _item.name                  '_diffrn_refln.id'
    _item.category_id             diffrn_refln
    _item.mandatory_code          yes
    _item_type.code               code
     save_
   
save__diffrn_refln.diffrn_id
    _item_description.description
;              This item is a placeholder for the definition in the PDBx/mmCIF dictionary
;
    _item.name                  '_diffrn_refln.diffrn_id'
    _item.category_id             diffrn_refln
    _item.mandatory_code          yes
    _item_type.code               code
     save_
   


###############
# DIFFRN_SCAN #
###############

save_diffrn_scan
    _category.description
;    Data items in the DIFFRN_SCAN category describe the parameters of one
     or more scans, relating axis positions to frames.

;
    _category.id                   diffrn_scan
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _diffrn_scan.id SCANID
    _diffrn_scan.date_end ENDDATETIME
    _diffrn_scan.date_end_estimated ENDDATETIMEEST
    _diffrn_scan.date_start STARTDATETIME
    _diffrn_scan.integration_time AVGCOUNTTIME
    _diffrn_scan.frame_id_start FRAMESTARTID
    _diffrn_scan.frame_id_end FRAMEENDID
    _diffrn_scan.frames FRAMES
    _diffrn_scan.time_period TIMEPER
    _diffrn_scan.time_rstrt_incr RSTRTTIME
   
    -->
   
        /entry:NXentry
          /CBF_scan_id="SCANID"
          /end_time=ENDDATETIME
          /end_time_estimated=ENDDATETIMEEST
          /start_time=STARTDATETIME
          /average_count_time=AVGCOUNTTIME
            @units="sec"
          /average_frame_time=TIMEPER
            @units="sec"
          /average_frame_restart_time=RSTRTTIME
            @units="sec"
          /instrument:NXinstrument
           /DETECTORNAME:NXdetector_group
           /DETECTORELEMENTNAME:NXdetector
              /frame_start_number=FRAMESTARTNO
              /frame_end_number=FRAMEENDNO
   
    FRAMESTARTNO is the value of _diffrn_scan_frame.frame_number
    for which the value of _diffrn_scan_frame.frame_id equals FRAMESTARTID
    FRAMEENDNO is the value of _diffrn_scan_frame.frame_number
    for which the value of _diffrn_scan_frame.frame_id equals FRAMEENDID

   
;
     loop_
    _category_key.name            '_diffrn_scan.id'
                                  '_diffrn_scan.variant'
     loop_
    _category_group.id            'inclusive_group'
                                  'diffrn_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;   Example 1 - derived from a suggestion by R. M. Sweet.

   The vector of each axis is not given here, because it is provided in
   the AXIS category.  By making _diffrn_scan_axis.scan_id and
   _diffrn_scan_axis.axis_id keys of the DIFFRN_SCAN_AXIS category,
   an arbitrary number of scanning and fixed axes can be specified for a
   scan.  In this example, three rotation axes and one translation axis
   at nonzero values are specified, with one axis stepping.  There is no
   reason why more axes could not have been specified to step. Range
   information has been specified, but note that it can be calculated from
   the  number of frames and the increment, so the data item
   _diffrn_scan_axis.angle_range could be dropped.

   Both the sweep data and the data for a single frame are specified.

   Note that the information on how the axes are stepped is given twice,
   once in terms of the overall averages in the value of
   _diffrn_scan.integration_time and the values for DIFFRN_SCAN_AXIS,
   and precisely for the given frame in the value for
   _diffrn_scan_frame.integration_time and the values for
   DIFFRN_SCAN_FRAME_AXIS.  If dose-related adjustments are made to
   scan times and nonlinear stepping is done, these values may differ.
   Therefore, in interpreting the data for a particular frame it is
   important to use the frame-specific data.

   There are three date/times in this set: date_start, and date_end_estimated, both of which
   are mandatory, because the former is data which can be logged at the start of collection
   and the latter is data than can be estimated at the same time, and date_end which can only
   be logged exactly if the data collection completes normally.
;
;
      _diffrn_scan.id                   1
      _diffrn_scan.date_start         '2001-11-18T03:26:42'
      _diffrn_scan.date_end_estimated '2001-11-18T03:36:45'
      _diffrn_scan.date_end           '2001-11-18T03:36:45'
      _diffrn_scan.integration_time    3.0
      _diffrn_scan.frame_id_start      mad_L2_000
      _diffrn_scan.frame_id_end        mad_L2_200
      _diffrn_scan.frames              201

       loop_
      _diffrn_scan_axis.scan_id
      _diffrn_scan_axis.axis_id
      _diffrn_scan_axis.angle_start
      _diffrn_scan_axis.angle_range
      _diffrn_scan_axis.angle_increment
      _diffrn_scan_axis.displacement_start
      _diffrn_scan_axis.displacement_range
      _diffrn_scan_axis.displacement_increment

       1 omega 200.0 20.0 0.1 . . .
       1 kappa -40.0  0.0 0.0 . . .
       1 phi   127.5  0.0 0.0 . . .
       1 tranz  . . .   2.3 0.0 0.0

      _diffrn_scan_frame.scan_id                   1
      _diffrn_scan_frame.date               '2001-11-18T03:27:33'
      _diffrn_scan_frame.integration_time    3.0
      _diffrn_scan_frame.frame_id            mad_L2_018
      _diffrn_scan_frame.frame_number        18

      loop_
      _diffrn_scan_frame_axis.frame_id
      _diffrn_scan_frame_axis.axis_id
      _diffrn_scan_frame_axis.angle
      _diffrn_scan_frame_axis.angle_increment
      _diffrn_scan_frame_axis.displacement
      _diffrn_scan_frame_axis.displacement_increment

       mad_L2_018 omega 201.8  0.1 . .
       mad_L2_018 kappa -40.0  0.0 . .
       mad_L2_018 phi   127.5  0.0 . .
       mad_L2_018 tranz  .     .  2.3 0.0
;

;  Example 2 - a more extensive example (R. M. Sweet, P. J. Ellis &
   H. J. Bernstein).

   A detector is placed 240 mm along the Z axis from the goniometer.
   This leads to a choice:  either the axes of
   the detector are defined at the origin, and then a Z setting of -240
   is entered, or the axes are defined with the necessary Z offset.
   In this case, the setting is used and the offset is left as zero.
   This axis is called DETECTOR_Z.

   The axis for positioning the detector in the Y direction depends
   on the detector Z axis.  This axis is called DETECTOR_Y.

   The axis for positioning the detector in the X direction depends
   on the detector Y axis (and therefore on the detector Z axis).
   This axis is called DETECTOR_X.

   This detector may be rotated around the Y axis.  This rotation axis
   depends on the three translation axes.  It is called DETECTOR_PITCH.

   A coordinate system is defined on the face of the detector in terms of
   2300 0.150 mm pixels in each direction.  The ELEMENT_X axis is used to
   index the first array index of the data array and the ELEMENT_Y
   axis is used to index the second array index.  Because the pixels
   are 0.150mm X 0.150mm, the centre of the first pixel is at (0.075,
   0.075) in this coordinate system.
;

;    ###CBF: VERSION 1.1

     data_image_1

     # category DIFFRN
     _diffrn.id P6MB
     _diffrn.crystal_id P6MB_CRYSTAL7

     # category DIFFRN_SOURCE
     loop_
     _diffrn_source.diffrn_id
     _diffrn_source.source
     _diffrn_source.type
      P6MB synchrotron 'SSRL beamline 9-1'

     # category DIFFRN_RADIATION
     loop_
     _diffrn_radiation.diffrn_id
     _diffrn_radiation.wavelength_id
     _diffrn_radiation.monochromator
     _diffrn_radiation.polarizn_source_ratio
     _diffrn_radiation.polarizn_source_norm
     _diffrn_radiation.div_x_source
     _diffrn_radiation.div_y_source
     _diffrn_radiation.div_x_y_source
      P6MB WAVELENGTH1 'Si 111' 0.8 0.0 0.08
     0.01 0.00

     # category DIFFRN_RADIATION_WAVELENGTH
     loop_
     _diffrn_radiation_wavelength.id
     _diffrn_radiation_wavelength.wavelength
     _diffrn_radiation_wavelength.wt
      WAVELENGTH1 0.98 1.0

     # category DIFFRN_DETECTOR
     loop_
     _diffrn_detector.diffrn_id
     _diffrn_detector.id
     _diffrn_detector.type
     _diffrn_detector.number_of_axes
      P6MB MAR345-SN26 'MAR 345' 4

     # category DIFFRN_DETECTOR_AXIS
     loop_
     _diffrn_detector_axis.detector_id
     _diffrn_detector_axis.axis_id
      MAR345-SN26 DETECTOR_X
      MAR345-SN26 DETECTOR_Y
      MAR345-SN26 DETECTOR_Z
      MAR345-SN26 DETECTOR_PITCH

     # category DIFFRN_DETECTOR_ELEMENT
     loop_
     _diffrn_detector_element.id
     _diffrn_detector_element.detector_id
      ELEMENT1 MAR345-SN26

     # category DIFFRN_DATA_FRAME
     loop_
     _diffrn_data_frame.id
     _diffrn_data_frame.detector_element_id
     _diffrn_data_frame.array_id
     _diffrn_data_frame.binary_id
      FRAME1 ELEMENT1 ARRAY1 1

     # category DIFFRN_MEASUREMENT
     loop_
     _diffrn_measurement.diffrn_id
     _diffrn_measurement.id
     _diffrn_measurement.number_of_axes
     _diffrn_measurement.method
      P6MB GONIOMETER 3 rotation

     # category DIFFRN_MEASUREMENT_AXIS
     loop_
     _diffrn_measurement_axis.measurement_id
     _diffrn_measurement_axis.axis_id
      GONIOMETER GONIOMETER_PHI
      GONIOMETER GONIOMETER_KAPPA
      GONIOMETER GONIOMETER_OMEGA

     # category DIFFRN_SCAN
     loop_
     _diffrn_scan.id
     _diffrn_scan.frame_id_start
     _diffrn_scan.frame_id_end
     _diffrn_scan.frames
      SCAN1 FRAME1 FRAME1 1

     # category DIFFRN_SCAN_AXIS
     loop_
     _diffrn_scan_axis.scan_id
     _diffrn_scan_axis.axis_id
     _diffrn_scan_axis.angle_start
     _diffrn_scan_axis.angle_range
     _diffrn_scan_axis.angle_increment
     _diffrn_scan_axis.displacement_start
     _diffrn_scan_axis.displacement_range
     _diffrn_scan_axis.displacement_increment
      SCAN1 GONIOMETER_OMEGA 12.0 1.0 1.0 0.0 0.0 0.0
      SCAN1 GONIOMETER_KAPPA 23.3 0.0 0.0 0.0 0.0 0.0
      SCAN1 GONIOMETER_PHI -165.8 0.0 0.0 0.0 0.0 0.0
      SCAN1 DETECTOR_Z 0.0 0.0 0.0 -240.0 0.0 0.0
      SCAN1 DETECTOR_Y 0.0 0.0 0.0 0.6 0.0 0.0
      SCAN1 DETECTOR_X 0.0 0.0 0.0 -0.5 0.0 0.0
      SCAN1 DETECTOR_PITCH 0.0 0.0 0.0 0.0 0.0 0.0

     # category DIFFRN_SCAN_FRAME
     loop_
     _diffrn_scan_frame.frame_id
     _diffrn_scan_frame.frame_number
     _diffrn_scan_frame.integration_time
     _diffrn_scan_frame.scan_id
     _diffrn_scan_frame.date
      FRAME1 1 20.0 SCAN1 1997-12-04T10:23:48

     # category DIFFRN_SCAN_FRAME_AXIS
     loop_
     _diffrn_scan_frame_axis.frame_id
     _diffrn_scan_frame_axis.axis_id
     _diffrn_scan_frame_axis.angle
     _diffrn_scan_frame_axis.displacement
      FRAME1 GONIOMETER_OMEGA 12.0 0.0
      FRAME1 GONIOMETER_KAPPA 23.3 0.0
      FRAME1 GONIOMETER_PHI -165.8 0.0
      FRAME1 DETECTOR_Z 0.0 -240.0
      FRAME1 DETECTOR_Y 0.0 0.6
      FRAME1 DETECTOR_X 0.0 -0.5
      FRAME1 DETECTOR_PITCH 0.0 0.0

     # category AXIS
     loop_
     _axis.id
     _axis.type
     _axis.equipment
     _axis.depends_on
     _axis.vector[1] _axis.vector[2] _axis.vector[3]
     _axis.offset[1] _axis.offset[2] _axis.offset[3]
      GONIOMETER_OMEGA rotation goniometer . 1 0 0 . . .
      GONIOMETER_KAPPA rotation goniometer GONIOMETER_OMEGA 0.64279
      0 0.76604 . . .
      GONIOMETER_PHI   rotation goniometer GONIOMETER_KAPPA 1 0 0
     . . .
      SOURCE           general source . 0 0 1 . . .
      GRAVITY          general gravity . 0 -1 0 . . .
      DETECTOR_Z       translation detector . 0 0 1 0 0 0
      DETECTOR_Y       translation detector DETECTOR_Z 0 1 0 0 0 0
      DETECTOR_X       translation detector DETECTOR_Y 1 0 0 0 0 0
      DETECTOR_PITCH   rotation    detector DETECTOR_X 0 1 0 0 0 0
      ELEMENT_X        translation detector DETECTOR_PITCH
     1 0 0 172.43 -172.43 0
      ELEMENT_Y        translation detector ELEMENT_X
     0 1 0 0 0 0

     # category ARRAY_STRUCTURE_LIST
     loop_
     _array_structure_list.array_id
     _array_structure_list.index
     _array_structure_list.dimension
     _array_structure_list.precedence
     _array_structure_list.direction
     _array_structure_list.axis_set_id
      ARRAY1 1 2300 1 increasing ELEMENT_X
      ARRAY1 2 2300 2 increasing ELEMENT_Y

     # category ARRAY_STRUCTURE_LIST_AXIS
     loop_
     _array_structure_list_axis.axis_set_id
     _array_structure_list_axis.axis_id
     _array_structure_list_axis.displacement
     _array_structure_list_axis.displacement_increment
      ELEMENT_X ELEMENT_X 0.075 0.150
      ELEMENT_Y ELEMENT_Y 0.075 0.150

     # category ARRAY_ELEMENT_SIZE
     loop_
     _array_element_size.array_id
     _array_element_size.index
     _array_element_size.size
      ARRAY1 1 150e-6
      ARRAY1 2 150e-6

     # category ARRAY_INTENSITIES
     loop_
     _array_intensities.array_id
     _array_intensities.binary_id
     _array_intensities.linearity
     _array_intensities.gain
     _array_intensities.gain_esd
     _array_intensities.overload
     _array_intensities.undefined_value
      ARRAY1 1 linear 1.15 0.2 240000 0

      # category ARRAY_STRUCTURE
      loop_
      _array_structure.id
      _array_structure.encoding_type
      _array_structure.compression_type
      _array_structure.byte_order
      ARRAY1 "signed 32-bit integer" packed little_endian

     # category ARRAY_DATA
     loop_
     _array_data.array_id
     _array_data.binary_id
     _array_data.data
      ARRAY1 1
     ;
     --CIF-BINARY-FORMAT-SECTION--
     Content-Type: application/octet-stream;
         conversions="X-CBF_PACKED"
     Content-Transfer-Encoding: BASE64
     X-Binary-Size: 3801324
     X-Binary-ID: 1
     X-Binary-Element-Type: "signed 32-bit integer"
     Content-MD5: 07lZFvF+aOcW85IN7usl8A==

     AABRAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAZBQSr1sKNBOeOe9HITdMdDUnbq7bg
     ...
     8REo6TtBrxJ1vKqAvx9YDMD6J18Qg83OMr/tgssjMIJMXATDsZobL90AEXc4KigE

     --CIF-BINARY-FORMAT-SECTION----
     ;
;

;   Example 3 - Example 2 revised for a spiral scan (R. M. Sweet,
    P. J. Ellis & H. J. Bernstein).

   A detector is placed 240 mm along the Z axis from the
   goniometer, as in Example 2 above, but in this example the
   image plate is scanned in a spiral pattern from the outside edge in.

   The axis for positioning the detector in the Y direction depends
   on the detector Z axis.  This axis is called DETECTOR_Y.

   The axis for positioning the detector in the X direction depends
   on the detector Y axis (and therefore on the detector Z axis).
   This axis is called DETECTOR_X.

   This detector may be rotated around the Y axis.  This rotation axis
   depends on the three translation axes.  It is called DETECTOR_PITCH.

   A coordinate system is defined on the face of the detector in
   terms of a coupled rotation axis and radial scan axis to form
   a spiral scan.  The rotation axis is called  ELEMENT_ROT  and the
   radial axis is called ELEMENT_RAD.  A 150 micrometre radial pitch
   and a 75 micrometre 'constant velocity' angular pitch are assumed.

   Indexing is carried out first on the rotation axis and the radial axis
   is made to be dependent on it.

