<?xml version="1.0" encoding="UTF-8"?>
<!-- ============================================================= -->
<!--                    HEADER                                     -->
<!-- ============================================================= -->
<!-- ============================================================= -->
<!--  MODULE:    DITA MAP XSD Module                               -->
<!--  VERSION:   1.2                                             -->
<!--  DATE:      November 2009                                     -->
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<!-- ============================================================= -->
<!-- SYSTEM:     Darwin Information Typing Architecture (DITA)     -->
<!--                                                               -->
<!-- PURPOSE:    W3C XML Schema to describe DITA maps              -->
<!--                                                               -->
<!-- ORIGINAL CREATION DATE:                                       -->
<!--             March 2001                                        -->
<!--                                                               -->
<!--             (C) Copyright OASIS-Open.org 2005, 2009                -->
<!--             (C) Copyright IBM Corporation 2001, 2004.         -->
<!--             All Rights Reserved.                              -->
<!--                                                               -->
<!--  UPDATES:                                                     -->
<!--    2005.11.15 EAS: Moved domains attribute definition to      -->
<!--                    map.xsd                                    -->
<!-- ============================================================= -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified" xmlns:ditaarch="http://dita.oasis-open.org/architecture/2005/">

   <!-- ======= IMPORT - XML attributes and namespace ======= -->
   <xs:import namespace="http://dita.oasis-open.org/architecture/2005/" schemaLocation="urn:oasis:names:tc:dita:xsd:ditaarch.xsd:1.2"/>

  <!-- STRUCTURAL MEMBERS ======================================================== -->
  <!-- things that can be nested under topic after body - redefined when specializing -->
  <!--xs:simpleType name="topicreftypes.class">
    <xs:restriction base="xs:string">
      <xs:enumeration value="topic"/>
      <xs:enumeration value="concept"/>
      <xs:enumeration value="task"/>
      <xs:enumeration value="reference"/>
      <xs:enumeration value="external"/>
      <xs:enumeration value="local"/>
    </xs:restriction>
  </xs:simpleType>-->

  <xs:attributeGroup name="topicref-atts">
    <xs:annotation>
      <xs:documentation>
        The %topicref-atts; parameter entity represents a group of attributes
        used in numerous map elements: map, topicref, relcolspec, relcell, topichead,
        and topicgroup. The set is similar to those documented in <xref href="topicref-atts-no-toc.xml">topicref-atts-no-toc</xref>
        but includes the <i><keyword>toc</keyword></i> attribute.
      </xs:documentation>
    </xs:annotation>
     <xs:attribute name="collection-type" type="collection-type.class"/>
     <xs:attribute name="type" type="xs:string"/>
    <xs:attribute name="processing-role" type="processing-role-att.class" />
     <xs:attribute name="scope" type="scope-att.class"/>
     <xs:attribute name="locktitle" type="yesno-att.class"/>
     <xs:attribute name="format" type="xs:string"/>
     <xs:attribute name="linking" type="linkingtypes.class"/>
     <xs:attribute name="toc" type="yesno-att.class"/>
     <xs:attribute name="print" type="print-att.class"/>
     <xs:attribute name="search" type="yesno-att.class"/>
     <xs:attribute name="chunk" type="xs:string"/>
  </xs:attributeGroup>

  <xs:simpleType name="collection-type.class">
   <xs:restriction base="xs:string">
     <xs:enumeration value="choice"/>
     <xs:enumeration value="unordered"/>
     <xs:enumeration value="sequence"/>
     <xs:enumeration value="family"/>
     <xs:enumeration value="-dita-use-conref-target"/>
   </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="linkingtypes.class">
   <xs:restriction base="xs:string">
     <xs:enumeration value="targetonly"/>
     <xs:enumeration value="sourceonly"/>
     <xs:enumeration value="normal"/>
     <xs:enumeration value="none"/>
     <xs:enumeration value="-dita-use-conref-target"/>
   </xs:restriction>
  </xs:simpleType>


