# B Element

Represents different information depending on its parent element. The following table describes the B element based on its parent element.

Parent element | Description of B element | Default unit
Scratch | A general-purpose scratch element. | NUM
EllipticalArcTo | The y-coordinate of an arc's control point. | DL
NURBSTo | The last weight of the nonuniform rational B-spline (NURBS). | NUM
SplineStart | The first knot of a spline. | NUM
InfiniteLine | A y-coordinate of a point on an infinite line; paired with an x-coordinate represented by the A element. | DL
Ellipse | A y-coordinate of a point on an ellipse; paired with an x-coordinate represented by the A element. | DL
ConnectionABCD | A general-purpose element. | NUM

## Syntax

    <B
        [Unit]
        [F]
        [Err]
        [V]>
    </B>

## Attributes

Optional string. Represents a unit of measure. Default values are described in the preceding table. For details about a particular unit of measure, see Units of measure.

F

Optional string. Represents the element's formula. This attribute can contain one of the following strings: "someFormula" if the formula exists locally, "No Formula" if the formula is locally deleted or blocked, or "Inh" if the formula is inherited.

If the attribute is not present, the element's formula is a simple constant, for example, <element>5</element>.

Err

Optional string. Indicates that the formula evaluates to an error. The value of Err is the current value (an error message string); the value of the element is the last valid value.

V

Optional string. Represents the null string condition for a string cell value. In some cases it is helpful to distinguish between an empty string cell null and a null string cell value. This attribute is used to distinguish between these forms of an empty value.

## Element properties

Property | Value
--- | ---
Name | B
Minimum Occurrences | 0
Maximum Occurrences | 1

## Element information

Parent elements

Scratch

ConnectionABCD

InfiniteLine

Ellipse

EllipticalArcTo

SplineStart

NURBSTo

Child elements

SolutionXML

## Remarks

The B element is relevant only when contained in a DocumentSheet, PageSheet, or Shape element. It is ignored when contained in a StyleSheet element.

The SolutionXML element should be present only in a B element contained in a Scratch element. If it is contained within other elements it is ignored and a warning is written to the warning log file.

## See also

B cell (Geometry section)

Geom element

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