   The two axes are coupled to form an axis set ELEMENT_SPIRAL.
;
;    ###CBF: VERSION 1.1

     data_image_1

     # category DIFFRN
     _diffrn.id P6MB
     _diffrn.crystal_id P6MB_CRYSTAL7

     # category DIFFRN_SOURCE
     loop_
     _diffrn_source.diffrn_id
     _diffrn_source.source
     _diffrn_source.type
      P6MB synchrotron 'SSRL beamline 9-1'

     # category DIFFRN_RADIATION
          loop_
     _diffrn_radiation.diffrn_id
     _diffrn_radiation.wavelength_id
     _diffrn_radiation.monochromator
     _diffrn_radiation.polarizn_source_ratio
     _diffrn_radiation.polarizn_source_norm
     _diffrn_radiation.div_x_source
     _diffrn_radiation.div_y_source
     _diffrn_radiation.div_x_y_source
      P6MB WAVELENGTH1 'Si 111' 0.8 0.0 0.08
     0.01 0.00

     # category DIFFRN_RADIATION_WAVELENGTH
     loop_
     _diffrn_radiation_wavelength.id
     _diffrn_radiation_wavelength.wavelength
     _diffrn_radiation_wavelength.wt
      WAVELENGTH1 0.98 1.0

     # category DIFFRN_DETECTOR
     loop_
     _diffrn_detector.diffrn_id
     _diffrn_detector.id
     _diffrn_detector.type
     _diffrn_detector.number_of_axes
      P6MB MAR345-SN26 'MAR 345' 4

     # category DIFFRN_DETECTOR_AXIS
     loop_
     _diffrn_detector_axis.detector_id
     _diffrn_detector_axis.axis_id
      MAR345-SN26 DETECTOR_X
      MAR345-SN26 DETECTOR_Y
      MAR345-SN26 DETECTOR_Z
      MAR345-SN26 DETECTOR_PITCH

     # category DIFFRN_DETECTOR_ELEMENT
     loop_
     _diffrn_detector_element.id
     _diffrn_detector_element.detector_id
      ELEMENT1 MAR345-SN26

     # category DIFFRN_DATA_FRAME
     loop_
     _diffrn_data_frame.id
     _diffrn_data_frame.detector_element_id
     _diffrn_data_frame.array_id
     _diffrn_data_frame.binary_id
      FRAME1 ELEMENT1 ARRAY1 1

     # category DIFFRN_MEASUREMENT
     loop_
     _diffrn_measurement.diffrn_id
     _diffrn_measurement.id
     _diffrn_measurement.number_of_axes
     _diffrn_measurement.method
      P6MB GONIOMETER 3 rotation

     # category DIFFRN_MEASUREMENT_AXIS
     loop_
     _diffrn_measurement_axis.measurement_id
     _diffrn_measurement_axis.axis_id
      GONIOMETER GONIOMETER_PHI
      GONIOMETER GONIOMETER_KAPPA
      GONIOMETER GONIOMETER_OMEGA

     # category DIFFRN_SCAN
     loop_
     _diffrn_scan.id
     _diffrn_scan.frame_id_start
     _diffrn_scan.frame_id_end
     _diffrn_scan.frames
      SCAN1 FRAME1 FRAME1 1

     # category DIFFRN_SCAN_AXIS
     loop_
     _diffrn_scan_axis.scan_id
     _diffrn_scan_axis.axis_id
     _diffrn_scan_axis.angle_start
     _diffrn_scan_axis.angle_range
     _diffrn_scan_axis.angle_increment
     _diffrn_scan_axis.displacement_start
     _diffrn_scan_axis.displacement_range
     _diffrn_scan_axis.displacement_increment
      SCAN1 GONIOMETER_OMEGA 12.0 1.0 1.0 0.0 0.0 0.0
      SCAN1 GONIOMETER_KAPPA 23.3 0.0 0.0 0.0 0.0 0.0
      SCAN1 GONIOMETER_PHI -165.8 0.0 0.0 0.0 0.0 0.0
      SCAN1 DETECTOR_Z 0.0 0.0 0.0 -240.0 0.0 0.0
      SCAN1 DETECTOR_Y 0.0 0.0 0.0 0.6 0.0 0.0
      SCAN1 DETECTOR_X 0.0 0.0 0.0 -0.5 0.0 0.0
      SCAN1 DETECTOR_PITCH 0.0 0.0 0.0 0.0 0.0 0.0

     # category DIFFRN_SCAN_FRAME
     loop_
     _diffrn_scan_frame.frame_id
     _diffrn_scan_frame.frame_number
     _diffrn_scan_frame.integration_time
     _diffrn_scan_frame.scan_id
     _diffrn_scan_frame.date
      FRAME1 1 20.0 SCAN1 1997-12-04T10:23:48

     # category DIFFRN_SCAN_FRAME_AXIS
     loop_
     _diffrn_scan_frame_axis.frame_id
     _diffrn_scan_frame_axis.axis_id
     _diffrn_scan_frame_axis.angle
     _diffrn_scan_frame_axis.displacement
      FRAME1 GONIOMETER_OMEGA 12.0 0.0
      FRAME1 GONIOMETER_KAPPA 23.3 0.0
      FRAME1 GONIOMETER_PHI -165.8 0.0
      FRAME1 DETECTOR_Z 0.0 -240.0
      FRAME1 DETECTOR_Y 0.0 0.6
      FRAME1 DETECTOR_X 0.0 -0.5
      FRAME1 DETECTOR_PITCH 0.0 0.0

     # category AXIS
     loop_
     _axis.id
     _axis.type
     _axis.equipment
     _axis.depends_on
     _axis.vector[1] _axis.vector[2] _axis.vector[3]
     _axis.offset[1] _axis.offset[2] _axis.offset[3]
      GONIOMETER_OMEGA rotation goniometer . 1 0 0 . . .
      GONIOMETER_KAPPA rotation goniometer GONIOMETER_OMEGA 0.64279
      0 0.76604 . . .
      GONIOMETER_PHI   rotation goniometer GONIOMETER_KAPPA 1 0 0
     . . .
      SOURCE           general source . 0 0 1 . . .
      GRAVITY          general gravity . 0 -1 0 . . .
      DETECTOR_Z       translation detector . 0 0 1 0 0 0
      DETECTOR_Y       translation detector DETECTOR_Z 0 1 0 0 0 0
      DETECTOR_X       translation detector DETECTOR_Y 1 0 0 0 0 0
      DETECTOR_PITCH   rotation    detector DETECTOR_X 0 1 0 0 0 0
      ELEMENT_ROT      translation detector DETECTOR_PITCH 0 0 1 0 0 0
      ELEMENT_RAD      translation detector ELEMENT_ROT 0 1 0 0 0 0

     # category ARRAY_STRUCTURE_LIST
     loop_
     _array_structure_list.array_id
     _array_structure_list.index
     _array_structure_list.dimension
     _array_structure_list.precedence
     _array_structure_list.direction
     _array_structure_list.axis_set_id
      ARRAY1 1 8309900 1 increasing ELEMENT_SPIRAL

     # category ARRAY_STRUCTURE_LIST_AXIS
     loop_
     _array_structure_list_axis.axis_set_id
     _array_structure_list_axis.axis_id
     _array_structure_list_axis.angle
     _array_structure_list_axis.displacement
     _array_structure_list_axis.angular_pitch
     _array_structure_list_axis.radial_pitch
      ELEMENT_SPIRAL ELEMENT_ROT 0    .  0.075   .
      ELEMENT_SPIRAL ELEMENT_RAD . 172.5  .    -0.150

     # category ARRAY_ELEMENT_SIZE
     # the actual pixels are 0.075 by 0.150 mm
     # We give the coarser dimension here.
     loop_
     _array_element_size.array_id
     _array_element_size.index
     _array_element_size.size
      ARRAY1 1 150e-6

     # category ARRAY_INTENSITIES
     loop_
     _array_intensities.array_id
     _array_intensities.binary_id
     _array_intensities.linearity
     _array_intensities.gain
     _array_intensities.gain_esd
     _array_intensities.overload
     _array_intensities.undefined_value
      ARRAY1 1 linear 1.15 0.2 240000 0

      # category ARRAY_STRUCTURE
      loop_
      _array_structure.id
      _array_structure.encoding_type
      _array_structure.compression_type
      _array_structure.byte_order
      ARRAY1 "signed 32-bit integer" packed little_endian

     # category ARRAY_DATA
     loop_
     _array_data.array_id
     _array_data.binary_id
     _array_data.data
      ARRAY1 1
     ;
     --CIF-BINARY-FORMAT-SECTION--
     Content-Type: application/octet-stream;
         conversions="X-CBF_PACKED"
     Content-Transfer-Encoding: BASE64
     X-Binary-Size: 3801324
     X-Binary-ID: 1
     X-Binary-Element-Type: "signed 32-bit integer"
     Content-MD5: 07lZFvF+aOcW85IN7usl8A==

     AABRAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAZBQSr1sKNBOeOe9HITdMdDUnbq7bg
     ...
     8REo6TtBrxJ1vKqAvx9YDMD6J18Qg83OMr/tgssjMIJMXATDsZobL90AEXc4KigE

     --CIF-BINARY-FORMAT-SECTION----
     ;
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
       save_


save__diffrn_scan.id
    _item_description.description
;             The value of _diffrn_scan.id uniquely identifies each
              scan.  The identifier is used to tie together all the
              information about the scan.
;
     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
       '_diffrn_scan.id'                 diffrn_scan             yes
       '_diffrn_scan_axis.scan_id'       diffrn_scan_axis        yes
       '_diffrn_scan_collection.scan_id'       diffrn_scan_collection        implicit
       '_diffrn_scan_frame.scan_id'      diffrn_scan_frame       yes
    _item_type.code               code
     loop_
    _item_linked.child_name
    _item_linked.parent_name
       '_diffrn_scan_axis.scan_id'          '_diffrn_scan.id'
       '_diffrn_scan_axis.scan_id'          '_diffrn_scan.id'
       '_diffrn_scan_frame.scan_id'         '_diffrn_scan.id'
     save_


save__diffrn_scan.date_end
    _item_description.description
;              The date and time of the end of the scan.  Note that this
               may be an estimate generated during the scan, before the
               precise time of the end of the scan is known, in which
               case _diffrn_scan.date_end_estimated should be used instead.
;
    _item.name                 '_diffrn_scan.date_end'
    _item.category_id          diffrn_scan
    _item.mandatory_code       no
    _item_type.code            yyyy-mm-dd
     save_

save__diffrn_scan.date_end_estimated
    _item_description.description
;              The estimated date and time of the end of the scan.  Note
               that this may be generated at the start or during the scan, before the
               precise time of the end of the scan is known.
;
    _item.name                 '_diffrn_scan.date_end_estimated'
    _item.category_id          diffrn_scan
    _item.mandatory_code       yes
    _item_type.code            yyyy-mm-dd
     save_


save__diffrn_scan.date_start
    _item_description.description
;              The date and time of the start of the scan.
;
    _item.name                 '_diffrn_scan.date_start'
    _item.category_id          diffrn_scan
    _item.mandatory_code       yes
    _item_type.code            yyyy-mm-dd
     save_


save__diffrn_scan.integration_time
    _item_description.description
;              Approximate average time in seconds to integrate each
               step of the scan.  The precise time for integration
               of each particular step must be provided in
               _diffrn_scan_frame.integration_time, even
               if all steps have the same integration time.
;
    _item.name                 '_diffrn_scan.integration_time'
    _item.category_id          diffrn_scan
    _item.mandatory_code       no
    _item_type.code            float
    _item_units.code           'seconds'
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0.0
     save_


save__diffrn_scan.frame_id_start
    _item_description.description
;              The value of this data item is the identifier of the
               first frame in the scan.

               This item is a pointer to _diffrn_data_frame.id in the
               DIFFRN_DATA_FRAME category.
;
    _item.name                 '_diffrn_scan.frame_id_start'
    _item.category_id          diffrn_scan
    _item.mandatory_code       yes
    _item_type.code            code
     save_


save__diffrn_scan.frame_id_end
    _item_description.description
;              The value of this data item is the identifier of the
               last frame in the scan.

               This item is a pointer to _diffrn_data_frame.id in the
               DIFFRN_DATA_FRAME category.
;
    _item.name                 '_diffrn_scan.frame_id_end'
    _item.category_id          diffrn_scan
    _item.mandatory_code       yes
    _item_type.code            code
     save_


save__diffrn_scan.frames
    _item_description.description
;              The value of this data item is the number of frames in
               the scan.
;
    _item.name                 '_diffrn_scan.frames'
    _item.category_id          diffrn_scan
    _item.mandatory_code       no
    _item_type.code            int
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   1
                            1   1
     save_
    
save__diffrn_scan.time_period
    _item_description.description
;              Approximate average time in seconds between the start
               of each step of the scan.  The precise start-to-start
               time increment of each particular step may be provided in
               _diffrn_scan_frame.time_period.
;
    _item.name                 '_diffrn_scan.time_period'
    _item.category_id          diffrn_scan
    _item.mandatory_code       no
    _item_type.code            float
    _item_units.code           'seconds'
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0.0
     save_


save__diffrn_scan.time_rstrt_incr
    _item_description.description
;              Approximate average time in seconds between the end
               of integration of each step of the scan than the start
               of integration of the next step.
             
               In general, this will agree with
               _diffrn_scan_frame.time_rstrt_incr.  The
               sum of the values of _diffrn_scan_frame.integration_time
               and  _diffrn_scan_frame.time_rstrt_incr is the
               time from the start of integration of one frame and the start of
               integration for the next frame and should equal the value of
               _diffrn_scan_frame.time_period for this
               frame.   If the individual frame values vary, then the value of
               _diffrn_scan.time_rstrt_incr will be
               representative of the ensemble of values of
               _diffrn_scan_frame_axis.time_rstrt_incr (e.g.
               the mean).
;
    _item.name                 '_diffrn_scan.time_rstrt_incr'
    _item.category_id          diffrn_scan
    _item.mandatory_code       no
    _item_type.code            float
    _item_units.code           'seconds'
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0.0
     save_


save__diffrn_scan.variant
    _item_description.description
;             The value of _diffrn_scan.variant gives the variant
              to which the given DIFFRN_SCAN row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.

             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_scan.variant'
    _item.category_id             diffrn_scan
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


####################
# DIFFRN_SCAN_AXIS #
####################

save_diffrn_scan_axis
    _category.description
;    Data items in the DIFFRN_SCAN_AXIS category describe the settings of
     axes for particular scans.  Unspecified axes are assumed to be at
     their zero points.
;
    _category.id                   diffrn_scan_axis
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _diffrn_scan_axis.axis_id AXISID-->
    _diffrn_scan_axis.angle_start ANGSTART
    _diffrn_scan_axis.angle_range ANGRANGE
    _diffrn_scan_axis.angle_increment ANGINC
    _diffrn_scan_axis.angle_rstrt_incr ANGRSTRT
    _diffrn_scan_axis.displacement_start DISPSTART
    _diffrn_scan_axis.displacement_range DISPRANGE
    _diffrn_scan_axis.displacement_increment DISPINC
    _diffrn_scan_axis.displacement_increment DISPINC
    _diffrn_scan_axis.displacement_rstrt_incr DISPRSTRT
    _diffrn_scan_axis.reference_angle ANG
    _diffrn_scan_axis.reference_displacement DISP
    _diffrn_scan_axis.scan_id SCANID
   
    -->
   
    { /entry:NXentry
      /CBF_scan_id="SCANID"
      /instrument:NXinstrument
       /DETECTORNAME:NXdetector_group
       /DETECTORELEMENTNAME:NXdetector
    for AXISEQUIPMENT=="detector"}
    {  /CBF_diffrn_scan__SCANID:NXentry
         /sample:NXsample
    for AXISEQUIPMENT=="goniometer"}
    {  /CBF_diffrn_scan__SCANID:NXentry
    for AXISEQUIPMENT=="general"}
         /transformations:NXtransformations
           /AXISID=[]
             @diffrn_scan_axis__angle_start=ANGSTART
             @diffrn_scan_axis__angle_range=ANGRANGE
             @diffrn_scan_axis__angle_increment=ANGINC
             @diffrn_scan_axis__angle_rstrt_incr=ANGRSTRT
             @diffrn_scan_axis__displacement_start=DISPSTART
             @diffrn_scan_axis__displacement_range=DISPRANGE
             @diffrn_scan_axis__displacement_increment=DISPINC
             @diffrn_scan_axis__displacement_rstrt_incr=DISPRSTRT
             @diffrn_scan_axis__reference_angle=ANG
             @diffrn_scan_axis__reference_displacement=DISP
    
    
;
     loop_
    _category_key.name
                                  '_diffrn_scan_axis.scan_id'
                                  '_diffrn_scan_axis.axis_id'
                                  '_diffrn_scan_axis.variant'
     loop_
    _category_group.id           'inclusive_group'
                                 'diffrn_group'
     save_


save__diffrn_scan_axis.scan_id
    _item_description.description
;              The value of this data item is the identifier of the
               scan for which axis settings are being specified.

               Multiple axes may be specified for the same value of
               _diffrn_scan.id.

               This item is a pointer to _diffrn_scan.id in the
               DIFFRN_SCAN category.
;
    _item.name                 '_diffrn_scan_axis.scan_id'
    _item.category_id          diffrn_scan_axis
    _item.mandatory_code       yes
    _item_type.code            code
     save_


save__diffrn_scan_axis.axis_id
    _item_description.description
;              The value of this data item is the identifier of one of
               the axes for the scan for which settings are being specified.

               Multiple axes may be specified for the same value of
               _diffrn_scan.id.

