
<!-- DTD for XML Schema Definition Language Part 1: Structures
     Public Identifier: "-//W3C//DTD XSD 1.1//EN"
     Official Location: http://www.w3.org/2009/XMLSchema/XMLSchema.dtd -->
<!-- Id: structures.dtd,v 1.1 2003/08/28 13:30:52 ht Exp  -->
<!-- With the exception of cases with multiple namespace
     prefixes for the XSD namespace, any XML document which is
     not valid per this DTD given redefinitions in its internal subset of the
     'p' and 's' parameter entities below appropriate to its namespace
     declaration of the XSD namespace is almost certainly not
     a valid schema document. -->

<!-- See below (at the bottom of this document) for information about
      the revision and namespace-versioning policy governing this DTD. -->
<!-- The simpleType element and its constituent parts
     are defined in XML Schema Definition Language Part 2: Datatypes -->
<!ENTITY % xs-datatypes PUBLIC '-//W3C//DTD XSD 1.1 Datatypes//EN' 'datatypes.dtd' >

<!ENTITY % p 'xs:'> <!-- can be overridden in the internal subset of a
                         schema document to establish a different
                         namespace prefix -->
<!ENTITY % s ':xs'> <!-- if %p is defined (e.g. as foo:) then you must
                         also define %s as the suffix for the appropriate
                         namespace declaration (e.g. :foo) -->
<!ENTITY % nds 'xmlns%s;'>

<!-- Define all the element names, with optional prefix -->
<!ENTITY % schema "%p;schema">
<!ENTITY % defaultOpenContent "%p;defaultOpenContent">
<!ENTITY % complexType "%p;complexType">
<!ENTITY % complexContent "%p;complexContent">
<!ENTITY % openContent "%p;openContent">
<!ENTITY % simpleContent "%p;simpleContent">
<!ENTITY % extension "%p;extension">
<!ENTITY % element "%p;element">
<!ENTITY % alternative "%p;alternative">
<!ENTITY % unique "%p;unique">
<!ENTITY % key "%p;key">
<!ENTITY % keyref "%p;keyref">
<!ENTITY % selector "%p;selector">
<!ENTITY % field "%p;field">
<!ENTITY % group "%p;group">
<!ENTITY % all "%p;all">
<!ENTITY % choice "%p;choice">
<!ENTITY % sequence "%p;sequence">
<!ENTITY % any "%p;any">
<!ENTITY % anyAttribute "%p;anyAttribute">
<!ENTITY % attribute "%p;attribute">
<!ENTITY % attributeGroup "%p;attributeGroup">
<!ENTITY % include "%p;include">
<!ENTITY % import "%p;import">
<!ENTITY % redefine "%p;redefine">
<!ENTITY % override "%p;override">
<!ENTITY % notation "%p;notation">
<!ENTITY % assert   "%p;assert">


<!-- annotation elements -->
<!ENTITY % annotation "%p;annotation">
<!ENTITY % appinfo "%p;appinfo">
<!ENTITY % documentation "%p;documentation">

<!-- Customisation entities for the ATTLIST of each element type.
     Define one of these if your schema takes advantage of the
     anyAttribute='##other' in the
     schema for schema documents -->

<!ENTITY % schemaAttrs ''>
<!ENTITY % defaultOpenContentAttrs ''>
<!ENTITY % complexTypeAttrs ''>
<!ENTITY % complexContentAttrs ''>
<!ENTITY % openContentAttrs ''>
<!ENTITY % simpleContentAttrs ''>
<!ENTITY % extensionAttrs ''>
<!ENTITY % elementAttrs ''>
<!ENTITY % groupAttrs ''>
<!ENTITY % allAttrs ''>
<!ENTITY % choiceAttrs ''>
<!ENTITY % sequenceAttrs ''>
<!ENTITY % anyAttrs ''>
<!ENTITY % anyAttributeAttrs ''>
<!ENTITY % attributeAttrs ''>
<!ENTITY % attributeGroupAttrs ''>
<!ENTITY % uniqueAttrs ''>
<!ENTITY % keyAttrs ''>
<!ENTITY % keyrefAttrs ''>
<!ENTITY % selectorAttrs ''>
<!ENTITY % fieldAttrs ''>
<!ENTITY % assertAttrs ''>