  <xs:attributeGroup name="topicref-atts-no-toc">
    <xs:annotation>
      <xs:documentation>
        The %topicref-atts-no-toc; parameter entity represents the set
        of attributes used in the 
          <xref href="reltable.xml">reltable</xref>
         map
        element. The set is similar to those documented in 
          <xref href="topicref-atts.xml">topicref-atts</xref>
         but
        for &lt;<keyword>reltable</keyword>&gt; the <i><keyword>toc</keyword></i> attribute
        defaults to <q>no</q>. For the other elements that use the %topicref-atts;
        group declaration, the <i><keyword>toc</keyword></i> attribute doesn't have
        a default; they can inherit their <i><keyword>toc</keyword></i> value from
        the nearest container, otherwise it functions upon output as if set to <q>yes</q>.
      </xs:documentation>
    </xs:annotation>
    <xs:attribute name="collection-type" type="collection-type.class"/>
     <xs:attribute name="type" type="xs:string"/>
    <xs:attribute name="processing-role" type="processing-role-att.class" />
     <xs:attribute name="scope" type="scope-att.class"/>
     <xs:attribute name="locktitle" type="yesno-att.class"/>
     <xs:attribute name="format" type="xs:string"/>
     <xs:attribute name="linking" type="linkingtypes.class"/>
     <xs:attribute name="toc" type="yesno-att.class" default="no"/>
     <xs:attribute name="print" type="print-att.class"/>
     <xs:attribute name="search" type="yesno-att.class"/>
     <xs:attribute name="chunk" type="xs:string"/>
  </xs:attributeGroup>
   
   <xs:simpleType name="print-att.class">
        <xs:restriction base="xs:string">
            <xs:enumeration value="yes"/>
            <xs:enumeration value="no"/>
            <xs:enumeration value="printonly"/>
            <xs:enumeration value="-dita-use-conref-target"/>
        </xs:restriction>
    </xs:simpleType>

  

  <xs:element name="map">
    <xs:annotation>
      <xs:documentation>
        The &lt;<keyword>map</keyword>&gt; element is used to define a map
        which describes the relationships among a set of DITA topics. Maps consist
        of references to topics organized into hierarchies and tables. Maps provide
        a way to express these relationships in a single common format that can be
        used for different outputs. 
      </xs:documentation>
    </xs:annotation>
    <xs:complexType>
      <xs:complexContent>
        <xs:extension base="map.class">
          <xs:attribute ref="class" default="- map/map " />
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="map.class" >
    <xs:sequence>
      <xs:group ref="map.content"/>
    </xs:sequence>
    <xs:attributeGroup ref="map.attributes"/>
  </xs:complexType>
   
   <xs:group name="map.content">
     <xs:sequence>
       <xs:sequence>
         <xs:group ref="title" minOccurs="0" />
         <xs:group ref="topicmeta" minOccurs="0" />
         <xs:choice minOccurs="0" maxOccurs="unbounded">
           <xs:group ref="navref" />
           <xs:group ref="anchor" />
           <xs:group ref="topicref" />
           <xs:group ref="reltable" />
           <xs:group ref="data.elements.incl" />
         </xs:choice>      
       </xs:sequence>
     </xs:sequence>
   </xs:group>
   
   <xs:attributeGroup name="map.attributes">
     <xs:attribute name="title" type="xs:string" />
    <xs:attribute name="id" type="xs:ID" />
    <xs:attributeGroup ref="conref-atts" />
    <xs:attribute name="anchorref" type="xs:string" />
    <xs:attribute name="outputclass" type="xs:string" />
    <xs:attributeGroup ref="domains-att"/>
    <xs:attributeGroup ref="topicref-atts" />
    <xs:attributeGroup ref="select-atts" />
    <xs:attributeGroup ref="localization-atts"/>
    <xs:attribute ref="ditaarch:DITAArchVersion"/>
    <xs:attributeGroup ref="global-atts" />
   </xs:attributeGroup>

  <xs:element name="navref">
    <xs:annotation>
      <xs:documentation>
        The &lt;<keyword>navref</keyword>&gt; element references a map file
        from within a map file.  The reference is resolved at runtime for Eclipse
        navigation, typically to pull together the navigation for multiple components
        into a product navigation. <ph conref="commonLRdefs.xml#commonLRdefs/only4eclipse"></ph>
      </xs:documentation>
    </xs:annotation>
    <xs:complexType>
      <xs:complexContent>
        <xs:extension base="navref.class">
          <xs:attribute ref="class" default="- map/navref " />
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="navref.class">
    <xs:attributeGroup ref="navref.attributes"/>    
  </xs:complexType>
   
   <xs:attributeGroup name="navref.attributes">
     <xs:attributeGroup ref="univ-atts"/>
    <xs:attribute name="outputclass" type="xs:string" />
    <xs:attribute name="mapref" type="xs:string"/>
    <xs:attribute name="keyref" type="xs:string"/>
    <xs:attributeGroup ref="global-atts" />
   </xs:attributeGroup>