               This item is a pointer to _axis.id in the
               AXIS category.
;
    _item.name                 '_diffrn_scan_axis.axis_id'
    _item.category_id          diffrn_scan_axis
    _item.mandatory_code       yes
    _item_type.code            code
     save_


save__diffrn_scan_axis.angle_start
    _item_description.description
;              The starting position for the specified axis in degrees.
;
    _item.name                 '_diffrn_scan_axis.angle_start'
    _item.category_id          diffrn_scan_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'degrees'
     save_


save__diffrn_scan_axis.angle_range
    _item_description.description
;              The range from the starting position for the specified axis
               in degrees.
;
    _item.name                 '_diffrn_scan_axis.angle_range'
    _item.category_id          diffrn_scan_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'degrees'
     save_


save__diffrn_scan_axis.angle_increment
    _item_description.description
;              The increment for each step for the specified axis
               in degrees.  In general, this will agree with
               _diffrn_scan_frame_axis.angle_increment. The
               sum of the values of _diffrn_scan_frame_axis.angle and
               _diffrn_scan_frame_axis.angle_increment is the
               angular setting of the axis at the end of the integration
               time for a given frame.  If the individual frame values
               vary, then the value of
               _diffrn_scan_axis.angle_increment will be
               representative
               of the ensemble of values of
               _diffrn_scan_frame_axis.angle_increment (e.g.
               the mean).
;
    _item.name                 '_diffrn_scan_axis.angle_increment'
    _item.category_id          diffrn_scan_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'degrees'
     save_


save__diffrn_scan_axis.angle_rstrt_incr
    _item_description.description
;              The increment after each step for the specified axis
               in degrees.  In general, this will agree with
               _diffrn_scan_frame_axis.angle_rstrt_incr.  The
               sum of the values of _diffrn_scan_frame_axis.angle,
               _diffrn_scan_frame_axis.angle_increment
               and  _diffrn_scan_frame_axis.angle_rstrt_incr is the
               angular setting of the axis at the start of the integration
               time for the next frame relative to a given frame and
               should equal _diffrn_scan_frame_axis.angle for this
               next frame.   If the individual frame values
               vary, then the value of
               _diffrn_scan_axis.angle_rstrt_incr will be
               representative
               of the ensemble of values of
               _diffrn_scan_frame_axis.angle_rstrt_incr (e.g.
               the mean).
;
    _item.name                 '_diffrn_scan_axis.angle_rstrt_incr'
    _item.category_id          diffrn_scan_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'degrees'
     save_


save__diffrn_scan_axis.displacement_start
    _item_description.description
;              The starting position for the specified axis in millimetres.
;
    _item.name                 '_diffrn_scan_axis.displacement_start'
    _item.category_id          diffrn_scan_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'millimetres'
     save_


save__diffrn_scan_axis.displacement_range
    _item_description.description
;              The range from the starting position for the specified axis
               in millimetres.
;
    _item.name                 '_diffrn_scan_axis.displacement_range'
    _item.category_id          diffrn_scan_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'millimetres'
     save_


save__diffrn_scan_axis.displacement_increment
    _item_description.description
;              The increment for each step for the specified axis
               in millimetres.  In general, this will agree with
               _diffrn_scan_frame_axis.displacement_increment.
               The sum of the values of
               _diffrn_scan_frame_axis.displacement and
               _diffrn_scan_frame_axis.displacement_increment is the
               angular setting of the axis at the end of the integration
               time for a given frame.  If the individual frame values
               vary, then the value of
               _diffrn_scan_axis.displacement_increment will be
               representative
               of the ensemble of values of
               _diffrn_scan_frame_axis.displacement_increment (e.g.
               the mean).
;
    _item.name                 '_diffrn_scan_axis.displacement_increment'
    _item.category_id          diffrn_scan_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'millimetres'
     save_


save__diffrn_scan_axis.displacement_rstrt_incr
    _item_description.description
;              The increment for each step for the specified axis
               in millimetres.  In general, this will agree with
               _diffrn_scan_frame_axis.displacement_rstrt_incr.
               The sum of the values of
               _diffrn_scan_frame_axis.displacement,
               _diffrn_scan_frame_axis.displacement_increment and
               _diffrn_scan_frame_axis.displacement_rstrt_incr is the
               angular setting of the axis at the start of the integration
               time for the next frame relative to a given frame and
               should equal _diffrn_scan_frame_axis.displacement
               for this next frame.  If the individual frame values
               vary, then the value of
               _diffrn_scan_axis.displacement_rstrt_incr will be
               representative
               of the ensemble of values of
               _diffrn_scan_frame_axis.displacement_rstrt_incr (e.g.
               the mean).
;
    _item.name                 '_diffrn_scan_axis.displacement_rstrt_incr'
    _item.category_id          diffrn_scan_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'millimetres'
     save_

save__diffrn_scan_axis.reference_angle
     _item_description.description
;              The setting of the specified axis in degrees
               against which measurements of the reference beam center
               and reference detector distance should be made.

               In general, this will agree with
               _diffrn_scan_frame_axis.reference_angle.

               If the individual frame values vary, then the value of
               _diffrn_scan_axis.reference_angle will be
               representative of the ensemble of values of
               _diffrn_scan_frame_axis.reference_angle (e.g.
               the mean).

               If not specified, the value defaults to zero.
;
     _item.name                 '_diffrn_scan_axis.reference_angle'
     _item.category_id          diffrn_scan_axis
     _item.mandatory_code       implicit
     _item_default.value        0.0
     _item_type.code            float
     _item_units.code           'degrees'
      save_


save__diffrn_scan_axis.reference_displacement
     _item_description.description
;              The setting of the specified axis in millimetres
               against which measurements of the reference beam center
               and reference detector distance should be made.

               In general, this will agree with
               _diffrn_scan_frame_axis.reference_displacement.

               If the individual frame values vary, then the value of
               _diffrn_scan_axis.reference_displacement will be
               representative of the ensemble of values of
               _diffrn_scan_frame_axis.reference_displacement (e.g.
               the mean).

;
     _item.name                 '_diffrn_scan_axis.reference_displacement'
     _item.category_id          diffrn_scan_axis
     _item.mandatory_code       implicit
     _item_type.code            float
     _item_units.code           'millimetres'
      save_

save__diffrn_scan_axis.variant
    _item_description.description
;             The value of _diffrn_scan_axis.variant gives the variant
              to which the given DIFFRN_SCAN_AXIS row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_scan_axis.variant'
    _item.category_id             diffrn_scan_axis
    _item.mandatory_code          implicit
    _item_type.code               code
     save_



##########################
# DIFFRN_SCAN_COLLECTION #
##########################

save_diffrn_scan_collection
    _category.description
;           Data items in the DIFFRN_SCAN_COLLECTION category describe
            the collection strategy for each scan.

            This category is a preliminary version being developed as synchrotron and xfel
            collection strategies evolve.
;
    _category.id                   diffrn_scan_collection
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _diffrn_scan_collection.type  COLLECTIONTYPE
    _diffrn_scan_collection.translation_width TRANSLATION_WIDTH
   
    -->
   
    /entry:NXentry
      /CBF_cbf:NXpdb
        /image1:NXpdb
          @NXpdb="CBF_cbfdb"
          /diffrn_scan_collection:NXpdb
            @NXpdb="CBF_cbfcat"
              /type=["COLLECTIONTYP"]
              /translation_width=["TRANSLATION_WIDTH"]

;
     loop_
    _category_key.name
                                  '_diffrn_scan_collection.scan_id'
                                  '_diffrn_scan_collection.variant'
     loop_
    _category_group.id            'inclusive_group'
                                  'diffrn_group'
     save_

save__diffrn_scan_collection.details
     _item_description.description
;              The value of _diffrn_scan_collection.details should give a
               description of special aspects of each collection strategy.

;
    _item.name                  '_diffrn_scan_collection.details'
    _item.category_id             diffrn_scan_collection
    _item.mandatory_code          no
    _item_type.code               text
     loop_
    _item_examples.case
    _item_examples.detail
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;   Example 1 - Describing a multi-wedge raster scan
;
;
       
        loop_
        _diffrn_scan_collection.scan_id
        _diffrn_scan_collection.details
       
        multi_wedge
    ;
        scan 20 micrometre beam in 100 micrometre steps on 31 by 46 alternating
        raster of 20 degree wedges 
    ;
;

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      save_



save__diffrn_scan_collection.scan_id
    _item_description.description
;             The value of _diffrn_scan_collection.scan_id identifies the scan
              containing this frame.

              This item is a pointer to _diffrn_scan.id in the
              DIFFRN_SCAN category.

              In the case of a single scan dataset, the value is implicit.
;
    _item.name             '_diffrn_scan_collection.scan_id'
    _item.category_id        diffrn_scan_collection
    _item.mandatory_code     implicit
    _item_type.code          code
     save_
    
save__diffrn_scan_collection.type
    _item_description.description
;             The value of _diffrn_scan_collection.type identifies
              strategy used in this scan, e.g. `rotation', 'raster', 'vector', 'still', etc.

              The default is 'rotation'.
;
    _item.name                  '_diffrn_scan_collection.type'
    _item.category_id             diffrn_scan_collection
    _item.mandatory_code          implicit
    _item_default.value           'rotation'
    _item_type.code               text
     save_

save__diffrn_scan_collection.translation_width
    _item_description.description
;             The value of _diffrn_scan_collection.translation_width
              gives the average single step translation in micrometres in collection strategies
              for which this information is appropriate, e.g. 'vector'.
             
;
    _item.name                  '_diffrn_scan_collection.translation_width'
    _item.category_id             diffrn_scan_collection
    _item.mandatory_code          no
    _item_default.value           0.0
    _item_type.code               float
    _item_units.code              micrometres

     save_

save__diffrn_scan_collection.variant
    _item_description.description
;             The value of _diffrn_scan_collection.variant gives the variant
              to which the given DIFFRN_SCAN_COLLECTION row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_scan_collection.variant'
    _item.category_id             diffrn_scan_collection
    _item.mandatory_code          implicit
    _item_type.code               code
     save_





#####################
# DIFFRN_SCAN_FRAME #
#####################

save_diffrn_scan_frame
    _category.description
;           Data items in the DIFFRN_SCAN_FRAME category describe
            the relationships of particular frames to scans.
;
    _category.id                   diffrn_scan_frame
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _diffrn_scan_frame.date  DATETIME
    _diffrn_scan_frame.frame_id ID
    _diffrn_scan_frame.frame_number FRAMENUMBER
    _diffrn_scan_frame.integration_time COUNTTIME
    _diffrn_scan_frame.polarizn_Stokes_I STOKESI
    _diffrn_scan_frame.polarizn_Stokes_Q STOKESQ
    _diffrn_scan_frame.polarizn_Stokes_U STOKESU
    _diffrn_scan_frame.polarizn_Stokes_V STOKESV
    _diffrn_scan_frame.scan_id SCANID
    _diffrn_scan_frame.time_period FRAMETIME
    _diffrn_scan_frame.time_rstrt_incr RSTRTTIME
   
    -->
   
    /entry:NXentry
      /CBF_scan_id="SCANID"
      /instrument:NXinstrument
       /DETECTORNAME:NXdetector_group
       /DETECTORELEMENTNAME:NXdetector
          /CBF_diffrn_scan_frame__date=["DATETIME"]
          /CBF_diffrn_scan_frame__frame_id=["ID"]
          /count_time=[COUNTIME]
          /frame_time=[FRAMETIME]
          /frame_restart_time=[RSTRTTIME]
      /sample:NXsample
        /beam:NXbeam
          /incident_polarisation_stokes=[STOKESI,STOKESQ,STOKESU,STOKESV]
             @units="Watts/meter^2"
     where each array element is inserted at index FRAMENUMBER         

;
     loop_
    _category_key.name
                                  '_diffrn_scan_frame.scan_id'
                                  '_diffrn_scan_frame.frame_id'
                                  '_diffrn_scan_frame.variant'
     loop_
    _category_group.id            'inclusive_group'
                                  'diffrn_group'
     save_


save__diffrn_scan_frame.date
    _item_description.description
;              The date and time of the start of the frame being scanned.
;
    _item.name                 '_diffrn_scan_frame.date'
    _item.category_id          diffrn_scan_frame
    _item.mandatory_code       no
    _item_type.code            yyyy-mm-dd
     save_


save__diffrn_scan_frame.frame_id
    _item_description.description
;              The value of this data item is the identifier of the
               frame being examined.

               This item is a pointer to _diffrn_data_frame.id in the
               DIFFRN_DATA_FRAME category.
;
    _item.name                 '_diffrn_scan_frame.frame_id'
    _item.category_id          diffrn_scan_frame
    _item.mandatory_code       yes
    _item_type.code            code
     save_


save__diffrn_scan_frame.frame_number
    _item_description.description
;              The value of this data item is the number of the frame
               within the scan, starting with 1.  It is not necessarily
               the same as the value of _diffrn_scan_frame.frame_id,
               but it may be.

;
    _item.name                 '_diffrn_scan_frame.frame_number'
    _item.category_id          diffrn_scan_frame
    _item.mandatory_code       no
    _item_type.code            int
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0
                            0   0
     save_


save__diffrn_scan_frame.integration_time
    _item_description.description
;              The time in seconds to integrate this step of the scan.
               This should be the precise time of integration of each
               particular frame.  The value of this data item should
               be given explicitly for each frame and not inferred
               from the value of _diffrn_scan.integration_time.
;
    _item.name                 '_diffrn_scan_frame.integration_time'
    _item.category_id          diffrn_scan_frame
    _item.mandatory_code       yes
    _item_type.code            float
    _item_units.code           'seconds'
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0.0
     save_


save__diffrn_scan_frame.polarizn_Stokes_I
    _item_description.description
;
               Ip+In+Inp, where where Ip is the intensity (amplitude squared)
               of the electric vector in the plane of polarization,
               In is the intensity (amplitude squared) of the electric vector
               in the plane of the normal to the plane of polarization,
               and Inp is the intensity (amplitude squared) of the non-
               polarized (incoherent) electric vector.
   
               This is an average or other representative sample of the
               frame.
   
               This is the first of the Stokes polarization parameters,
               I, Q, U, V (also known as I, M, C, S).  See
               H. H. Berry, G. Gabrielse, A. E. Livingston (1977),
               "Measurement of the Stokes parameters of Light",
               Applied Optics, 16:12, 3200 -- 3205.
   
               If the absolute intensity is not known, the value 1.
               is assumed for I, and all 4 Stokes parameters are
               dimensionless.  When the absolute intensity is known,
               all 4 Stokes parameters are in units of Watts per
               square meter.
   
               Note that, if the polarized intensity Ip+In is required,
               (Ip+In)^2 is the sum of Q^2+U^2+V^2.
   

;
    _item.name                  '_diffrn_scan_frame.polarizn_Stokes_I'
    _item.category_id             diffrn_scan_frame
    _item.mandatory_code          implicit
    _item_default.value           1.0
    loop_
    _item_range.maximum
    _item_range.minimum          
                                   .    0.0
                                  0.0   0.0
    _item_type.code               float
     save_
   
save__diffrn_scan_frame.polarizn_Stokes_I_esd
    _item_description.description
;              The setimated standard deviation of
                   _diffrn_scan_frame.polarizn_Stokes_I,
               Ip+In+Inp, where where Ip is the intensity (amplitude squared)
               of the electric vector in the plane of polarization,
               In is the intensity (amplitude squared) of the electric vector
               in the plane of the normal to the plane of polarization,
               and Inp is the intensity (amplitude squared) of the non-
               polarized (incoherent) electric vector.
;
    _item.name                  '_diffrn_scan_frame.polarizn_Stokes_I_esd'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .      0.0
                                  0.0    0.0
    _item_type.code               float
    loop_
    _item_related.related_name
    _item_related.function_code  '_diffrn_scan_frame.polarizn_Stokes_I'
                                 'associated_value'
     save_

   
save__diffrn_scan_frame.polarizn_Stokes_Q
    _item_description.description
;
               (Ip-In)*cos(2*theta), where where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization, In is the intensity (amplitude squared) of
               the electric vector in the plane of the normal to the
               plane of polarization, and theta is the angle as viewed
               from the specimen, between the normal to the polarization
               plane and the laboratory Y axis as defined in the
               AXIS category.

               This is an average or other representative sample of the
               frame.

               This is the second of the Stokes polarization parameters,
               I, Q, U, V (also known as I, M, C, S).  See
               H. H. Berry, G. Gabrielse, A. E. Livingston (1977),
               "Measurement of the Stokes parameters of Light",
               Applied Optics, 16:12, 3200 -- 3205.
   
               If the absolute intensity is not known, the value 1.
               is assumed for I, and all 4 Stokes parameters are
               dimensionless.  When the absolute intensity is known,
               all 4 Stokes parameters are in units of Watts per
               square meter.

   
;
    _item.name                  '_diffrn_scan_frame.polarizn_Stokes_Q'
    _item.category_id             diffrn_scan_frame
    _item.mandatory_code          no
     loop_
    _item_type.code               float
     save_

save__diffrn_scan_frame.polarizn_Stokes_Q_esd
    _item_description.description
;              The setimated standard deviation of
                   _diffrn_scan_frame.polarizn_Stokes_Q,
               (Ip-In)*cos(2*theta), where where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization, In is the intensity (amplitude squared) of
               the electric vector in the plane of the normal to the
               plane of polarization, and theta is the angle as viewed
               from the specimen, between the normal to the polarization
               plane and the laboratory Y axis as defined in the
               AXIS category
;
    _item.name                  '_diffrn_scan_frame.polarizn_Stokes_Q_esd'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .      0.0
                                  0.0    0.0
    _item_type.code               float
    loop_
    _item_related.related_name
    _item_related.function_code  '_diffrn_scan_frame.polarizn_Stokes_Q'
                                 'associated_value'
     save_

   
save__diffrn_scan_frame.polarizn_Stokes_U
    _item_description.description
;
               (Ip-In)*sin(2*theta), where where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization, In is the intensity (amplitude squared) of
               the electric vector in the plane of the normal to the
               plane of polarization, and theta is the angle as viewed
               from the specimen, between the normal to the polarization
               plane and the laboratory Y axis as defined in the
               AXIS category.
   
               This is an average or other representative sample of the
               frame.

               This is the third of the Stokes polarization parameters,
               I, Q, U, V (also known as I, M, C, S).  See
               H. H. Berry, G. Gabrielse, A. E. Livingston (1977),
               "Measurement of the Stokes parameters of Light",
               Applied Optics, 16:12, 3200 -- 3205.

