XML Topic Map (XTM) DTD, Version 1.0

Source: http://www.isotopicmaps.org/sam/sam-xtm/#sect-dtd, extracted 2003-02-07. From the editors' draft 2002-07-22.

---

  <!-- ............................................................. -->
  <!-- XML Topic Map DTD  .......................................... -->
  <!-- file: xtm1.dtd
  -->
  <!-- XML Topic Map (XTM) DTD, Version 1.0

       This is XTM, an XML interchange syntax for ISO 13250 Topic Maps.

       Use this URI to identify the default XTM namespace:

           "http://www.topicmaps.org/xtm/1.0/"

       Used to identify the XLink namespace:

           "http://www.w3.org/1999/xlink"
  -->

  <!-- topicMap: Topic Map document element ........................ -->

  <!ELEMENT topicMap
     ( topic | association | mergeMap )*
  >
  <!ATTLIST topicMap
     id              ID        #IMPLIED
     xmlns           CDATA     #FIXED 'http://www.topicmaps.org/xtm/1.0/'
     xmlns:xlink     CDATA     #FIXED 'http://www.w3.org/1999/xlink'
     xml:base        CDATA     #IMPLIED
  >

  <!-- topic: Topic element ........................................ -->

  <!ELEMENT topic
     ( instanceOf*, subjectIdentity?, ( baseName | occurrence )* )
  >
  <!ATTLIST topic
     id              ID        #REQUIRED
  >

  <!-- instanceOf: Points To a Topic representing a class .......... -->

  <!ELEMENT instanceOf  ( topicRef | subjectIndicatorRef ) >
  <!ATTLIST instanceOf
     id              ID        #IMPLIED
  >

  <!-- subjectIdentity: Subject reified by Topic ................... -->

  <!ELEMENT subjectIdentity
     ( resourceRef?, ( topicRef | subjectIndicatorRef )* )
  >
  <!ATTLIST subjectIdentity
     id              ID        #IMPLIED
  >

  <!-- topicRef: Reference to a Topic element ...................... -->

  <!ELEMENT topicRef  EMPTY >
  <!ATTLIST topicRef
     id              ID        #IMPLIED
     xlink:type      NMTOKEN   #FIXED 'simple'
     xlink:href      CDATA     #REQUIRED
  >

  <!-- subjectIndicatorRef: Reference to a Subject Indicator ....... -->

  <!ELEMENT subjectIndicatorRef  EMPTY >
  <!ATTLIST subjectIndicatorRef
     id              ID        #IMPLIED
     xlink:type      NMTOKEN   #FIXED 'simple'
     xlink:href      CDATA     #REQUIRED
  >

  <!-- baseName: Base Name of a Topic .............................. -->

  <!ELEMENT baseName  ( scope?, baseNameString, variant* ) >
  <!ATTLIST baseName
     id              ID        #IMPLIED
  >

  <!-- baseNameString: Base Name String container .................. -->

  <!ELEMENT baseNameString  ( #PCDATA ) >
  <!ATTLIST baseNameString
     id              ID        #IMPLIED
  >

  <!-- variant: Alternate forms of Base Name ....................... -->

  <!ELEMENT variant  ( parameters, variantName?, variant* ) >
  <!ATTLIST variant
     id              ID        #IMPLIED
  >

  <!-- variantName: Container for Variant Name ..................... -->

  <!ELEMENT variantName  ( resourceRef | resourceData ) >
  <!ATTLIST variantName
     id              ID        #IMPLIED
  >

  <!-- parameters: Processing context for Variant .................. -->

  <!ELEMENT parameters  ( topicRef | subjectIndicatorRef )+ >
  <!ATTLIST parameters
     id              ID        #IMPLIED
  >

  <!-- occurrence: Resources regarded as an Occurrence ............. -->

  <!ELEMENT occurrence
     ( instanceOf?, scope?, ( resourceRef | resourceData ) )
  >
  <!ATTLIST occurrence
     id              ID        #IMPLIED
  >

  <!-- resourceRef: Reference to a Resource ........................ -->

  <!ELEMENT resourceRef  EMPTY >
  <!ATTLIST resourceRef
     id              ID        #IMPLIED
     xlink:type      NMTOKEN   #FIXED 'simple'
     xlink:href      CDATA     #REQUIRED
  >

  <!-- resourceData: Container for Resource Data ................... -->

  <!ELEMENT resourceData  ( #PCDATA ) >
  <!ATTLIST resourceData
     id              ID        #IMPLIED
  >

  <!-- association: Topic Association  ............................. -->

  <!ELEMENT association
     ( instanceOf?, scope?, member+ )
  >
  <!ATTLIST association
     id              ID        #IMPLIED
  >

  <!-- member: Member in Topic Association ......................... -->

  <!ELEMENT member
     ( roleSpec?, ( topicRef | resourceRef | subjectIndicatorRef )* )
  >
  <!ATTLIST member
     id              ID        #IMPLIED
  >

  <!-- roleSpec: Points to a Topic serving as an Association Role .. -->

  <!ELEMENT roleSpec  ( topicRef | subjectIndicatorRef ) >
  <!ATTLIST roleSpec
     id              ID        #IMPLIED
  >

  <!-- scope: Reference to Topic(s) that comprise the Scope ........ -->

  <!ELEMENT scope  ( topicRef  | resourceRef | subjectIndicatorRef )+ >
  <!ATTLIST scope
     id              ID        #IMPLIED
  >

  <!-- mergeMap: Merge with another Topic Map ...................... -->

  <!ELEMENT mergeMap  ( topicRef | resourceRef | subjectIndicatorRef )* >
  <!ATTLIST mergeMap
     id              ID        #IMPLIED
     xlink:type      NMTOKEN   #FIXED 'simple'
     xlink:href      CDATA     #REQUIRED
  >

  <!-- end of XML Topic Map (XTM) 1.0 DTD -->