  <xs:element name="topicref">
    <xs:annotation>
      <xs:documentation>
        The &lt;<keyword>topicref</keyword>&gt; element designates a topic
        (such as a concept, task, or reference) as a link in a DITA map. A &lt;<keyword>topicref</keyword>&gt;
        can contain other&lt;<keyword>topicref</keyword>&gt; elements, allowing you to
        express navigation or table-of-contents hierarchies, as well as implying relationships
        between the containing &lt;<keyword>topicref</keyword>&gt; and its children.
        You can set the collection-type of a container &lt;<keyword>topicref</keyword>&gt;
        to determine how its children are related to each other. Relationships end
        up expressed as links in the output (with each participant in a relationship
        having links to the other participants). 
      </xs:documentation>
    </xs:annotation>
    <xs:complexType>
      <xs:complexContent>
        <xs:extension base="topicref.class">
          <xs:attribute ref="class" default="- map/topicref " />
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="topicref.class">
    <xs:sequence>
      <xs:group ref="topicref.content"/>
    </xs:sequence>
    <xs:attributeGroup ref="topicref.attributes"/>
  </xs:complexType>
   
   <xs:group name="topicref.content">
     <xs:sequence>
       <xs:sequence>
      <xs:group ref="topicmeta" minOccurs="0"/>
      <xs:choice minOccurs="0" maxOccurs="unbounded">
        <xs:group ref="navref" />
        <xs:group ref="anchor" />
        <xs:group ref="topicref" />
        <xs:group ref="data.elements.incl" />
      </xs:choice>
    </xs:sequence>
     </xs:sequence>
   </xs:group>
   
   <xs:attributeGroup name="topicref.attributes">
    <xs:attribute name="navtitle" type="xs:string"/>
    <xs:attribute name="href" type="xs:string"/>
    <xs:attribute name="keys" type="xs:string"/>
    <xs:attribute name="keyref" type="xs:string"/>
    <xs:attribute name="query" type="xs:string"/>
    <xs:attribute name="copy-to" type="xs:string"/>
    <xs:attributeGroup ref="topicref-atts" />
    <xs:attributeGroup ref="univ-atts" />
    <xs:attribute name="outputclass" type="xs:string"/>
    <xs:attributeGroup ref="global-atts" />
   </xs:attributeGroup>

  <xs:element name="reltable">
    <xs:annotation>
      <xs:documentation>
        The relationship table (&lt;<keyword>reltable</keyword>&gt;) defines
        relationships between topics, based on the familiar table model of rows (&lt;<keyword>relrow</keyword>&gt;),
        columns (&lt;<keyword>relheader</keyword>&gt;), and cells (&lt;<keyword>relcell</keyword>>).
        The &lt;<keyword>relcell</keyword>&gt; elements can contain &lt;<keyword>topicref</keyword>&gt;
        elements, which are then related to other &lt;<keyword>topicref</keyword>&gt;
        elements in the same row (although not necessarily in the same cell). By default,
        the contents of a &lt;<keyword>reltable</keyword>&gt; element are not output
        for navigation or TOC purposes, and are used only to define relationships
        that can be expressed as topic-to-topic links.
      </xs:documentation>
    </xs:annotation>
    <xs:complexType>
      <xs:complexContent>
        <xs:extension base="reltable.class">
          <xs:attribute ref="class" default="- map/reltable " />
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="reltable.class">
     <xs:sequence>
       <xs:group ref="reltable.content"/>
     </xs:sequence>
     <xs:attributeGroup ref="reltable.attributes"/>
  </xs:complexType>
   
   <xs:group name="reltable.content">
     <xs:sequence>
       <xs:sequence>
      <xs:group ref="topicmeta" minOccurs="0" />
      <xs:group ref="relheader" minOccurs="0" />
      <xs:group ref="relrow" maxOccurs="unbounded" />
    </xs:sequence>
     </xs:sequence>
   </xs:group>
   
   <xs:attributeGroup name="reltable.attributes">
     <xs:attribute name="title" type="xs:string" />
       <xs:attributeGroup ref="topicref-atts-no-toc" />
       <xs:attributeGroup ref="univ-atts" />
       <xs:attribute name="outputclass" type="xs:string"/>
       <xs:attributeGroup ref="global-atts" />
   </xs:attributeGroup>