               If the absolute intensity is not known, the value 1.
               is assumed for I, and all 4 Stokes parameters are
               dimensionless.  When the absolute intensity is known,
               all 4 Stokes parameters are in units of Watts per
               square meter.

   
;
    _item.name                  '_diffrn_scan_frame.polarizn_Stokes_U'
    _item.category_id             diffrn_scan_frame
    _item.mandatory_code          no
     loop_
    _item_type.code               float
     save_

save__diffrn_scan_frame.polarizn_Stokes_U_esd
    _item_description.description
;              The setimated standard deviation of
                   _diffrn_scan_frame.polarizn_Stokes_U,
               (Ip-In)*sin(2*theta), where where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization, In is the intensity (amplitude squared) of
               the electric vector in the plane of the normal to the
               plane of polarization, and theta is the angle as viewed
               from the specimen, between the normal to the polarization
               plane and the laboratory Y axis as defined in the
               AXIS category.
;
    _item.name                  '_diffrn_scan_frame.polarizn_Stokes_U_esd'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .      0.0
                                  0.0    0.0
    _item_type.code               float
    loop_
    _item_related.related_name
    _item_related.function_code  '_diffrn_scan_frame.polarizn_Stokes_U'
                                 'associated_value'
     save_


save__diffrn_scan_frame.polarizn_Stokes_V
    _item_description.description
;
               +/-2*sqrt(IpIn), with a + sign for right-handed circular
               polarization, where where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization and In is the intensity (amplitude squared) of
               the electric vector in the plane of the normal to the
               plane of polarization, and theta is the angle as viewed
               from the specimen, between the normal to the polarization
               plane and the laboratory Y axis as defined in the
               AXIS category.
   
               This is an average or other representative sample of the
               frame.

               This is the fourth of the Stokes polarization parameters,
               I, Q, U, V (also known as I, M, C, S).  See
               H. H. Berry, G. Gabrielse, A. E. Livingston (1977),
               "Measurement of the Stokes parameters of Light",
               Applied Optics, 16:12, 3200 -- 3205.

               If the absolute intensity is not known, the value 1.
               is assumed for I, and all 4 Stokes parameters are
               dimensionless.  When the absolute intensity is known,
               all 4 Stokes parameters are in units of Watts per
               square meter.

   
;
    _item.name                  '_diffrn_scan_frame.polarizn_Stokes_V'
    _item.category_id             diffrn_scan_frame
    _item.mandatory_code          no
     loop_
    _item_type.code               float
     save_

save__diffrn_scan_frame.polarizn_Stokes_V_esd
    _item_description.description
;              The setimated standard deviation of
                   _diffrn_scan_frame.polarizn_Stokes_V,
               +/-2*sqrt(IpIn), with a + sign for right-handed circular
               polarization, where where Ip is the intensity
               (amplitude squared) of the electric vector in the plane of
               polarization and In is the intensity (amplitude squared) of
               the electric vector in the plane of the normal to the
               plane of polarization, and theta is the angle as viewed
               from the specimen, between the normal to the polarization
               plane and the laboratory Y axis as defined in the
               AXIS category.

;
    _item.name                  '_diffrn_scan_frame.polarizn_Stokes_V_esd'
    _item.category_id             diffrn_radiation
    _item.mandatory_code          no
     loop_
    _item_range.maximum
    _item_range.minimum           .      0.0
                                  0.0    0.0
    _item_type.code               float
    loop_
    _item_related.related_name
    _item_related.function_code  '_diffrn_scan_frame.polarizn_Stokes_V'
                                 'associated_value'
     save_


save__diffrn_scan_frame.scan_id
    _item_description.description
;             The value of _diffrn_scan_frame.scan_id identifies the scan
              containing this frame.

              This item is a pointer to _diffrn_scan.id in the
              DIFFRN_SCAN category.
;
    _item.name             '_diffrn_scan_frame.scan_id'
    _item.category_id        diffrn_scan_frame
    _item.mandatory_code     yes
    _item_type.code          code
     save_
    
    
save__diffrn_scan_frame.time_period
    _item_description.description
;              The time in seconds between the start of this frame and the
               start of the next frame, if any.  If there is no next frame,
               a null value should be given.
;
    _item.name                 '_diffrn_scan_frame.time_period'
    _item.category_id          diffrn_scan_frame
    _item.mandatory_code       no
    _item_type.code            float
    _item_units.code           'seconds'
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0.0
     save_


save__diffrn_scan_frame.time_rstrt_incr
    _item_description.description
;              The time in seconds between the end of integration of this step of the scan
               and the start of integration of the next step.
             
               The sum of the values of _diffrn_scan_frame.integration_time
               and  _diffrn_scan_frame.time_rstrt_incr is the
               time from the start of integration of one frame and the start of
               integration for the next frame and should equal the value of
               _diffrn_scan_frame.time_period for this
               frame.   The value of _diffrn_scan.time_rstrt_incr will be
               representative of the ensemble of values of
               _diffrn_scan_frame_axis.time_rstrt_incr (e.g.
               the mean).
              
               If there is no next frame, a null value should be given.
;
    _item.name                 '_diffrn_scan_frame.time_rstrt_incr'
    _item.category_id          diffrn_scan_frame
    _item.mandatory_code       no
    _item_type.code            float
    _item_units.code           'seconds'
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0.0
     save_


save__diffrn_scan_frame.variant
    _item_description.description
;             The value of _diffrn_scan_frame.variant gives the variant
              to which the given DIFFRN_SCAN_FRAME row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
             
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_scan_frame.variant'
    _item.category_id             diffrn_scan_frame
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


##########################
# DIFFRN_SCAN_FRAME_AXIS #
##########################

save_diffrn_scan_frame_axis
    _category.description
;    Data items in the DIFFRN_SCAN_FRAME_AXIS category describe the
     settings of axes for particular frames.  Unspecified axes are
     assumed to be at their zero points.  If, for any given frame,
     nonzero values apply for any of the data items in this category,
     those values should be given explicitly in this category and not
     simply inferred from values in DIFFRN_SCAN_AXIS.
;
    _category.id                   diffrn_scan_frame_axis
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _diffrn_scan_frame_axis.axis_id AXISID
    _diffrn_scan_frame_axis.angle ANGLE
    _diffrn_scan_frame_axis.angle_increment ANGLEINCREMENT
    _diffrn_scan_frame_axis.angle_rstrt_incr ANGLERSTRTINCREMENT
    _diffrn_scan_frame_axis.displacement DISP
    _diffrn_scan_frame_axis.displacement_increment DISPINCREMENT
    _diffrn_scan_frame_axis.displacement_rstrt_incr DISPRSTRTINCREMENT
    _diffrn_scan_frame_axis.reference_angle REFANGLE
    _diffrn_scan_frame_axis.reference_displacement REFDISP

   
    { /entry:NXentry
      /CBF_scan_id="SCANID"
      /instrument:NXinstrument
       /DETECTORNAME:NXdetector_group
       /DETECTORELEMENTNAME:NXdetector
    for AXISEQUIPMENT=="detector"}
    {  /entry:NXentry
         /sample:NXsample
    for AXISEQUIPMENT=="goniometer"}
    {  /entry:NXentry
    for AXISEQUIPMENT=="general"}
         /transformations:NXtransformations
           /AXISID=[]
             @diffrn_scan_frame_axis__angle_start=[ANGSTART]
             @diffrn_scan_frame_axis__angle_range=[ANGRANGE]
             @diffrn_scan_frame_axis__angle_increment=[ANGINC]
             @diffrn_scan_frame_axis__angle_rstrt_incr=[ANGRSTRT]
             @diffrn_scan_frame_axis__displacement_start=[DISPSTART]
             @diffrn_scan_frame_axis__displacement_range=[DISPRANGE]
             @diffrn_scan_frame_axis__displacement_increment=[DISPINC]
             @diffrn_scan_frame_axis__displacement_rstrt_incr=[DISPRSTRT]
             @diffrn_scan_frame_axis__reference_angle=[ANG]
             @diffrn_scan_frame_axis__reference_displacement=[DISP]


    note that @units="mm" or @units="deg" should also be specified.
   
    The dimensions of the array depend on np (the number of frames = the
    value of _diffrn_scan.frames)
   
    either DISP OR ANGLE is inserted as the i-th element
    counting from 1 in AXISID where i is the value of
    _diffrn_scan_frame.frame_number for which the value
    of _diffrn_scan_frame.frame_id agrees with the
    value of _diffrn_scan_frame_axis.frame_id
   
    The remaining tags similarly populate the attribute arrays
   
   
   
   
;
     loop_
    _category_key.name
                                  '_diffrn_scan_frame_axis.frame_id'
                                  '_diffrn_scan_frame_axis.axis_id'
                                  '_diffrn_scan_frame_axis.variant'
     loop_
    _category_group.id           'inclusive_group'
                                 'diffrn_group'
     save_


save__diffrn_scan_frame_axis.axis_id
    _item_description.description
;              The value of this data item is the identifier of one of
               the axes for the frame for which settings are being specified.

               Multiple axes may be specified for the same value of
               _diffrn_scan_frame.frame_id.

               This item is a pointer to _axis.id in the
               AXIS category.
;
    _item.name                 '_diffrn_scan_frame_axis.axis_id'
    _item.category_id          diffrn_scan_frame_axis
    _item.mandatory_code       yes
    _item_type.code            code
     save_


save__diffrn_scan_frame_axis.angle
    _item_description.description
;              The setting of the specified axis in degrees for this frame.
               This is the setting at the start of the integration time.
;
    _item.name                 '_diffrn_scan_frame_axis.angle'
    _item.category_id          diffrn_scan_frame_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'degrees'
     save_


save__diffrn_scan_frame_axis.angle_increment
    _item_description.description
;              The increment for this frame for the angular setting of
               the specified axis in degrees.  The sum of the values
               of _diffrn_scan_frame_axis.angle and
               _diffrn_scan_frame_axis.angle_increment is the
               angular setting of the axis at the end of the integration
               time for this frame.
;
    _item.name                 '_diffrn_scan_frame_axis.angle_increment'
    _item.category_id          diffrn_scan_frame_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'degrees'
     save_


save__diffrn_scan_frame_axis.angle_rstrt_incr
    _item_description.description
;              The increment after this frame for the angular setting of
               the specified axis in degrees.  The sum of the values
               of _diffrn_scan_frame_axis.angle,
               _diffrn_scan_frame_axis.angle_increment and
               _diffrn_scan_frame_axis.angle_rstrt_incr is the
               angular setting of the axis at the start of the integration
               time for the next frame and should equal
               _diffrn_scan_frame_axis.angle for this next frame.
;
    _item.name               '_diffrn_scan_frame_axis.angle_rstrt_incr'
    _item.category_id          diffrn_scan_frame_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'degrees'
     save_


save__diffrn_scan_frame_axis.displacement
    _item_description.description
;              The setting of the specified axis in millimetres for this
               frame.  This is the setting at the start of the integration
               time.
;
    _item.name               '_diffrn_scan_frame_axis.displacement'
    _item.category_id          diffrn_scan_frame_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'millimetres'
     save_


save__diffrn_scan_frame_axis.displacement_increment
    _item_description.description
;              The increment for this frame for the displacement setting of
               the specified axis in millimetres.  The sum of the values
               of _diffrn_scan_frame_axis.displacement and
               _diffrn_scan_frame_axis.displacement_increment is the
               angular setting of the axis at the end of the integration
               time for this frame.
;
    _item.name               '_diffrn_scan_frame_axis.displacement_increment'
    _item.category_id          diffrn_scan_frame_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'millimetres'
     save_


save__diffrn_scan_frame_axis.displacement_rstrt_incr
    _item_description.description
;              The increment for this frame for the displacement setting of
               the specified axis in millimetres.  The sum of the values
               of _diffrn_scan_frame_axis.displacement,
               _diffrn_scan_frame_axis.displacement_increment and
               _diffrn_scan_frame_axis.displacement_rstrt_incr is the
               angular setting of the axis at the start of the integration
               time for the next frame and should equal
               _diffrn_scan_frame_axis.displacement for this next frame.
;
    _item.name               '_diffrn_scan_frame_axis.displacement_rstrt_incr'
    _item.category_id          diffrn_scan_frame_axis
    _item.mandatory_code       no
    _item_default.value        0.0
    _item_type.code            float
    _item_units.code           'millimetres'
     save_

save__diffrn_scan_frame_axis.frame_id
    _item_description.description
;              The value of this data item is the identifier of the
               frame for which axis settings are being specified.

               Multiple axes may be specified for the same value of
               _diffrn_scan_frame.frame_id.

               This item is a pointer to _diffrn_data_frame.id in the
               DIFFRN_DATA_FRAME category.
;
    _item.name               '_diffrn_scan_frame_axis.frame_id'
    _item.category_id          diffrn_scan_frame_axis
    _item.mandatory_code       yes
    _item_type.code            code
     save_

save__diffrn_scan_frame_axis.reference_angle
     _item_description.description
;              The setting of the specified axis in degrees
               against which measurements of the reference beam center
               and reference detector distance should be made.

               This is normally the same for all frames, but the
               option is provided here of making changes when
               needed.

               If not provided, it is assumed to be zero.
;
     _item.name               '_diffrn_scan_frame_axis.reference_angle'
     _item.category_id          diffrn_scan_frame_axis
     _item.mandatory_code       implicit
     _item_default.value        0.0
     _item_type.code            float
     _item_units.code           'degrees'
      save_


save__diffrn_scan_frame_axis.reference_displacement
     _item_description.description
;              The setting of the specified axis in millimetres for this
               frame against which measurements of the reference beam center
               and reference detector distance should be made.

               This is normally the same for all frames, but the
               option is provided here of making changes when
               needed.

               If not provided, it is assumed to be equal to
               _diffrn_scan_frame_axis.displacement.
;
     _item.name               '_diffrn_scan_frame_axis.reference_displacement'
     _item.category_id          diffrn_scan_frame_axis
     _item.mandatory_code       implicit
     _item_type.code            float
     _item_units.code           'millimetres'
      save_

save__diffrn_scan_frame_axis.variant
    _item_description.description
;             The value of _diffrn_scan_frame_axis.variant gives the variant
              to which the given DIFFRN_SCAN_FRAME_AXIS row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.

              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_scan_frame_axis.variant'
    _item.category_id             diffrn_scan_frame_axis
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


#############################
# DIFFRN_SCAN_FRAME_MONITOR #
#############################


save_diffrn_scan_frame_monitor
    _category.description
;             Data items in the DIFFRN_SCAN_FRAME_MONITOR category record
              the values and details about each monitor for each frame of data
              during a scan.
             
              Each monitor value is uniquely identified by the combination of
              the scan_id given by _diffrn_scan_frame.scan_id
              the frame_id given by _diffrn_scan_frame_monitor.frame_id,
              the monitor's detector_id given by
              _diffrn_scan_frame_monitor.detector_id,
              and a 1-based ordinal given by _diffrn_scan_frame_monitor.id.
             
              If there is only one frame for the scan, the value of
              _diffrn_scan_frame_monitor.frame_id may be
              omitted.
                           
              A single frame may have more than one monitor value, and each
              monitor value may be the result of integration over the entire
              frame integration time given by the value of
              _diffrn_scan_frame.integration_time
              or many monitor values may be reported over shorter times given
              by the value of _diffrn_scan_frame_monitor.integration_time.  If
              only one monitor value for a given monitor is collected during
              the integration time of the frame, the value of
              _diffrn_scan_frame_monitor.id may be
              omitted.

;
    _category.id                   diffrn_scan_frame_monitor
    _category.mandatory_code       no
    _category.NX_mapping_details
;
   
    _diffrn_scan_frame_monitor.id MONID -->
    _diffrn_scan_frame_monitor.detector_id DETECTORNAME -->
    _diffrn_scan_frame_monitor.scan_id SCANID -->
    _diffrn_scan_frame_monitor.frame_id FRAMEID -->
    _diffrn_scan_frame_monitor.integration_time INTEGRATIONTIME -->
    _diffrn_scan_frame_monitor.monitor_value MONITORVALUE -->
   
    -->
   
    /entry:NXentry
      /CBF_scan_id="SCANID"
        /instrument:NXinstrument
          /CBF_diffrn_scan_frame_monitor__DETECTORNAME_MONID:NXmonitor
            @CBF_detector_id="DETECTORNAME"
            @CBF_diffrn_scan_frame_monitor__id="MONID"
            /data=[MONITORVALUE] 
            /count_time=[INTEGRATIONTIME]
           

;
     loop_
    _category_key.name             '_diffrn_scan_frame_monitor.id'
                                   '_diffrn_scan_frame_monitor.detector_id'
                                   '_diffrn_scan_frame_monitor.scan_id'
                                   '_diffrn_scan_frame_monitor.frame_id'
                                   '_diffrn_scan_frame_monitor.variant'
     loop_
    _category_group.id             'inclusive_group'
                                   'diffrn_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;   Example 1 - The beam intensity for frame FRAME1 is being tracked
    by a beamstop monitor detector BSM01, made from metal foil and
    a PIN diode, locate 20 mm in front of a MAR345 detector and being
    sampled every 2 seconds in a 20 second scan.