<!ENTITY % includeAttrs ''>
<!ENTITY % importAttrs ''>
<!ENTITY % redefineAttrs ''>
<!ENTITY % overrideAttrs ''>
<!ENTITY % notationAttrs ''>
<!ENTITY % annotationAttrs ''>
<!ENTITY % appinfoAttrs ''>
<!ENTITY % documentationAttrs ''>

<!ENTITY % complexDerivationSet "CDATA">
      <!-- #all or space-separated list drawn from derivationChoice -->
<!ENTITY % blockSet "CDATA">
      <!-- #all or space-separated list drawn from
                      derivationChoice + 'substitution' -->

<!ENTITY % composition '%include; | %import; | %override; | %redefine;'>
<!ENTITY % mgs '%all; | %choice; | %sequence;'>
<!ENTITY % cs '%choice; | %sequence;'>
<!ENTITY % formValues '(qualified|unqualified)'>


<!ENTITY % attrDecls    '((%attribute;| %attributeGroup;)*,(%anyAttribute;)?)'>

<!ENTITY % assertions   '(%assert;)*'>

<!ENTITY % particleAndAttrs '(%openContent;?, (%mgs; | %group;)?,
                              %attrDecls;, %assertions;)'>

<!-- This is used in part2 -->
<!ENTITY % restriction1 '(%openContent;?, (%mgs; | %group;)?)'>

%xs-datatypes;

<!-- the duplication below is to produce an unambiguous content model
     which allows annotation everywhere -->
<!ELEMENT %schema; ((%composition; | %annotation;)*,
                    (%defaultOpenContent;, (%annotation;)*)?,
                    ((%simpleType; | %complexType;
                      | %element; | %attribute;
                      | %attributeGroup; | %group;
                      | %notation; ),
                     (%annotation;)*)* )>
<!ATTLIST %schema;
   targetNamespace      %URIref;               #IMPLIED
   version              CDATA                  #IMPLIED
   %nds;                %URIref;               #FIXED 'http://www.w3.org/2001/XMLSchema'
   xmlns                CDATA                  #IMPLIED
   finalDefault         %complexDerivationSet; ''
   blockDefault         %blockSet;             ''
   id                   ID                     #IMPLIED
   elementFormDefault   %formValues;           'unqualified'
   attributeFormDefault %formValues;           'unqualified'
   defaultAttributes    CDATA                  #IMPLIED
   xpathDefaultNamespace    CDATA       '##local'
   xml:lang             CDATA                  #IMPLIED
   %schemaAttrs;>
<!-- Note the xmlns declaration is NOT in the
     schema for schema documents,
     because at the Infoset level where schemas operate,
     xmlns(:prefix) is NOT an attribute! -->
<!-- The declaration of xmlns is a convenience for schema authors -->
 
<!-- The id attribute here and below is for use in external references
     from non-schemas using simple fragment identifiers.
     It is NOT used for schema-to-schema reference, internal or
     external. -->

<!ELEMENT %defaultOpenContent; ((%annotation;)?, %any;)>
<!ATTLIST %defaultOpenContent;
          appliesToEmpty  (true|false)           'false'
          mode            (interleave|suffix)    'interleave'
          id              ID                     #IMPLIED
          %defaultOpenContentAttrs;>

<!-- a type is a named content type specification which allows attribute
     declarations-->
<!-- -->

<!ELEMENT %complexType; ((%annotation;)?,
                         (%simpleContent;|%complexContent;|
                          %particleAndAttrs;))>

<!ATTLIST %complexType;
          name                    %NCName;                 #IMPLIED
          id                      ID                       #IMPLIED
          abstract                %boolean;                #IMPLIED
          final                   %complexDerivationSet;   #IMPLIED
          block                   %complexDerivationSet;   #IMPLIED
          mixed                   (true|false)             'false'
          defaultAttributesApply  %boolean;                'true'
          %complexTypeAttrs;>

<!-- particleAndAttrs is shorthand for a root type -->
<!-- mixed is disallowed if simpleContent, overridden if complexContent has one too. -->

<!-- If anyAttribute appears in one or more referenced attributeGroups
     and/or explicitly, the intersection of the permissions is used -->

<!ELEMENT %complexContent; ((%annotation;)?, (%restriction;|%extension;))>
<!ATTLIST %complexContent;
          mixed (true|false) #IMPLIED
          id    ID           #IMPLIED
          %complexContentAttrs;>