  <xs:element name="relheader">
    <xs:annotation>
      <xs:documentation>
        The &lt;<keyword>relheader</keyword>&gt; element is a row of column
        definitions (&lt;<keyword>relcolspec</keyword>&gt; elements) in a relationship
        table. Each table can have only one set of column definitions.
      </xs:documentation>
    </xs:annotation>
    <xs:complexType>
      <xs:complexContent>
        <xs:extension base="relheader.class">
          <xs:attribute ref="class" default="- map/relheader " />
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="relheader.class">
    <xs:sequence>
      <xs:group ref="relheader.content"/>
    </xs:sequence>
    <xs:attributeGroup ref="relheader.attributes"/>
  </xs:complexType>
   
   <xs:group name="relheader.content">
     <xs:sequence>
       <xs:sequence maxOccurs="unbounded">
        <xs:group ref="relcolspec"  />
    </xs:sequence>
     </xs:sequence>
   </xs:group>
   
   <xs:attributeGroup name="relheader.attributes">
     <xs:attributeGroup ref="univ-atts" />
    <xs:attributeGroup ref="global-atts" />
   </xs:attributeGroup>

  <xs:element name="relcolspec">
    <xs:annotation>
      <xs:documentation>
        A column definition in the relationship table. You can use &lt;<keyword>relcolspec</keyword>&gt;
        column definitions to set defaults for the attributes of &lt;<keyword>topicref</keyword>&gt;
        elements in the column. For example, you can set type="concept" to treat all
        untyped &lt;<keyword>topicref</keyword>&gt; elements in the column as concepts.
      </xs:documentation>
    </xs:annotation>
    <xs:complexType>
      <xs:complexContent>
        <xs:extension base="relcolspec.class">
          <xs:attribute ref="class" default="- map/relcolspec " />
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
   <!-- <!ELEMENT relcolspec ((%title;)?, (%topicmeta;)?, (%topicref)*)>  #12048 -->
  <xs:complexType name="relcolspec.class">
      <xs:sequence>
        <xs:group ref="relcolspec.content"/>
      </xs:sequence>
      <xs:attributeGroup ref="relcolspec.attributes"/>
  </xs:complexType>
   
   <xs:group name="relcolspec.content">
     <xs:sequence>
       <xs:sequence>
        <xs:group ref="title"     minOccurs="0"/>
        <xs:group ref="topicmeta" minOccurs="0"/>
        <xs:group ref="topicref"  minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
     </xs:sequence>
   </xs:group>
   
   <xs:attributeGroup name="relcolspec.attributes">
     <xs:attributeGroup ref="univ-atts" />
    <xs:attributeGroup ref="topicref-atts" />
    <xs:attribute name="outputclass" type="xs:string"/>
    <xs:attributeGroup ref="global-atts" />
   </xs:attributeGroup>

  <xs:element name="relrow">
    <xs:annotation>
      <xs:documentation>
        A &lt;<keyword>relrow</keyword>&gt; is a row in the relationship table.
        This creates a relationship between the cells in the row, which will end up
        expressed as links among the &lt;<keyword>topicref</keyword>&gt; elements in
        the cells.
      </xs:documentation>
    </xs:annotation>
    <xs:complexType>
      <xs:complexContent>
        <xs:extension base="relrow.class">
          <xs:attribute ref="class" default="- map/relrow " />
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="relrow.class">
    <xs:sequence>
      <xs:group ref="relrow.content"/>
    </xs:sequence>
    <xs:attributeGroup ref="relrow.attributes"/>
  </xs:complexType>
   
   <xs:group name="relrow.content">
     <xs:sequence>
       <xs:sequence minOccurs="0" maxOccurs="unbounded">
        <xs:group ref="relcell"  />
    </xs:sequence>
     </xs:sequence>
   </xs:group>
   
   <xs:attributeGroup name="relrow.attributes">
     <xs:attributeGroup ref="univ-atts" />
    <xs:attribute name="outputclass" type="xs:string"/>
    <xs:attributeGroup ref="global-atts" />
   </xs:attributeGroup>