;
;
       
     # category DIFFRN_DETECTOR
     loop_
     _diffrn_detector.diffrn_id
     _diffrn_detector.id
     _diffrn_detector.type
     _diffrn_detector.number_of_axes
      P6MB MAR345-SN26 'MAR 345' 4
      P6MB BSM01 'metal foil and PIN diode' 1

     # category DIFFRN_DETECTOR_AXIS
     loop_
     _diffrn_detector_axis.detector_id
     _diffrn_detector_axis.axis_id
      MAR345-SN26 DETECTOR_X
      MAR345-SN26 DETECTOR_Y
      MAR345-SN26 DETECTOR_Z
      MAR345-SN26 DETECTOR_PITCH
      BSM01 MONITOR_Z


     # category DIFFRN_DATA_FRAME
     loop_
     _diffrn_data_frame.id
     _diffrn_data_frame.detector_element_id
     _diffrn_data_frame.array_id
     _diffrn_data_frame.binary_id
      FRAME1 ELEMENT1 ARRAY1 1


     # category DIFFRN_SCAN
     loop_
     _diffrn_scan.id
     _diffrn_scan.frame_id_start
     _diffrn_scan.frame_id_end
     _diffrn_scan.frames
      SCAN1 FRAME1 FRAME1 1

     # category DIFFRN_SCAN_AXIS
     loop_
     _diffrn_scan_axis.scan_id
     _diffrn_scan_axis.axis_id
     _diffrn_scan_axis.angle_start
     _diffrn_scan_axis.angle_range
     _diffrn_scan_axis.angle_increment
     _diffrn_scan_axis.displacement_start
     _diffrn_scan_axis.displacement_range
     _diffrn_scan_axis.displacement_increment
      SCAN1 GONIOMETER_OMEGA 12.0 1.0 1.0 0.0 0.0 0.0
      SCAN1 GONIOMETER_KAPPA 23.3 0.0 0.0 0.0 0.0 0.0
      SCAN1 GONIOMETER_PHI -165.8 0.0 0.0 0.0 0.0 0.0
      SCAN1 DETECTOR_Z 0.0 0.0 0.0 -240.0 0.0 0.0
      SCAN1 DETECTOR_Y 0.0 0.0 0.0 0.6 0.0 0.0
      SCAN1 DETECTOR_X 0.0 0.0 0.0 -0.5 0.0 0.0
      SCAN1 DETECTOR_PITCH 0.0 0.0 0.0 0.0 0.0 0.0
      SCAN1 MONITOR_Z 0.0 0.0 0.0 -220.0 0.0 0.0

     # category DIFFRN_SCAN_FRAME
     loop_
     _diffrn_scan_frame.frame_id
     _diffrn_scan_frame.frame_number
     _diffrn_scan_frame.integration_time
     _diffrn_scan_frame.scan_id
     _diffrn_scan_frame.date
      FRAME1 1 20.0 SCAN1 1997-12-04T10:23:48
     
     # category DIFFRN_SCAN_FRAME_MONITOR
     loop_
     _diffrn_scan_frame_monitor.id
     _diffrn_scan_frame_monitor.detector_id
     _diffrn_scan_frame_monitor.scan_id
     _diffrn_scan_frame_monitor.frame_id
     _diffrn_scan_frame_monitor.integration_time
     _diffrn_scan_frame_monitor.monitor_value
      1  BSM01 SCAN1 FRAME1 2.0 23838345642
      2  BSM01 SCAN1 FRAME1 2.0 23843170669
      3  BSM01 SCAN1 FRAME1 2.0 23839478690
      4  BSM01 SCAN1 FRAME1 2.0 23856642085
      5  BSM01 SCAN1 FRAME1 2.0 23781717656
      6  BSM01 SCAN1 FRAME1 2.0 23788850775
      7  BSM01 SCAN1 FRAME1 2.0 23815576677
      8  BSM01 SCAN1 FRAME1 2.0 23789299964
      9  BSM01 SCAN1 FRAME1 2.0 23830195536
      10 BSM01 SCAN1 FRAME1 2.0 23673082270

     # category DIFFRN_SCAN_FRAME_AXIS
     loop_
     _diffrn_scan_frame_axis.frame_id
     _diffrn_scan_frame_axis.axis_id
     _diffrn_scan_frame_axis.angle
     _diffrn_scan_frame_axis.displacement
      FRAME1 GONIOMETER_OMEGA 12.0 0.0
      FRAME1 GONIOMETER_KAPPA 23.3 0.0
      FRAME1 GONIOMETER_PHI -165.8 0.0
      FRAME1 DETECTOR_Z 0.0 -240.0
      FRAME1 DETECTOR_Y 0.0 0.6
      FRAME1 DETECTOR_X 0.0 -0.5
      FRAME1 DETECTOR_PITCH 0.0 0.0
      FRAME1 MONITOR_Z 0.0 -220.0

     # category AXIS
     loop_
     _axis.id
     _axis.type
     _axis.equipment
     _axis.depends_on
     _axis.vector[1] _axis.vector[2] _axis.vector[3]
     _axis.offset[1] _axis.offset[2] _axis.offset[3]
      GONIOMETER_OMEGA rotation goniometer . 1 0 0 . . .
      GONIOMETER_KAPPA rotation goniometer GONIOMETER_OMEGA 0.64279
      0 0.76604 . . .
      GONIOMETER_PHI   rotation goniometer GONIOMETER_KAPPA 1 0 0
     . . .
      SOURCE           general source . 0 0 1 . . .
      GRAVITY          general gravity . 0 -1 0 . . .
      DETECTOR_Z       translation detector . 0 0 1 0 0 0
      DETECTOR_Y       translation detector DETECTOR_Z 0 1 0 0 0 0
      DETECTOR_X       translation detector DETECTOR_Y 1 0 0 0 0 0
      DETECTOR_PITCH   rotation    detector DETECTOR_X 0 1 0 0 0 0
      ELEMENT_X        translation detector DETECTOR_PITCH
     1 0 0 172.43 -172.43 0
      ELEMENT_Y        translation detector ELEMENT_X
     0 1 0 0 0 0
      MONITOR_Z        translation detector . 0 0 1 0 0 0

;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     save_


save__diffrn_scan_frame_monitor.id
    _item_description.description
;             This item is an integer identifier which, along with
              _diffrn_scan_frame_monitor.detector_id,
              _diffrn_scan_frame_monitor.scan_id, and
              _diffrn_scan_frame_monitor.frame_id
              should uniquely identify the monitor value being recorded

              If _array_data.binary_id is not explicitly given,
              it defaults to 1.
;
    _item.name             '_diffrn_scan_frame_monitor.id'
    _item.category_id      diffrn_scan_frame_monitor
    _item.mandatory_code   implicit
    _item_default.value           1
    _item_type.code               int
     loop_
    _item_range.maximum
    _item_range.minimum
                            1  1
                            .  1
     save_

save__diffrn_scan_frame_monitor.detector_id
    _item_description.description
;              This data item is a pointer to _diffrn_detector.id in
               the DIFFRN_DETECTOR category.

;
    _item.name                  '_diffrn_scan_frame_monitor.detector_id'
    _item.category_id             diffrn_scan_frame_monitor
    _item.mandatory_code          yes
    _item_type.code               code
     save_

save__diffrn_scan_frame_monitor.frame_id
    _item_description.description
;              This item is a pointer to _diffrn_data_frame.id
               in the DIFFRN_DATA_FRAME category.
;
    _item.name                  '_diffrn_scan_frame_monitor.frame_id'
    _item.category_id             diffrn_scan_frame_monitor
    _item.mandatory_code          implicit
    _item_type.code               code
     save_

save__diffrn_scan_frame_monitor.scan_id
    _item_description.description
;              This item is a pointer to _diffrn_scan.id in
                   the DIFFRN_SCAN category.
;
    _item.name                  '_diffrn_scan_frame_monitor.scan_id'
    _item.category_id             diffrn_scan_frame_monitor
    _item.mandatory_code          yes
    _item_type.code               code
     save_

   
save__diffrn_scan_frame_monitor.integration_time
    _item_description.description
;              The precise time for integration of the monitor value given in
               _diffrn_scan_frame_monitor.value
               must be given in _diffrn_scan_frame_monitor.integration_time.
;
    _item.name                 '_diffrn_scan_frame_monitor.integration_time'
    _item.category_id          diffrn_scan_frame_monitor
    _item.mandatory_code       no
    _item_type.code            float
    _item_units.code           'seconds'
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0.0
     save_

save__diffrn_scan_frame_monitor.value
    _item_description.description
;              The value reported by the monitor detector should be given in
               _diffrn_scan_frame_monitor.value.
              
               The value is typed as float to allow of monitors for very intense beams
               that cannot report all digits, but when available, all digits of the
               monitor should be recorded.
;
    _item.name                 '_diffrn_scan_frame_monitor.value'
    _item.category_id          diffrn_scan_frame_monitor
    _item.mandatory_code       no
    _item_type.code            float
     loop_
    _item_range.maximum
    _item_range.minimum
                            .   0.0
     save_

save__diffrn_scan_frame_monitor.variant
    _item_description.description
;             The value of _diffrn_scan_frame_monitor.variant gives the variant
              to which the given DIFFRN_SCAN_FRAME_MONITOR row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.
           
              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_diffrn_scan_frame_monitor.variant'
    _item.category_id             diffrn_scan_frame_monitor
    _item.mandatory_code          implicit
    _item_type.code               code
     save_



#######
# MAP #
#######

save_map
    _category.description
;             Data items in the MAP category record
              the details of a maps. Maps record values of parameters,
              such as density, that are functions of position within
              a cell or are functions of orthogonal coordinates in
              three space.
             
              A map may is composed of one or more map segments
              specified in the MAP_SEGMENT category.
                           
              Examples are given in the MAP_SEGMENT category.
;
    _category.id                   map
    _category.mandatory_code       no
     loop_
    _category_key.name             '_map.id'
                                   '_map.diffrn_id'
                                   '_map.entry_id'
                                   '_map.variant'
     loop_
    _category_group.id             'inclusive_group'
                                   'array_data_group'
                                   'map_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;   Example 1 - Identifying an observed density map
                and a calculated density map
;
;
       
        loop_
        _map.id
        _map.details
       
        rho_calc
   ;
        density calculated from F_calc derived from the ATOM_SITE list
   ;
        rho_obs
   ;
        density combining the observed structure factors with the
        calculated phases
   ;
;

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

     save_


save__map.details
     _item_description.description
;              The value of _map.details should give a
               description of special aspects of each map.

;
    _item.name                  '_map.details'
    _item.category_id             map
    _item.mandatory_code          no
    _item_type.code               text
     loop_
    _item_examples.case
    _item_examples.detail
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;   Example 1 - Identifying an observed density map
                and a calculated density map
;
;
       
        loop_
        _map.id
        _map.details
       
        rho_calc
    ;
        density calculated from F_calc derived from the ATOM_SITE list
    ;
        rho_obs
    ;
        density combining the observed structure factors with the
        calculated phases
    ;
;

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      save_
     
save__map.diffrn_id
    _item_description.description
;             This item is a pointer to _diffrn.id in the
              DIFFRN category.
;
    _item.name                  '_map.diffrn_id'
    _item.category_id             map
    _item.mandatory_code          implicit
    _item_type.code               code
     save_

save__map.entry_id
    _item_description.description
;             This item is a pointer to _entry.id in the
              ENTRY category.
;
    _item.name                  '_map.entry_id'
    _item.category_id             map
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


save__map.id
    _item_description.description
;             The value of _map.id must uniquely identify
              each map for the given diffrn.id or entry.id.
;
     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
           '_map.id'                map          yes
           '_map_segment.id'        map_segment  yes
    _item_type.code               code
     loop_
    _item_linked.child_name
    _item_linked.parent_name
           '_map_segment.id'        '_map.id'
     save_

save__map.variant
    _item_description.description
;             The value of _map.variant gives the variant
              to which the given map row is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.

              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_map.variant'
    _item.category_id             map
    _item.mandatory_code          implicit
    _item_type.code               code
     save_



###############
# MAP_SEGMENT #
###############


save_map_segment
    _category.description
;             Data items in the MAP_SEGMENT category record
              the details about each segment (section or brick) of a map.
;
    _category.id                   map_segment
    _category.mandatory_code       no
     loop_
    _category_key.name             '_map_segment.id'
                                   '_map_segment.map_id'
                                   '_map_segment.variant'
     loop_
    _category_group.id             'inclusive_group'
                                   'array_data_group'
                                   'map_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;   Example 1 - Identifying an observed density map
                and a calculated density map, each consisting of one
                segment, both using the same array structure
                and mask.
;
;
       
        loop_
        _map.id
        _map.details
       
        rho_calc
     ;
        density calculated from F_calc derived from the ATOM_SITE list
     ;
        rho_obs
     ;
        density combining the observed structure factors with the
        calculated phases
     ;

        loop_
        _map_segment.map_id
        _map_segment.id
        _map_segment.array_id
        _map_segment.binary_id
        _map_segment.mask_array_id
        _map_segment.mask_binary_id
        rho_calc rho_calc map_structure 1 mask_structure 1
        rho_obs  rho_obs  map_structure 2 mask_structure 1
;

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

     save_


save__map_segment.array_id
    _item_description.description
;             The value of _map_segment.array_id identifies the array
              structure into which the map is organized.

              This item is a pointer to _array_structure.id in the
              ARRAY_STRUCTURE category.
;
    _item.name                  '_map_segment.array_id'
    _item.category_id             map_segment
    _item.mandatory_code          implicit
    _item_type.code               code
     save_

save__map_segment.array_section_id
    _item_description.description
;             This item is a pointer to _array_structure_list_section.id
    in the "ARRAY_STRUCTURE_LIST_SECTION category.
;
    _item.name                  '_map_segment.array_section_id'
    _item.category_id             map_segment
    _item.mandatory_code          yes
    _item_type.code               code
     save_


save__map_segment.binary_id
    _item_description.description
;             The value of _map_segment.binary_id distinguishes the particular
              set of data organized according to _map_segment.array_id in
              which the data values of the map are stored.

              This item is a pointer to _array_data.binary_id in the
              ARRAY_DATA category.
;
    _item.name                  '_map_segment.binary_id'
    _item.category_id             map_segment
    _item.mandatory_code          implicit
    _item_type.code               int
     save_

save__map_segment.mask_array_id
    _item_description.description
;             The value of _map_segment.mask_array_id, if given, the array
              structure into which the mask for the map is organized.  If no
              value is given, then all elements of the map are valid.  If a
              value is given, then only elements of the map for which the
              corresponding element of the mask is non-zero are valid.  The
              value of _map_segment.mask_array_id differs from the value of
              _map_segment.array_id in order to permit the mask to be given
              as, say, unsigned 8-bit integers, while the map is given as
              a data type with more range.  However, the two array structures
              must be aligned, using the same axes in the same order with the
              same displacements and increments

              This item is a pointer to _array_structure.id in the
              ARRAY_STRUCTURE category.
;
    _item.name                  '_map_segment.mask_array_id'
    _item.category_id             map_segment
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


save__map_segment.mask_binary_id
    _item_description.description
;             The value of _map_segment.mask_binary_id identifies the
              particular set of data organized according to
              _map_segment.mask_array_id specifying the mask for the map.

              This item is a pointer to _array_data.binary_id in the
              ARRAY_DATA category.
;
    _item.name                  '_map_segment.mask_binary_id'
    _item.category_id             map_segment
    _item.mandatory_code          implicit
    _item_type.code               int
     save_

save__map_segment.mask_array_section_id
    _item_description.description
;             This item is a pointer to _array_structure_list_section.id
    in the "ARRAY_STRUCTURE_LIST_SECTION category.
;
    _item.name                  '_map_segment.mask_array_section_id'
    _item.category_id             map_segment
    _item.mandatory_code          yes
    _item_type.code               code
    save_

   
save__map_segment.id
    _item_description.description
;             The value of _map_segment.id must uniquely
              identify each segment of a map.
;
     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
           '_map_segment.id'
           map_segment
           yes
    _item_type.code               code

     save_


save__map_segment.map_id
    _item_description.description
;              This item is a pointer to _map.id
               in the MAP category.
;
    _item.name                  '_map_segment.map_id'
    _item.category_id             map_segment
    _item.mandatory_code          yes
    _item_type.code               code
     save_

save__map_segment.details
     _item_description.description
;              The value of _map_segment.details should give a
               description of special aspects of each segment of a map.

;
    _item.name                  '_map_segment.details'
    _item.category_id             map_segment
    _item.mandatory_code          no
    _item_type.code               text
     loop_
    _item_examples.case
    _item_examples.detail
;               Example to be provided
;
;              

;
      save_

save__map_segment.variant
    _item_description.description
;             The value of _map_segment.variant gives the variant
              to which the given map segment is related.
             
              If this value is not given, the variant is assumed to be the default
              null variant.

              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_map_segment.variant'
    _item.category_id             map_segment
    _item.mandatory_code          implicit
    _item_type.code               code
     save_


###########
# VARIANT #
###########


save_variant
    _category.description
;             Data items in the VARIANT category record
              the details about sets of variants of data items.
             
              There is sometimes a need to allow for multiple versions of the
              same data items in order to allow for refinements and corrections
              to earlier assumptions, observations and calculations.  In order
              to allow data sets to contain more than one variant of the same
              information, an optional ...variant data item as a pointer to
              _variant.variant has been added to the key of every category,
              as an implicit data item with a null (empty) default value.
             
              All rows in a category with the same variant value are considered
              to be related to one another and to all rows in other categories
              with the same variant value.  For a given variant, all such rows
              are also considered to be related to all rows with a null variant
              value, except that a row with a null variant value for which all
              other components of its key are identical to those entries in
              another row with a non-null variant value is not related the
              the rows with that non-null variant value.  This behavior is
              similar to the convention for identifying alternate conformers
              in an atom list.
             
              An optional role may be specified for a variant as the value of
              _variant.role.  Possible roles are null, "preferred",
              "raw data", "unsuccessful trial".
             
              variants may carry an optional timestamp as the value of
              _variant.timestamp.
             
              variants may be related to other variants from which they were
              derived by the value of _variant.variant_of
             
              Further details about the variant may be specified as the value
              of _variant.details.
             