<!ELEMENT %openContent; ((%annotation;)?, (%any;)?)>
<!ATTLIST %openContent;
          mode            (none|interleave|suffix)  'interleave'
          id              ID                        #IMPLIED
          %openContentAttrs;>

<!-- restriction should use the branch defined above, not the simple
     one from part2; extension should use the full model  -->

<!ELEMENT %simpleContent; ((%annotation;)?, (%restriction;|%extension;))>
<!ATTLIST %simpleContent;
          id    ID           #IMPLIED
          %simpleContentAttrs;>

<!-- restriction should use the simple branch from part2, not the 
     one defined above; extension should have no particle  -->

<!ELEMENT %extension; ((%annotation;)?, (%particleAndAttrs;))>
<!ATTLIST %extension;
          base  %QName;               #REQUIRED
          id    ID                    #IMPLIED
          
          %extensionAttrs;>

<!-- an element is declared by either:
 a name and a type (either nested or referenced via the type attribute)
 or a ref to an existing element declaration -->

<!ELEMENT %element; ((%annotation;)?, (%complexType;| %simpleType;)?,
                     (%alternative;)*,
                     (%unique; | %key; | %keyref;)*)>
<!-- simpleType or complexType only if no type|ref attribute -->
<!-- ref not allowed at top level -->
<!ATTLIST %element;
            name               %NCName;               #IMPLIED
            id                 ID                     #IMPLIED
            ref                %QName;                #IMPLIED
            type               %QName;                #IMPLIED
            minOccurs          %nonNegativeInteger;   #IMPLIED
            maxOccurs          CDATA                  #IMPLIED
            nillable           %boolean;              #IMPLIED
            substitutionGroup  %QName;                #IMPLIED
            abstract           %boolean;              #IMPLIED
            final              %complexDerivationSet; #IMPLIED
            block              %blockSet;             #IMPLIED
            default            CDATA                  #IMPLIED
            fixed              CDATA                  #IMPLIED
            form               %formValues;           #IMPLIED
            targetNamespace    %URIref;               #IMPLIED
            %elementAttrs;>
<!-- type and ref are mutually exclusive.
     name and ref are mutually exclusive, one is required -->
<!-- In the absence of type AND ref, type defaults to type of
     substitutionGroup, if any, else xs:anyType, i.e. unconstrained -->
<!-- default and fixed are mutually exclusive -->

<!ELEMENT %alternative; ((%annotation;)?, 
            (%simpleType; | %complexType;)?) >
<!ATTLIST %alternative; 
            test                     CDATA     #IMPLIED
            type                     %QName;   #IMPLIED
            xpathDefaultNamespace    CDATA     #IMPLIED
            id                       ID        #IMPLIED >


<!ELEMENT %group; ((%annotation;)?,(%mgs;)?)>
<!ATTLIST %group; 
          name        %NCName;               #IMPLIED
          ref         %QName;                #IMPLIED
          minOccurs   %nonNegativeInteger;   #IMPLIED
          maxOccurs   CDATA                  #IMPLIED
          id          ID                     #IMPLIED
          %groupAttrs;>

<!ELEMENT %all; ((%annotation;)?, (%element;| %group;| %any;)*)>
<!ATTLIST %all;
          minOccurs   (0 | 1)                #IMPLIED
          maxOccurs   (0 | 1)                #IMPLIED
          id          ID                     #IMPLIED
          %allAttrs;>

<!ELEMENT %choice; ((%annotation;)?, (%element;| %group;| %cs; | %any;)*)>
<!ATTLIST %choice;
          minOccurs   %nonNegativeInteger;   #IMPLIED
          maxOccurs   CDATA                  #IMPLIED
          id          ID                     #IMPLIED
          %choiceAttrs;>

<!ELEMENT %sequence; ((%annotation;)?, (%element;| %group;| %cs; | %any;)*)>
<!ATTLIST %sequence;
          minOccurs   %nonNegativeInteger;   #IMPLIED
          maxOccurs   CDATA                  #IMPLIED
          id          ID                     #IMPLIED
          %sequenceAttrs;>

<!-- an anonymous grouping in a model, or
     a top-level named group definition, or a reference to same -->