  <xs:element name="relcell">
    <xs:annotation>
      <xs:documentation>
        A &lt;<keyword>relcell</keyword>&gt; element is a cell in the relationship
        table. The &lt;<keyword>topicref</keyword>&gt; elements it contains will be related
        to topicrefs in other cells of the same row. By default, topicrefs in the
        same cell are not related to each other, unless you change the relcell's collection-type
        attribute to indicate that they are related.
      </xs:documentation>
    </xs:annotation>
    <xs:complexType>
      <xs:complexContent>
        <xs:extension base="relcell.class">
          <xs:attribute ref="class" default="- map/relcell " />
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="relcell.class">
    <xs:sequence>
      <xs:group ref="relcell.content"/>
    </xs:sequence>
    <xs:attributeGroup ref="relcell.attributes"/>
  </xs:complexType>
   
   <xs:group name="relcell.content">
     <xs:sequence>
       <xs:choice minOccurs="0" maxOccurs="unbounded">
        <xs:group ref="topicref"  />
        <xs:group ref="data.elements.incl"  />
    </xs:choice>
     </xs:sequence>
   </xs:group>
   
   <xs:attributeGroup name="relcell.attributes">
     <xs:attributeGroup ref="univ-atts" />
    <xs:attributeGroup ref="topicref-atts" />
    <xs:attribute name="outputclass" type="xs:string"/>
    <xs:attributeGroup ref="global-atts" />
   </xs:attributeGroup>


  <xs:element name="anchor">
    <xs:annotation>
      <xs:documentation>
        The &lt;<keyword>anchor</keyword>&gt; element is used for runtime
        integration of navigation. It provides an integration point that another map
        can point to in order to insert its navigation into the current navigation
        tree. It is currently supported by Eclipse output only.
      </xs:documentation>
    </xs:annotation>
    <xs:complexType>
      <xs:complexContent>
        <xs:extension base="anchor.class">
          <xs:attribute ref="class" default="- map/anchor " />
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="anchor.class">
    <xs:attributeGroup ref="anchor.attributes"/>
  </xs:complexType>
   
   <xs:attributeGroup name="anchor.attributes">
     <xs:attribute name="id" type="xs:ID" use="required"/>
    <xs:attribute name="outputclass" type="xs:string"/>
    <xs:attributeGroup ref="conref-atts" />
    <xs:attributeGroup ref="localization-atts"/>
    <xs:attributeGroup ref="select-atts" />
    <xs:attributeGroup ref="global-atts" />
   </xs:attributeGroup>

  <xs:element name="topicmeta">
    <xs:annotation>
      <xs:documentation>
        The &lt;<keyword>topicmeta</keyword>&gt; element defines the metadata
        that applies to a topic and the topic's children. When creating links, it
        can also be used to override the title and short description of the topic.
        In addition, it can insert index entries through the &lt;<keyword>keywords</keyword>&gt;
        element.
      </xs:documentation>
    </xs:annotation>
    <xs:complexType>
      <xs:complexContent>
        <xs:extension base="topicmeta.class">
          <xs:attribute ref="class" default="- map/topicmeta " />
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="topicmeta.class" >
    <xs:sequence>
      <xs:group ref="topicmeta.content"/>
    </xs:sequence>
    <xs:attributeGroup ref="topicmeta.attributes"/>
  </xs:complexType>
   
   <xs:group name="topicmeta.content">
     <xs:sequence>
       <xs:sequence>
      <xs:group ref="navtitle" minOccurs="0"/>
      <xs:group ref="linktext" minOccurs="0"/>
      <xs:group ref="searchtitle" minOccurs="0"/>
      <xs:group ref="shortdesc" minOccurs="0"/>
      <xs:group ref="author" minOccurs="0" maxOccurs="unbounded"/>
      <xs:group ref="source" minOccurs="0"/>
      <xs:group ref="publisher" minOccurs="0"/>
      <xs:group ref="copyright" minOccurs="0" maxOccurs="unbounded"/>
      <xs:group ref="critdates" minOccurs="0"/>
      <xs:group ref="permissions" minOccurs="0"/>
      <xs:group ref="metadata" minOccurs="0" maxOccurs="unbounded"/>
      <xs:group ref="audience" minOccurs="0" maxOccurs="unbounded"/>
      <xs:group ref="category" minOccurs="0" maxOccurs="unbounded"/>
      <xs:group ref="keywords" minOccurs="0" maxOccurs="unbounded"/>
      <xs:group ref="prodinfo" minOccurs="0" maxOccurs="unbounded"/>
      <xs:group ref="othermeta" minOccurs="0" maxOccurs="unbounded"/>
      <xs:group ref="resourceid" minOccurs="0" maxOccurs="unbounded"/>
      <xs:choice minOccurs="0" maxOccurs="unbounded">
        <xs:group ref="data.elements.incl" />
        <xs:group ref="foreign.unknown.incl" />
      </xs:choice>
    </xs:sequence>
     </xs:sequence>
   </xs:group>
   