              In order to allow variant information from multiple datasets to
              be combined, _variant.diffrn_id and/or _variant.entry_id may
              be used.
             
;
    _category.id                   variant
    _category.mandatory_code       no
     loop_
    _category_key.name             '_variant.variant'
                                   '_variant.diffrn_id'
                                   '_variant.entry_id'
     loop_
    _category_group.id             'inclusive_group'
                                   'variant_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;   Example 1 - Distinguishing between a raw beam center and a refined beam
       center inferred after indexing.  Detector d1 is composed of
       four CCD detector elements, each 200 mm by 200 mm, arranged
       in a square, in the pattern

                   1     2
                      *
                   3     4

       Note that the beam centre is slightly displaced from each of the
       detector elements, just beyond the lower right corner of 1,
       the lower left corner of 2, the upper right corner of 3 and
       the upper left corner of 4.  For each element, the detector
       face coordiate system, is assumed to have the fast axis
       running from left to right and the slow axis running from
       top to bottom with the origin at the top left corner.
      
       After indexing and refinement, the center is shifted by .2 mm
       left and .1 mm down.
       
       
;
;

        loop_
        _variant.variant
        _variant.role
        _variant.timestamp
        _variant.variant_of
        _variant.details
            . "raw data" 2007-08-03T23:20:00 . .
            indexed "preferred" 2007-08-04T01:17:28 .
              "indexed cell and refined beam center"
             
        loop_
        _diffrn_detector_element.detector_id
        _diffrn_detector_element.id
        _diffrn_detector_element.reference_center_fast
        _diffrn_detector_element.reference_center_slow
        _diffrn_detector_element.reference_center_units
        _diffrn_detector_element.variant
        d1     d1_ccd_1  201.5 201.5  mm  .
        d1     d1_ccd_2  -1.8  201.5  mm  .
        d1     d1_ccd_3  201.6  -1.4  mm  .
        d1     d1_ccd_4  -1.7   -1.5  mm  .
        d1     d1_ccd_1  201.3 201.6  mm  indexed
        d1     d1_ccd_2  -2.0  201.6  mm  indexed
        d1     d1_ccd_3  201.3  -1.5  mm  indexed
        d1     d1_ccd_4  -1.9   -1.6  mm  indexed
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

     save_

save__variant.details
    _item_description.description
;              A description of special aspects of the variant.
;
    _item.name                  '_variant.details'
    _item.category_id             variant
    _item.mandatory_code          no
    _item_type.code               text
    _item_examples.case
;                                indexed cell and refined beam center
;
     save_

save__variant.diffrn_id
    _item_description.description
;             This item is a pointer to _diffrn.id in the
                  diffrn category.
;
    _item.name                  '_variant.diffrn_id'
    _item.category_id             variant
    _item.mandatory_code          implicit
    _item_type.code               code
     save_
   
save__variant.entry_id
    _item_description.description
;             This item is a pointer to _entry.id in the
                  entry category
;
    _item.name                  '_variant.entry_id'
    _item.category_id             variant
    _item.mandatory_code          yes
    _item_type.code               code
     save_

   
save__variant.role
    _item_description.description
;             The value of _variant.role  specified a role
              for this variant.  Possible roles are null, "preferred",
              "raw data", and "unsuccessful trial".
   
              A null value for _variant.role leaves the
              precise role of the variant unspecified.  No inference should
              be made that the variant with the latest time stamp is
              preferred.
;
    _item.name                  '_variant.role'
    _item.category_id            variant
    _item.mandatory_code         no
    _item_type.code              uline
     loop_
    _item_enumeration.value
    _item_enumeration.detail
     "preferred"
;    A value of "preferred" indicates that rows of any categories specifying
     this variant should be used in preference to rows with the same key
     specifying other variants or the null variant.  It is an error to specify
     two variants that appear in the same category with the same key as being
     preferred, but it is not an error to specify more than one variant as
     preferred in other cases.
;
     "raw data"
;    A value of "raw data" indicates data prior to any corrections,
     calculations or refinements.  It is not necessarily an error for raw data
     to also be a variant of an earlier variant.  It may be replacement raw
     data for earlier data believed to be erroneous.
;
     "unsuccessful trial"
;    A value of "unsuccessful trial" indicates data that should not be used
     for further calculation.
;
     save_


save__variant.timestamp
    _item_description.description
;              The date and time identifying a variant.  This is not
               necessarily the precise time of the measurement or calculation
               of the individual related data items, but a timestamp that
               reflects the order in which the variants were defined.
;
    _item.name                 '_variant.timestamp'
    _item.category_id          variant
    _item.mandatory_code       no
    _item_type.code            yyyy-mm-dd
     save_

   
save__variant.variant
    _item_description.description
;             The value of _variant.variant must uniquely identify
              each variant for the given diffraction experiment and/or entry
                   
              This item has been made implicit and given a default value of
              null.
;

     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
             '_variant.variant'                    variant             implicit
             '_variant.variant_of'                 variant             implicit
             '_array_data.variant'                 array_data          implicit
             '_array_element_size.variant'         array_element_size  implicit
             '_array_intensities.variant'          array_intensities   implicit
             '_array_structure.variant'            array_structure     implicit
             '_array_structure_list.variant'       array_structure_list
                                                                       implicit
             '_array_structure_list_axis.variant'  array_structure_list_axis
                                                                       implicit
             '_array_structure_list_section.variant'  array_structure_list_axis_section
                                                                       implicit
             '_axis.variant'                       axis                implicit
             '_diffrn_data_frame.variant'          diffrn_data_frame   implicit
             '_diffrn_detector.variant'            diffrn_detector     implicit
             '_diffrn_detector_axis.variant'       diffrn_detector_axis
                                                                       implicit
             '_diffrn_detector_element.variant'    diffrn_detector_element
                                                                       implicit
             '_diffrn_measurement.variant'         diffrn_measurement  implicit
             '_diffrn_measurement_axis.variant'    diffrn_measurement_axis
                                                                       implicit
             '_diffrn_radiation.variant'           diffrn_radiation    implicit
             '_diffrn_refln.variant'               diffrn_refln        implicit
             '_diffrn_scan.variant'                diffrn_scan         implicit
             '_diffrn_scan_axis.variant'           diffrn_scan_axis    implicit
             '_diffrn_scan_collection.variant'     diffrn_scan_collection
                                                                       implicit
             '_diffrn_scan_frame.variant'          diffrn_scan_frame   implicit
             '_diffrn_scan_frame_axis.variant'     diffrn_scan_frame_axis
                                                                       implicit
             '_diffrn_scan_frame_monitor.variant'  diffrn_scan_frame_monitor
                                                                       implicit
             '_map.variant'                        map                 implicit
             '_map_segment.variant'                map_segment         implicit


    _item_default.value           .
    _item_type.code               code
     loop_
    _item_linked.child_name
    _item_linked.parent_name
             '_array_data.variant'                 '_variant.variant'
             '_array_element_size.variant'         '_variant.variant'
             '_array_intensities.variant'          '_variant.variant'
             '_array_structure.variant'            '_variant.variant'
             '_array_structure_list.variant'       '_variant.variant'
             '_array_structure_list_axis.variant'  '_variant.variant'
             '_axis.variant'                       '_variant.variant'
             '_diffrn_data_frame.variant'          '_variant.variant'
             '_diffrn_detector.variant'            '_variant.variant'
             '_diffrn_detector_axis.variant'       '_variant.variant'
             '_diffrn_detector_element.variant'    '_variant.variant'
             '_diffrn_measurement.variant'         '_variant.variant'
             '_diffrn_measurement_axis.variant'    '_variant.variant'
             '_diffrn_radiation.variant'           '_variant.variant'
             '_diffrn_refln.variant'               '_variant.variant'
             '_diffrn_scan.variant'                '_variant.variant'
             '_diffrn_scan_axis.variant'           '_variant.variant'
             '_diffrn_scan_collection.variant'     '_variant.variant'
             '_diffrn_scan_frame.variant'          '_variant.variant'
             '_diffrn_scan_frame_axis.variant'     '_variant.variant'
             '_diffrn_scan_frame_monitor.variant'  '_variant.variant'
             '_map.variant'                        '_variant.variant'
             '_map_segment.variant'                '_variant.variant'

     save_


save__variant.variant_of
    _item_description.description
;             The value of _variant.variant_of gives the variant
              from which this variant was derived.  If this value is not given,
              the variant is assumed to be derived from the default null
              variant.

              This item is a pointer to _variant.variant in the
              VARIANT category.
;
    _item.name                  '_variant.variant_of'
    _item.category_id             variant
    _item.mandatory_code          implicit
    _item_type.code               code
     save_




########################   DEPRECATED DATA ITEMS ########################

save__diffrn_detector_axis.id
    _item_description.description
;              This data item is a pointer to _diffrn_detector.id in
               the DIFFRN_DETECTOR category.

               DEPRECATED -- DO NOT USE
;
    _item.name                  '_diffrn_detector_axis.id'
    _item.category_id             diffrn_detector_axis
    _item.mandatory_code          no
    _item_type.code               code
     save_

save__diffrn_detector_element.center[1]
    _item_description.description
;             The value of _diffrn_detector_element.center[1] is the X
              component of the distortion-corrected beam centre in
              millimetres from the (0, 0) (lower-left) corner of the
              detector element viewed from the sample side.

              The X and Y axes are the laboratory coordinate system
              coordinates defined in the AXIS category measured
              when all positioning axes for the detector are at their zero
              settings.  If the resulting X or Y axis is then orthogonal to the
              detector, the Z axis is used instead of the orthogonal axis.
             
              Because of ambiguity about the setting used to determine this
              center, use of this data item is deprecated.  The data item
              _diffrn_data_frame.center_fast
              which is referenced to the detector coordinate system and not
              directly to the laboratory coordinate system should be used
              instead.

;
    _item.name                  '_diffrn_detector_element.center[1]'
    _item.category_id             diffrn_detector_element
    _item.mandatory_code          no
    _item_default.value           0.0
    _item_sub_category.id         vector
    _item_type.code               float
    _item_units.code              millimetres

     save_


save__diffrn_detector_element.center[2]
    _item_description.description
;             The value of _diffrn_detector_element.center[2] is the Y
              component of the distortion-corrected beam centre in
              millimetres from the (0, 0) (lower-left) corner of the
              detector element viewed from the sample side.

              The X and Y axes are the laboratory coordinate system
              coordinates defined in the AXIS category measured
              when all positioning axes for the detector are at their zero
              settings.  If the resulting X or Y axis is then orthogonal to the
              detector, the Z axis is used instead of the orthogonal axis.
             
              Because of ambiguity about the setting used to determine this
              center,  use of this data item is deprecated. The data item
              _diffrn_data_frame.center_slow
              which is referenced to the detector coordinate system and not
              directly to the laboratory coordinate system should be used
              instead.

;
    _item.name                  '_diffrn_detector_element.center[2]'
    _item.category_id             diffrn_detector_element
    _item.mandatory_code          no
    _item_default.value           0.0
    _item_sub_category.id         vector
    _item_type.code               float
    _item_units.code              millimetres

     save_



save__diffrn_measurement_axis.id
    _item_description.description
;              This data item is a pointer to _diffrn_measurement.id in
               the DIFFRN_MEASUREMENT category.

               DEPRECATED -- DO NOT USE
;
    _item.name                  '_diffrn_measurement_axis.id'
    _item.category_id             diffrn_measurement_axis
    _item.mandatory_code          no
    _item_type.code               code
     save_

#########################   DEPRECATED CATEGORY #########################
#####################
# DIFFRN_FRAME_DATA #
#####################


save_diffrn_frame_data
    _category.description
;             Data items in the DIFFRN_FRAME_DATA category record
              the details about each frame of data.

              The items in this category are now in the
              DIFFRN_DATA_FRAME category.

              The items in the DIFFRN_FRAME_DATA category
              are now deprecated.  The items from this category
              are provided as aliases in the 1.0 dictionary
              or, in the case of _diffrn_frame_data.details,
              in the 1.4 dictionary.  THESE ITEMS SHOULD NOT
              BE USED FOR NEW WORK.

              The items from the old category are provided
              in this dictionary for completeness
              but should not be used or cited.  To avoid
              confusion, the example has been removed
              and the redundant parent-child links to other
              categories have been removed.
             
              All _item.mandatory_code values have been changed to no
;
    _category.id                   diffrn_frame_data
    _category.mandatory_code       no
     loop_
    _category_key.name             '_diffrn_frame_data.id'
                                   '_diffrn_frame_data.detector_element_id'
     loop_
    _category_group.id             'inclusive_group'
                                   'array_data_group'
     loop_
    _category_examples.detail
    _category_examples.case
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
;
    THE DIFFRN_FRAME_DATA category is deprecated and should not be used.
;
;
       # EXAMPLE REMOVED #
;
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     save_


save__diffrn_frame_data.array_id
    _item_description.description
;             This item is a pointer to _array_structure.id in the
              ARRAY_STRUCTURE category.

              DEPRECATED -- DO NOT USE
;
    _item.name                  '_diffrn_frame_data.array_id'
    _item.category_id             diffrn_frame_data
    _item.mandatory_code          no
    _item_type.code               code
     save_


save__diffrn_frame_data.binary_id
    _item_description.description
;             This item is a pointer to _array_data.binary_id in the
              ARRAY_STRUCTURE category.

              DEPRECATED -- DO NOT USE
;
    _item.name                  '_diffrn_frame_data.binary_id'
    _item.category_id             diffrn_frame_data
    _item.mandatory_code          implicit
    _item_type.code               int
     save_


save__diffrn_frame_data.detector_element_id
    _item_description.description
;             This item is a pointer to _diffrn_detector_element.id
              in the DIFFRN_DETECTOR_ELEMENT category.

              DEPRECATED -- DO NOT USE
;
    _item.name                  '_diffrn_frame_data.detector_element_id'
    _item.category_id             diffrn_frame_data
    _item.mandatory_code          yes
    _item_type.code               code
     save_


save__diffrn_frame_data.id
    _item_description.description
;             The value of _diffrn_frame_data.id must uniquely identify
              each complete frame of data.

              DEPRECATED -- DO NOT USE
;
     loop_
    _item.name
    _item.category_id
    _item.mandatory_code
           '_diffrn_frame_data.id'        diffrn_frame_data  yes
    _item_type.code               code
     save_

save__diffrn_frame_data.details
     _item_description.description
;             The value of _diffrn_data_frame.details should give a
              description of special aspects of each frame of data.

              DEPRECATED -- DO NOT USE
;
     _item.name                  '_diffrn_frame_data.details'
     _item.category_id             diffrn_frame_data
     _item.mandatory_code          no
     _item_type.code               text
      save_

################ END DEPRECATED SECTION ###########


####################
## ITEM_TYPE_LIST ##
####################
#
#
#  The regular expressions defined here are not compliant
#  with the POSIX 1003.2 standard as they include the
#  '\n' and '\t' special characters.  These regular expressions
#  have been tested using version 0.12 of Richard Stallman's
#  GNU regular expression library in POSIX mode.
#  In order to allow presentation of a regular expression
#  in a text field concatenate any line ending in a backslash
#  with the following line, after discarding the backslash.
#
#  A formal definition of the '\n' and '\t' special characters
#  is most properly done in the DDL, but for completeness, please
#  note that '\n' is the line termination character ('newline')
#  and '\t' is the horizontal tab character.  There is a formal
#  ambiguity in the use of '\n' for line termination, in that
#  the intention is that the equivalent machine/OS-dependent line
#  termination character sequence should be accepted as a match, e.g.
#
#      '\r' (control-M) under MacOS
#      '\n' (control-J) under Unix
#      '\r\n' (control-M control-J) under DOS and MS Windows
#
     loop_
    _item_type_list.code
    _item_type_list.primitive_code
    _item_type_list.construct
    _item_type_list.detail
               code      char
               '[_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*'
;              code item types/single words ...
;
               ucode      uchar
               '[_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*'
;              code item types/single words (case insensitive) ...
;
               line      char
               '[][ \t_(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*'
;              char item types / multi-word items ...
;
               uline     uchar
               '[][ \t_(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*'
;              char item types / multi-word items (case insensitive)...
;
               text      char
             '[][ \n\t()_,.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*'
;              text item types / multi-line text ...
;
               binary    char
;\n--CIF-BINARY-FORMAT-SECTION--\n\
[][ \n\t()_,.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*\
\n--CIF-BINARY-FORMAT-SECTION----
;
;              binary items are presented as MIME-like ascii-encoded
               sections in an imgCIF.  In a CBF, raw octet streams
               are used to convey the same information.
;
               int       numb
               '-?[0-9]+'
;              int item types are the subset of numbers that are the negative
               or positive integers.
;
               float     numb
          '-?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?'
;              float item types are the subset of numbers that are the floating
               point numbers.
;
               any       char
               '.*'
;              A catch all for items that may take any form...
;
               yyyy-mm-dd  char
;\
[0-9]?[0-9]?[0-9][0-9]-[0-9]?[0-9]-[0-9]?[0-9]\
((T[0-2][0-9](:[0-5][0-9](:[0-5][0-9](.[0-9]+)?)?)?)?\
([+-][0-5][0-9]:[0-5][0-9]))?
;
;
               Standard format for CIF date and time strings (see
               http://www.iucr.org/iucr-top/cif/spec/datetime.html),
               consisting of a yyyy-mm-dd date optionally followed by
               the character 'T' followed by a 24-hour clock time,
               optionally followed by a signed time-zone offset.

               The IUCr standard has been extended to allow for an optional
               decimal fraction on the seconds of time.

               Time is local time if no time-zone offset is given.

               Note that this type extends the mmCIF yyyy-mm-dd type
               but does not conform to the mmCIF yyyy-mm-dd:hh:mm
               type that uses a ':' in place if the 'T' specified
               by the IUCr standard.  For reading, both forms should
               be accepted,  but for writing, only the IUCr form should
               be used.

               For maximal compatibility, the special time zone
               indicator 'Z' (for 'zulu') should be accepted on
               reading in place of '+00:00' for GMT.
;


#####################
## ITEM_UNITS_LIST ##
#####################

     loop_
    _item_units_list.code
    _item_units_list.detail
#
     'metres'                 'metres'
     'centimetres'            'centimetres (metres * 10^^( -2)^)'
     'millimetres'            'millimetres (metres * 10^^( -3)^)'
     'micrometres'            'micrometres (metres * 10^^( -6)^)'
     'nanometres'             'nanometres  (metres * 10^^( -9)^)'
     'angstroms'              '\%Angstroms   (metres * 10^^(-10)^)'
     'picometres'             'picometres  (metres * 10^^(-12)^)'
     'femtometres'            'femtometres (metres * 10^^(-15)^)'
#
     'reciprocal_metres'      'reciprocal metres (metres^^(-1)^)'
     'reciprocal_centimetres'
        'reciprocal centimetres ((metres * 10^^( -2)^)^^(-1)^)'
     'reciprocal_millimetres'
        'reciprocal millimetres ((metres * 10^^( -3)^)^^(-1)^)'
     'reciprocal_nanometres'
        'reciprocal nanometres  ((metres * 10^^( -9)^)^^(-1)^)'
     'reciprocal_angstroms'
        'reciprocal \%Angstroms   ((metres * 10^^(-10)^)^^(-1)^)'
     'reciprocal_picometres'
        'reciprocal picometres  ((metres * 10^^(-12)^)^^(-1)^)'
#
     'nanometres_squared'     'nanometres squared (metres * 10^^( -9)^)^^2^'
     'angstroms_squared'      '\%Angstroms squared  (metres * 10^^(-10)^)^^2^'
     '8pi2_angstroms_squared'
       '8\p^^2^ * \%Angstroms squared (metres * 10^^(-10)^)^^2^'
     'picometres_squared'     'picometres squared (metres * 10^^(-12)^)^^2^'
#
     'nanometres_cubed'       'nanometres cubed (metres * 10^^( -9)^)^^3^'
     'angstroms_cubed'        '\%Angstroms cubed  (metres * 10^^(-10)^)^^3^'
     'picometres_cubed'       'picometres cubed (metres * 10^^(-12)^)^^3^'
#
     'kilopascals'            'kilopascals'
     'gigapascals'            'gigapascals'
#
     'hours'                  'hours'
     'minutes'                'minutes'
     'seconds'                'seconds'
     'microseconds'           'microseconds'
#
     'degrees'                'degrees (of arc)'
     'degrees_squared'        'degrees (of arc) squared'
#
     'degrees_per_minute'     'degrees (of arc) per minute'
#
     'celsius'                'degrees (of temperature) Celsius'
     'kelvins'                'degrees (of temperature) Kelvin'
#
     'counts'                 'counts'
     'counts_per_photon'      'counts per photon'
#
     'electrons'              'electrons'
#
     'electrons_squared'      'electrons squared'
#
     'electrons_per_nanometres_cubed'
; electrons per nanometres cubed (electrons/(metres * 10^^( -9)^)^^(-3)^)
;
     'electrons_per_angstroms_cubed'
; electrons per \%Angstroms cubed (electrons/(metres * 10^^(-10)^)^^(-3)^)
;
     'electrons_per_picometres_cubed'
; electrons per picometres cubed (electrons/(metres * 10^^(-12)^)^^(-3)^)
;
     'kilowatts'              'kilowatts'
     'milliamperes'           'milliamperes'
     'kilovolts'              'kilovolts'
#
     'pixels_per_element'     '(image) pixels per (array) element'
#
     'arbitrary'
; arbitrary system of units.
;
#

     loop_
    _item_units_conversion.from_code
    _item_units_conversion.to_code
    _item_units_conversion.operator
    _item_units_conversion.factor
###
     'metres'                   'centimetres'              '*'   1.0E+02
     'metres'                   'millimetres'              '*'   1.0E+03
     'metres'                   'nanometres'               '*'   1.0E+09
     'metres'                   'angstroms'                '*'   1.0E+10
     'metres'                   'picometres'               '*'   1.0E+12
     'metres'                   'femtometres'              '*'   1.0E+15
#
     'centimetres'              'metres'                   '*'   1.0E-02
     'centimetres'              'millimetres'              '*'   1.0E+01
     'centimetres'              'nanometres'               '*'   1.0E+07
     'centimetres'              'angstroms'                '*'   1.0E+08
     'centimetres'              'picometres'               '*'   1.0E+10
     'centimetres'              'femtometres'              '*'   1.0E+13
#
     'millimetres'              'metres'                   '*'   1.0E-03
     'millimetres'              'centimetres'              '*'   1.0E-01
     'millimetres'              'nanometres'               '*'   1.0E+06
     'millimetres'              'angstroms'                '*'   1.0E+07
     'millimetres'              'picometres'               '*'   1.0E+09
     'millimetres'              'femtometres'              '*'   1.0E+12
#
     'nanometres'               'metres'                   '*'   1.0E-09
     'nanometres'               'centimetres'              '*'   1.0E-07
     'nanometres'               'millimetres'              '*'   1.0E-06
     'nanometres'               'angstroms'                '*'   1.0E+01
     'nanometres'               'picometres'               '*'   1.0E+03
     'nanometres'               'femtometres'              '*'   1.0E+06
#
     'angstroms'                'metres'                   '*'   1.0E-10
     'angstroms'                'centimetres'              '*'   1.0E-08
     'angstroms'                'millimetres'              '*'   1.0E-07
     'angstroms'                'nanometres'               '*'   1.0E-01
     'angstroms'                'picometres'               '*'   1.0E+02
     'angstroms'                'femtometres'              '*'   1.0E+05
#
     'picometres'               'metres'                   '*'   1.0E-12
     'picometres'               'centimetres'              '*'   1.0E-10
     'picometres'               'millimetres'              '*'   1.0E-09
     'picometres'               'nanometres'               '*'   1.0E-03
     'picometres'               'angstroms'                '*'   1.0E-02
     'picometres'               'femtometres'              '*'   1.0E+03
#
     'femtometres'              'metres'                   '*'   1.0E-15
     'femtometres'              'centimetres'              '*'   1.0E-13
     'femtometres'              'millimetres'              '*'   1.0E-12
     'femtometres'              'nanometres'               '*'   1.0E-06
     'femtometres'              'angstroms'                '*'   1.0E-05
     'femtometres'              'picometres'               '*'   1.0E-03
###
     'reciprocal_centimetres'   'reciprocal_metres'        '*'   1.0E+02
     'reciprocal_centimetres'   'reciprocal_millimetres'   '*'   1.0E-01
     'reciprocal_centimetres'   'reciprocal_nanometres'    '*'   1.0E-07
     'reciprocal_centimetres'   'reciprocal_angstroms'     '*'   1.0E-08
     'reciprocal_centimetres'   'reciprocal_picometres'    '*'   1.0E-10
#
     'reciprocal_millimetres'   'reciprocal_metres'        '*'   1.0E+03
     'reciprocal_millimetres'   'reciprocal_centimetres'   '*'   1.0E+01
     'reciprocal_millimetres'   'reciprocal_nanometres'    '*'   1.0E-06
     'reciprocal_millimetres'   'reciprocal_angstroms'     '*'   1.0E-07
     'reciprocal_millimetres'   'reciprocal_picometres'    '*'   1.0E-09
#
     'reciprocal_nanometres'    'reciprocal_metres'        '*'   1.0E+09
     'reciprocal_nanometres'    'reciprocal_centimetres'   '*'   1.0E+07
     'reciprocal_nanometres'    'reciprocal_millimetres'   '*'   1.0E+06
     'reciprocal_nanometres'    'reciprocal_angstroms'     '*'   1.0E-01
     'reciprocal_nanometres'    'reciprocal_picometres'    '*'   1.0E-03
#
     'reciprocal_angstroms'     'reciprocal_metres'        '*'   1.0E+10
     'reciprocal_angstroms'     'reciprocal_centimetres'   '*'   1.0E+08
     'reciprocal_angstroms'     'reciprocal_millimetres'   '*'   1.0E+07
     'reciprocal_angstroms'     'reciprocal_nanometres'    '*'   1.0E+01
     'reciprocal_angstroms'     'reciprocal_picometres'    '*'   1.0E-02
#
     'reciprocal_picometres'    'reciprocal_metres'        '*'   1.0E+12
     'reciprocal_picometres'    'reciprocal_centimetres'   '*'   1.0E+10
     'reciprocal_picometres'    'reciprocal_millimetres'   '*'   1.0E+09
     'reciprocal_picometres'    'reciprocal_nanometres'    '*'   1.0E+03
     'reciprocal_picometres'    'reciprocal_angstroms'     '*'   1.0E+01
###
     'nanometres_squared'       'angstroms_squared'        '*'   1.0E+02
     'nanometres_squared'       'picometres_squared'       '*'   1.0E+06
#
     'angstroms_squared'        'nanometres_squared'       '*'   1.0E-02
     'angstroms_squared'        'picometres_squared'       '*'   1.0E+04
     'angstroms_squared'        '8pi2_angstroms_squared'   '*'   78.9568

#
     'picometres_squared'       'nanometres_squared'       '*'   1.0E-06
     'picometres_squared'       'angstroms_squared'        '*'   1.0E-04
###
     'nanometres_cubed'         'angstroms_cubed'          '*'   1.0E+03
     'nanometres_cubed'         'picometres_cubed'         '*'   1.0E+09
#
     'angstroms_cubed'          'nanometres_cubed'         '*'   1.0E-03
     'angstroms_cubed'          'picometres_cubed'         '*'   1.0E+06
#
     'picometres_cubed'         'nanometres_cubed'         '*'   1.0E-09
     'picometres_cubed'         'angstroms_cubed'          '*'   1.0E-06
###
     'kilopascals'              'gigapascals'              '*'   1.0E-06
     'gigapascals'              'kilopascals'              '*'   1.0E+06
###
     'hours'                    'minutes'                  '*'   6.0E+01
     'hours'                    'seconds'                  '*'   3.6E+03
     'hours'                    'microseconds'             '*'   3.6E+09
#
     'minutes'                  'hours'                    '/'   6.0E+01
     'minutes'                  'seconds'                  '*'   6.0E+01
     'minutes'                  'microseconds'             '*'   6.0E+07
#
     'seconds'                  'hours'                    '/'   3.6E+03
     'seconds'                  'minutes'                  '/'   6.0E+01
     'seconds'                  'microseconds'             '*'   1.0E+06
#
     'microseconds'             'hours'                    '/'   3.6E+09
     'microseconds'             'minutes'                  '/'   6.0E+07
     'microseconds'             'seconds'                  '/'   1.0E+06
###
     'celsius'                  'kelvins'                  '-'     273.0
     'kelvins'                  'celsius'                  '+'     273.0
###
     'electrons_per_nanometres_cubed'
     'electrons_per_angstroms_cubed'                       '*'   1.0E+03
     'electrons_per_nanometres_cubed'
     'electrons_per_picometres_cubed'                      '*'   1.0E+09
#
     'electrons_per_angstroms_cubed'
     'electrons_per_nanometres_cubed'                      '*'   1.0E-03
     'electrons_per_angstroms_cubed'
     'electrons_per_picometres_cubed'                      '*'   1.0E+06
#
     'electrons_per_picometres_cubed'
     'electrons_per_nanometres_cubed'                      '*'   1.0E-09
     'electrons_per_picometres_cubed'
     'electrons_per_angstroms_cubed'                       '*'   1.0E-06
###

########################
## DICTIONARY_HISTORY ##
########################

     loop_
    _dictionary_history.version
    _dictionary_history.update
    _dictionary_history.revision

    1.8.2    2021-02-21

;   Corrections and additions for ITVG 2021

    + Add McStas as an axis coordinate system
    + Add _array_intensities.underload as optional
    + Add _diffrn_scan_collection.details as optional
    + Add _diffrn_scan_collection.variant as optional
;

    1.8.1    2021-01-30

;   Copy-paste error corrections (JRH)

    + Fix double underscore in _diffrn_data_frame.center_derived
    + Fix wrong _item.name in _diffrn_scan.date_end_estimated
    + Fix wrong _item.mandatory_code in _diffrn_scan_frame_monitor.frame_id
    + Fix wrong _item.mandatory_code in _variant.variant_of
;

    1.8.0    2021-01-24

;   Changes for 2021 ITVG and conformance with Gold Standard and NXmx (HJB)

    + Add _diffrn_data_frame.center_derived as optional
    + Add _diffrn_measurement.sample_detector_distance_derived as optional
    + Change _diffrn_scan.date_start to mandatory
    + Add _diffrn_scan.date_end_estimated as mandatory
    + Fix .array_id and .binary_id columns to be implicit in all cases to facilitate mini_cbfs

;

   
    1.7.11   2018-12-03
   
;   Changes for CBFlib 0.9.6 release (HJB)
   
    + Remove _array_structure_list.array_section_id
    + Revisions to _category.NX_mapping_details in most categories for
    array sections.
    + Change to uniform use of entry:NXentry
    + Change to uniform use of identification of NXdetector by detector
    element
    + Change to uniform use of data_ARRAYID_BINARYID
    + Add _array_structure_list.array_section_id
    + Add _map_segment.mask_array_section_id
    + Add _diffrn_scan_collection.scan_id
    + Add _diffrn_scan_collection.type
    + Add _diffrn_scan_collection.translation_width
    + Add _diffrn_radiation.beam_width
    + Add _diffrn_radiation.beam_heigth
    + Add _diffrn_radiation.beam_flux
   
;


    1.7.10   2014-04-25
   
;  Additions of esd's to polarization tags.  Change to NeXus mapping to use
   NXtransformations instead of NXpoise (HJB)
   
    + Add _diffrn_radiation.polarisn_norm_esd,
    _diffrn_radiation.polarisn_ratio_esd,
    _diffrn_radiation.polarizn_source_norm_esd,
    _diffrn_radiation.polarizn_source_ratio_esd,
    _diffrn_radiation.polarizn_Stokes_I_esd,
    _diffrn_radiation.polarizn_Stokes_Q_esd,
    _diffrn_radiation.polarizn_Stokes_U_esd,
    _diffrn_radiation.polarizn_Stokes_V_esd,
    _diffrn_scan_frame.polarizn_Stokes_I_esd,
    _diffrn_scan_frame.polarizn_Stokes_Q_esd,
    _diffrn_scan_frame.polarizn_Stokes_U_esd,
    _diffrn_scan_frame.polarizn_Stokes_V_esd.
    + Change NeXus mapping for ARRAY_STRUCTURE_LIST
    ARRAY_STRUCTURE_LIST_AXIS, AXIS,
    DIFFRN_DETECTOR_AXIS, DIFFRN_MEASUREMENT_AXIS,
    DIFFRN_SCAN_FRAME_AXIS.
   
;
   
    1.7.9   2014-04-05
   
;  Corrections to Stokes parameter description. (HJB)
   
    + Clarify the meaning of _diffrn_radiation.polarizn_Stokes_I
    and _diffrn_scan_frame.polarizn_Stokes_I to explicitly include non-polarized
        component.

    + Provide missing factor of 2 in _diffrn_radiation.polarizn_Stokes_V
    description and _diffrn_scan_frame.polarizn_Stokes_V description.
   