   <xs:attributeGroup name="topicmeta.attributes">
     <xs:attribute name="lockmeta" type="yesno-att.class"/>
    <xs:attributeGroup ref="univ-atts"/>
    <xs:attributeGroup ref="global-atts" />
   </xs:attributeGroup>

  <xs:element name="linktext">
    <xs:annotation>
      <xs:documentation>
        The &lt;<keyword>linktext</keyword>&gt; element provides the literal
        label or line of text for a link. In most cases, the text of a link can be
        resolved during processing by cross reference with the target resource. Use
        the &lt;<keyword>linktext</keyword>&gt; element only when the target cannot be
        reached, such as when it is a peer or external link.
      </xs:documentation>
    </xs:annotation>
    <xs:complexType mixed="true">
      <xs:complexContent>
        <xs:extension base="linktext.class">
          <xs:attribute ref="class" default="- map/linktext " />
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="linktext.class" mixed="true">
    <xs:sequence>
      <xs:group ref="linktext.content"/>
    </xs:sequence>
    <xs:attributeGroup ref="linktext.attributes"/>
  </xs:complexType >
   
   <xs:group name="linktext.content">
     <xs:sequence>
       <xs:choice minOccurs="0" maxOccurs="unbounded">
      <xs:group ref="words.cnt"/>
      <xs:group ref="ph"/>
    </xs:choice>
     </xs:sequence>
   </xs:group>
   
   <xs:attributeGroup name="linktext.attributes">
     <xs:attribute name="outputclass" type="xs:string"/>
    <xs:attributeGroup ref="univ-atts"/>
    <xs:attributeGroup ref="global-atts" />
   </xs:attributeGroup>

  <xs:element name="searchtitle">
    <xs:annotation>
      <xs:documentation>
        When your DITA topic is transformed to XHTML, the &lt;<keyword>searchtitle</keyword>&gt;
        element is used to create a title element at the top of the resulting HTML
        file. This title is normally used in search result summaries by some search
        engines, such as that in Eclipse (<xref format="html" href="http://eclipse.org"  scope="external">http://eclipse.org</xref>); if not set, the XHTML's
        title element defaults to the source topic's title content (which may not
        be as well optimized for search summaries)
      </xs:documentation>
    </xs:annotation>
    <xs:complexType mixed="true">
      <xs:complexContent>
        <xs:extension base="searchtitle.class">
          <xs:attribute ref="class" default="- map/searchtitle " />
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="searchtitle.class" mixed="true">
    <xs:sequence>
      <xs:group ref="searchtitle.content"/>
    </xs:sequence>
    <xs:attributeGroup ref="searchtitle.attributes"/>
  </xs:complexType >
   
   <xs:group name="searchtitle.content">
     <xs:sequence>
       <xs:sequence minOccurs="0" maxOccurs="unbounded">
      <xs:group ref="words.cnt"/>
    </xs:sequence>
     </xs:sequence>
   </xs:group>
   
   <xs:attributeGroup name="searchtitle.attributes">
     <xs:attribute name="outputclass" type="xs:string"/>
    <xs:attributeGroup ref="univ-atts"/>
    <xs:attributeGroup ref="global-atts" />
   </xs:attributeGroup>

<xs:element name="shortdesc">
    <xs:annotation>
      <xs:documentation>
        The short description (&lt;<keyword>shortdesc</keyword>&gt;) element
        occurs between the topic title and the topic body, as the initial paragraph-like
        content of a topic. The short description, which represents the purpose or
        theme of the topic, is also intended to be used as a link preview and for
        searching.
      </xs:documentation>
    </xs:annotation>
    <xs:complexType mixed="true">
      <xs:complexContent>
        <xs:extension base="shortdesc.class">
          <xs:attribute ref="class" default="- map/shortdesc " />
        </xs:extension>
      </xs:complexContent>
    </xs:complexType>
  </xs:element>
   
  <!--<xs:complexType name="shortdesc.class" mixed="true">
    <xs:sequence minOccurs="0" maxOccurs="unbounded">
      <xs:group ref="words.cnt"/>
    </xs:sequence>
    <xs:attributeGroup ref="global-atts" />
  </xs:complexType >-->
   
</xs:schema>