;

   
    1.7.8   2014-02-22
   
;  Minor changes to NeXus mapping. (HJB)
   
       + Conform NeXus mapping of DIFFRN_DETECTOR to neXus
       NXdetector base class terminology
   
       + Add _diffrn_detector.gain_setting to handle
       the reverse mapping fron NeXus of the equivalent field in NXdetector.
;
   
    1.7.7   2014-02-22
   
;  Major changes to NeXus mapping to conform to JS functional
    mapping prototype, add Stoke parameter tags for polarization
    and beam intensity, and add an new tag for FEL axes (HJB)
   
       + Add
       _axis.equipment_component,
       _diffrn_radiation.polarizn_Stokes_I,
       _diffrn_radiation.polarizn_Stokes_Q,
       _diffrn_radiation.polarizn_Stokes_U,
       _diffrn_radiation.polarizn_Stokes_V,
       _diffrn_scan_frame.polarizn_Stokes_I,
       _diffrn_scan_frame.polarizn_Stokes_Q,
       _diffrn_scan_frame.polarizn_Stokes_U,
       _diffrn_scan_frame.polarizn_Stokes_V.
       + Remove erroneous type code from _diffrn_scan_frame_monitor.value.
       + Update dictionary version
;
   

   
    1.7.6   2013-10-29
   
;  To avoid a conflict with PDB software, remove the null value
    enumeration for _variant.role (HJB)
   
;

   
    1.7.5   2013-10-27
   
;  At request of JW for the PDB move _category.NX_mapping_details
   to be adjacent to other category tags. (HJB)
   
;

    1.7.4   2013-10-23
   
;  Minor cleanup and rmeove spurious tag
   
    +  remove spurious _array_structure_list_section.array_set_id
    references. (JS)
    +  Change case of category names to conform to PDB conventions. (JW)
   
;

   
    1.7.3   2013-10-15
   
;  Major cleanup of dictionary typos, misplaced loops, etc
       by John Westbrook
   
    +  Change _item.mandatory_code of all *.variant to implicit
    +  Add _diffrn_refln.id and _diffrn_refln.diffrn_id
    +  Correct many _item.name values that were wrong or missing
       quote marks
   
;


   
    1.7.2   2013-10-07
   
;  Add FEL detector positioning tags and change back to NXgoniometer
   
    +  Add
       _axis.rotation_axis and
       _axis.rotation and
    +  Change NXsample back to NXgoniometer
   
;

    1.7.1   2013-08-10
   
;  Minor cleanup (HJB)
   
    +  Correction to description of
         _diffrn_data_frame.array_section_id
    +  Change NXgoniometer to NXsample
    +  Fix typos in NeXus mappings
   
;
   
    1.7     2013-06-18
   
;  Additions to start merge of CBF, HDF5 and NeXus (HJB)
   
    +  Define new ARRAY_STRUCTURE_LIST_SECTION category
    +  Add new _category.NX_mapping_details DDL tag to carry
       details on NeXus category mappings.
    +  Define new tags _array_structure_list_section.array_id,
       _array_structure_list_section.id,
       _array_structure_list_section.index,
       _array_structure_list_section.end,
       _array_structure_list_section.start,
       _array_structure_list_section.stride,
       _array_structure_list_section.variant,
       _diffrn_data_frame.array_section_id,
       _diffrn_detector.layer_thickness,
       _map_segment.array_section_id,
       _map_segment.mask_array_section_id

;
   
    1.6.4   2011-07-02
  
;  Corrections to support DLS Dectris header as per G. Winter (HJB)

    +  Define new tags _diffrn_scan.time_period,
       _diffrn_scan.time_rstrt_incr,
       _diffrn_scan_frame.time_period,
       _diffrn_scan_frame.time_rstrt_incr
    +  fix bad category name in loop in _diffrn_detector.id
    +  remove stray text field terminator at line 4642
    +  fix unquoted tag as a value in _diffrn_scan_frame_monitor.id
    +  make formerly mandatory and implicit deprecated items non-mandatory

;

   1.6.3   2010-08-26
  
;  Cummulative corrections from 1.6.0, 1, 2 drafts (HJB)

    +  Move descriptive dictionary comments into
    _datablock.description with catgeory tree described
    +  add default _array_data.array_id value of 1
    +  add option of CBF_BACKGROUND_OFFSET_DELTA compression
    +  add VARIANT category and tags
    +  add DIFFRN_SCAN_FRAME_MONITOR category

;

   1.5.4   2007-07-28

;  Typographics corrections (HJB)

     + Corrected embedded degree characters to \%
     + Corrected embedded Aring to \%A
     + Added trailing ^ for a power
     + Removed 2 cases of a space after an underscore
       in tag name.
;
 
   1.5.3   2007-07-08
  
;  Changes to support SLS miniCBF and suggestions
   from the 24 May 07 BNL imgCIF workshop (HJB)

     + Added new data items
       '_array_data.header_contents',
       '_array_data.header_convention',
       '_diffrn_data_frame.center_fast',
       '_diffrn_data_frame.center_slow',
       '_diffrn_data_frame.center_units',
       '_diffrn_measurement.sample_detector_distance',
       '_diffrn_measurement.sample_detector_voffset
     + Deprecated data items
       '_diffrn_detector_element.center[1]',
       '_diffrn_detector_element.center[2]'
     + Added comments and example on miniCBF
     + Changed all array_id data items to implicit
;
  
   1.5.2   2007-05-06
  
;  Further clarifications of the coordinate system. (HJB)
;

   1.5.1   2007-04-26
  
;  Improve defintion of X-axis to cover the case of no goniometer
   and clean up more line folds (HJB)
;

   1.5     2007-07-25
  
;  This is a cummulative list of the changes proposed since the
   imgCIF workshop in Hawaii in July 2006.  It is the result
   of contributions by H. J. Bernstein, A. Hammersley,
   J. Wright and W. Kabsch.
  
   2007-02-19 Consolidated changes (edited by HJB)
     + Added new data items
       '_array_structure.compression_type_flag',
       '_array_structure_list_axis.fract_displacement',
       '_array_structure_list_axis.displacement_increment',
       '_array_structure_list_axis.reference_angle',
       '_array_structure_list_axis.reference_displacement',
       '_axis.system',
       '_diffrn_detector_element.reference_center_fast',
       '_diffrn_detector_element.reference_center_slow',
       '_diffrn_scan_axis.reference_angle',
       '_diffrn_scan_axis.reference_displacement',
       '_map.details', '_map.diffrn_id',
       '_map.entry_id', '_map.id',
       '_map_segment.array_id', '_map_segment.binary_id',
       '_map_segment.mask_array_id', '_map_segment.mask_binary_id',
       '_map_segment.id', '_map_segment.map_id',
       '_map_segment.details.
     + Change type of
       '_array_structure.byte_order' and
       '_array_structure.compression_type'
       to ucode to make these values case-insensitive
     + Add values 'packed_v2' and 'byte_offset' to enumeration of values for
       '_array_structure.compression_type'
     + Add to definitions for the binary data type to handle new compression
       types, maps, and a variety of new axis types.
    2007-07-25 Cleanup of typos for formal release (HJB)
     + Corrected text fields for reference_ tag descriptions that
       were off by one column
     + Fix typos in comments listing fract_ tags
     + Changed name of release from 1.5_DRAFT to 1.5
     + Fix unclosed text fields in various map definitions
     
;

   1.4     2006-07-04

;  This is a change to reintegrate all changes made in the course of
   publication of ITVG, by the RCSB from April 2005 through
   August 2008 and changes for the 2006 imgCIF workshop in
   Hawaii.

   2006-07-04 Consolidated changes for the 2006 imgCIF workshop (edited by HJB)
     + Correct type of '_array_structure_list.direction' from 'int' to 'code'.
     + Added new data items suggested by CN
       '_diffrn_data_frame.details'
       '_array_intensities.pixel_fast_bin_size',
       '_array_intensities.pixel_slow_bin_size and
       '_array_intensities.pixel_binning_method
     + Added deprecated item for completeness
       '_diffrn_frame_data.details'
     + Added entry for missing item in contents list
       '_array_structure_list_axis.displacement'
     + Added new MIME type X-BASE32K based on work by VL, KM, GD, HJB
     + Correct description of MIME boundary delimiter to start in
       column 1.
     + General cleanup of text fields to conform to changes for ITVG
       by removing empty lines at start and finish of text field.
     + Amend example for ARRAY_INTENSITIES to include binning.
     + Add local copy of type specification (as 'code') for all children
       of '_diffrn.id'.
     + For consistency, change all references to 'pi' to '\p' and all
       references to 'Angstroms' to '\%Angstroms'.
     + Clean up all powers to use IUCr convention of '^power^', as in
       '10^3^' for '10**3'.
     + Update 'yyyy-mm-dd' type regex to allow truncation from the right
       and improve comments to explain handling of related mmCIF
       'yyyy-mm-dd:hh:mm' type, and use of 'Z' for GMT time zone.

   2005-03-08 and
   2004-08-08 fixed cases where _item_units.code  used
              instead of _item_type.code (JDW)
   2004-04-15 fixed item ordering in
               _diffrn_measurement_axis.measurement_id
               added sub_category 'vector' (JDW)
;

   1.3.2   2005-06-25

;  2005-06-25 ITEM_TYPE_LIST: code, ucode, line, uline regexps updated
              to those of current mmCIF; float modified by allowing integers
              terminated by a point as valid. The 'time' part of
              yyyy-mm-dd types made optional in the regexp. (BM)

   2005-06-17 Minor corrections as for proofs for IT G Chapter 4.6
   (NJA)

   2005-02-21  Minor corrections to spelling and punctuation
   (NJA)

   2005-01-08 Changes as per Nicola Ashcroft.
   + Updated example 1 for DIFFRN_MEASUREMENT to agree with mmCIF.
   + Spelled out "micrometres" for "um" and "millimetres" for "mm".
   + Removed phrase "which may be stored" from ARRAY_STRUCTURE
     description.
   + Removed unused 'byte-offsets' compressions and updated
     cites to ITVG for '_array_structure.compression_type'.
   (HJB)
;

   1.3.1   2003-08-13
;
   Changes as per Frances C. Bernstein.
   + Identify initials.
   + Adopt British spelling for centre in text.
   + Set \p and \%Angstrom and powers.
   + Clean up commas and unclear wordings.
   + Clean up tenses in history.
   Changes as per Gotzon Madariaga.
   + Fix the ARRAY_DATA example to align '_array_data.binary_id'
   and X-Binary-ID.
   + Add a range to '_array_intensities.gain_esd'.
   + In the example of DIFFRN_DETECTOR_ELEMENT,
   '_diffrn_detector_element.id' and
   '_diffrn_detector_element.detector_id' interchanged.
   + Fix typos for direction, detector and axes.
   + Clarify description of polarisation.
   + Clarify axes in '_diffrn_detector_element.center[1]'
    '_diffrn_detector_element.center[2]'.
   + Add local item types for items that are pointers.
   (HJB)
;


   1.3.0   2003-07-24
;
   Changes as per Brian McMahon.
   + Consistently quote tags embedded in text.
   + Clean up introductory comments.
   + Adjust line lengths to fit in 80 character window.
   + Fix several descriptions in AXIS category which
     referred to '_axis.type' instead of the current item.
   + Fix erroneous use of deprecated item
     '_diffrn_detector_axis.id' in examples for
     DIFFRN_SCAN_AXIS.
   + Add deprecated items '_diffrn_detector_axis.id'
     and '_diffrn_measurement_axis.id'.
   (HJB)
;


   1.2.4   2003-07-14
;
   Changes as per I. David Brown.
   + Enhance descriptions in DIFFRN_SCAN_AXIS to make them less
     dependent on the descriptions in DIFFRN_SCAN_FRAME_AXIS.
   + Provide a copy of the deprecated DIFFRN_FRAME_DATA
     category for completeness.
   (HJB)
;


   1.2.3   2003-07-03
;
   Cleanup to conform to ITVG.
   + Correct sign error in ..._cubed units.
   + Correct '_diffrn_radiation.polarisn_norm' range.
   (HJB)
;


   1.2.2   2003-03-10
;
   Correction of typos in various DIFFRN_SCAN_AXIS descriptions.
   (HJB)
;


   1.2.1   2003-02-22
;
   Correction of ATOM_ for ARRAY_ typos in various descriptions.
   (HJB)
;


   1.2     2003-02-07
;
   Corrections to encodings (remove extraneous hyphens) remove
   extraneous underscore in '_array_structure.encoding_type'
   enumeration.  Correct typos in items units list.  (HJB)
;


   1.1.3   2001-04-19
;
   Another typo corrections by Wilfred Li, and cleanup by HJB.
;


   1.1.2   2001-03-06
;
   Several typo corrections by Wilfred Li.
;


   1.1.1   2001-02-16
;
   Several typo corrections by JW.
;


   1.1     2001-02-06
;
   Draft resulting from discussions on header for use at NSLS.  (HJB)

   + Change DIFFRN_FRAME_DATA to DIFFRN_DATA_FRAME.

   + Change '_diffrn_detector_axis.id' to '_diffrn_detector_axis.detector_id'.

   + Add '_diffrn_measurement_axis.measurement_device' and change
     '_diffrn_measurement_axis.id' to
     '_diffrn_measurement_axis.measurement_id'.

   + Add '_diffrn_radiation.div_x_source', '_diffrn_radiation.div_y_source',
    '_diffrn_radiation.div_x_y_source',
    '_diffrn_radiation.polarizn_source_norm',
   '_diffrn_radiation.polarizn_source_ratio', '_diffrn_scan.date_end',
   '_diffrn_scan.date_start', '_diffrn_scan_axis.angle_rstrt_incr',
   '_diffrn_scan_axis.displacement_rstrt_incr',
   '_diffrn_scan_frame_axis.angle_increment',
   '_diffrn_scan_frame_axis.angle_rstrt_incr',
   '_diffrn_scan_frame_axis.displacement',
   '_diffrn_scan_frame_axis.displacement_increment',and
   '_diffrn_scan_frame_axis.displacement_rstrt_incr'.

   + Add '_diffrn_measurement.device' to category key.

   + Update yyyy-mm-dd to allow optional time with fractional seconds
     for time stamps.

   + Fix typos caught by RS.

   + Add ARRAY_STRUCTURE_LIST_AXIS category, and use concept of axis sets to
     allow for coupled axes, as in spiral scans.

   + Add examples for fairly complete headers thanks to R. Sweet and P.
     Ellis.
;


   1.0     2000-12-21
;
   Release version - few typos and tidying up.  (BM & HJB)

   + Move ITEM_TYPE_LIST, ITEM_UNITS_LIST and DICTIONARY_HISTORY to end
   of dictionary.

   + Alphabetize dictionary.
;


   0.7.1   2000-09-29
;
   Cleanup fixes.  (JW)

   + Correct spelling of DIFFRN_MEASUREMENT_AXIS in '_axis.id'

   + Correct ordering of uses of '_item.mandatory_code' and
   '_item_default.value'.
;


   0.7.0   2000-09-09
;
   Respond to comments by I. David Brown.  (HJB)

   + Add further comments on '\n' and '\t'.

   + Update ITEM_UNITS_LIST by taking section from mmCIF dictionary
     and adding metres.  Change 'meter' to 'metre' throughout.

   + Add missing enumerations to '_array_structure.compression_type'
     and make 'none' the default.

   + Remove parent-child relationship between
     '_array_structure_list.index' and '_array_structure_list.precedence'.

   + Improve alphabetization.

   + Fix '_array_intensities.gain_esd' related function.

   + Improve comments in AXIS.

   + Fix DIFFRN_FRAME_DATA example.

   + Remove erroneous DIFFRN_MEASUREMENT example.

   + Add '_diffrn_measurement_axis.id' to the category key.
;


   0.6.0   1999-01-14
;
   Remove redundant information for ENC_NONE data.  (HJB)

   + After the D5 remove binary section identifier, size and
     compression type.

   + Add Control-L to header.
;


   0.5.1   1999-01-03
;
   Cleanup of typos and syntax errors.  (HJB)

   + Cleanup example details for DIFFRN_SCAN category.

   + Add missing quote marks for '_diffrn_scan.id' definition.
;


   0.5   1999-01-01
;
   Modifications for axis definitions and reduction of binary header.  (HJB)

   + Restore '_diffrn_detector.diffrn_id' to DIFFRN_DETECTOR KEY.

   + Add AXIS category.

   + Bring in complete DIFFRN_DETECTOR and DIFFRN_MEASUREMENT categories
     from cif_mm.dic for clarity.

   + Change '_array_structure.encoding_type' from type code to uline and
     added X-Binary-Element-Type to MIME header.

   + Add detector beam centre '_diffrn_detector_element.center[1]' and
     '_diffrn_detector_element.center[2]'.

   + Correct item name of '_diffrn_refln.frame_id'.

   + Replace reference to '_array_intensities.undefined' by
     '_array_intensities.undefined_value'.

   + Replace references to '_array_intensity.scaling' with
     '_array_intensities.scaling'.

   + Add DIFFRN_SCAN... categories.
;


   0.4   1998-08-11
;
   Modifications to the 0.3 imgCIF draft.  (HJB)

   + Reflow comment lines over 80 characters and corrected typos.

   + Update examples and descriptions of MIME encoded data.

   + Change name to cbfext98.dic.
;


   0.3   1998-07-04
;
   Modifications for imgCIF.  (HJB)

   + Add binary type, which is a text field containing a variant on
     MIME encoded data.

   + Change type of '_array_data.data' to binary and specify internal
     structure of raw binary data.

   + Add '_array_data.binary_id', and make
     '_diffrn_frame_data.binary_id' and '_array_intensities.binary_id'
     into pointers to this item.
;


   0.2   1997-12-02
;
   Modifications to the CBF draft.  (JW)

   + Add category hierarchy for describing frame data developed from
     discussions at the BNL imgCIF Workshop Oct 1997.   The following
     changes are made in implementing the workshop draft.  Category
     DIFFRN_array_data is renamed to DIFFRN_FRAME_DATA.  Category
     DIFFRN_FRAME_TYPE is renamed to DIFFRN_DETECTOR_ELEMENT.   The
     parent item for '_diffrn_frame_data.array_id' is changed from
     '_array_structure_list.array_id' to '_array_structure.id'. Item
     '_diffrn_detector.array_id' is deleted.
   + Add data item '_diffrn_frame_data.binary_id' to identify data
     groups within a binary section.  The formal identification of the
     binary section is still fuzzy.
;


   0.1   1997-01-24
;
   First draft of this dictionary in DDL 2.1 compliant format by John
   Westbrook (JW).  This version is adapted from the Crystallographic
   Binary File (CBF) Format Draft Proposal provided by Andy Hammersley
   (AH).

   Modifications to the CBF draft.  (JW)

   + In this version the array description has been cast in the categories
     ARRAY_STRUCTURE and ARRAY_STRUCTURE_LIST.  These categories
     have been generalized to describe array data  of arbitrary dimension.

   + Array data in this description are contained in the category
     ARRAY_DATA.  This departs from the CBF notion of data existing
     in some special comment. In this description, data are handled as an
     ordinary data item encapsulated in a character data type.   Although
     data this manner deviates from CIF conventions, it does not violate
     any DDL 2.1 rules.  DDL 2.1 regular expressions can be used to define
     the binary representation which will permit some level of data
     validation.  In this version, the placeholder type code "any" has
     been used. This translates to a regular expression which will match
     any pattern.

     It should be noted that DDL 2.1 already supports array data objects
     although these have not been used in the current mmCIF dictionary.
     It may be possible to use the DDL 2.1 ITEM_STRUCTURE and
     ITEM_STRUCTURE_LIST categories to provide the information that is
     carried in by the ARRAY_STRUCTURE and ARRAY_STRUCTURE_LIST.  By
     moving the array structure to the DDL level it would be possible to
     define an array type as well as a regular expression defining the
     data format.

   + Multiple array sections can be properly handled within a single
     datablock.
;