<!ELEMENT %any; (%annotation;)?>
<!ATTLIST %any;
            namespace       CDATA                  #IMPLIED
            notNamespace    CDATA                  #IMPLIED
            notQName        CDATA                  ''
            processContents (skip|lax|strict)      'strict'
            minOccurs       %nonNegativeInteger;   '1'
            maxOccurs       CDATA                  '1'
            id              ID                     #IMPLIED
            %anyAttrs;>

<!-- namespace is interpreted as follows:
                  ##any      - - any non-conflicting WFXML at all

                  ##other    - - any non-conflicting WFXML from namespace other
                                  than targetNamespace

                  ##local    - - any unqualified non-conflicting WFXML/attribute
                  one or     - - any non-conflicting WFXML from
                  more URI        the listed namespaces
                  references

                  ##targetNamespace ##local may appear in the above list,
                    with the obvious meaning -->

<!-- notNamespace is interpreted as follows:
                  ##local    - - any unqualified non-conflicting WFXML/attribute
                  one or     - - any non-conflicting WFXML from
                  more URI        the listed namespaces
                  references

                  ##targetNamespace ##local may appear in the above list,
                    with the obvious meaning -->

<!ELEMENT %anyAttribute; (%annotation;)?>
<!ATTLIST %anyAttribute;
            namespace       CDATA              #IMPLIED
            notNamespace    CDATA              #IMPLIED
            notQName        CDATA              ''
            processContents (skip|lax|strict)  'strict'
            id              ID                 #IMPLIED
            %anyAttributeAttrs;>
<!-- namespace and notNamespace are interpreted as for 'any' above -->

<!-- simpleType only if no type|ref attribute -->
<!-- ref not allowed at top level, name iff at top level -->
<!ELEMENT %attribute; ((%annotation;)?, (%simpleType;)?)>
<!ATTLIST %attribute;
          name              %NCName;      #IMPLIED
          id                ID            #IMPLIED
          ref               %QName;       #IMPLIED
          type              %QName;       #IMPLIED
          use               (prohibited|optional|required) #IMPLIED
          default           CDATA         #IMPLIED
          fixed             CDATA         #IMPLIED
          form              %formValues;  #IMPLIED
          targetNamespace   %URIref;      #IMPLIED
          inheritable       %boolean;      #IMPLIED
          %attributeAttrs;>
<!-- type and ref are mutually exclusive.
     name and ref are mutually exclusive, one is required -->
<!-- default for use is optional when nested, none otherwise -->
<!-- default and fixed are mutually exclusive -->
<!-- type attr and simpleType content are mutually exclusive -->

<!-- an attributeGroup is a named collection of attribute decls, or a
     reference thereto -->
<!ELEMENT %attributeGroup; ((%annotation;)?,
                       (%attribute; | %attributeGroup;)*,
                       (%anyAttribute;)?) >
<!ATTLIST %attributeGroup;
                 name       %NCName;       #IMPLIED
                 id         ID             #IMPLIED
                 ref        %QName;        #IMPLIED
                 %attributeGroupAttrs;>

<!-- ref iff no content, no name.  ref iff not top level -->

<!-- better reference mechanisms -->
<!ELEMENT %unique; ((%annotation;)?, %selector;, (%field;)+)>
<!ATTLIST %unique;
          name                     %NCName;       #IMPLIED
          ref                      %QName;        #IMPLIED
          id                       ID             #IMPLIED
          %uniqueAttrs;>

<!ELEMENT %key;    ((%annotation;)?, %selector;, (%field;)+)>
<!ATTLIST %key;
          name                     %NCName;       #IMPLIED
          ref                      %QName;        #IMPLIED
          id                       ID             #IMPLIED
          %keyAttrs;>

<!ELEMENT %keyref; ((%annotation;)?, %selector;, (%field;)+)>
<!ATTLIST %keyref;
          name                     %NCName;       #IMPLIED
          ref                      %QName;        #IMPLIED
          refer                    %QName;        #IMPLIED
          id                       ID             #IMPLIED
          %keyrefAttrs;>

<!ELEMENT %selector; ((%annotation;)?)>
<!ATTLIST %selector;
          xpath                    %XPathExpr; #REQUIRED
          xpathDefaultNamespace    CDATA       #IMPLIED
          id                       ID          #IMPLIED
          %selectorAttrs;>
<!ELEMENT %field; ((%annotation;)?)>
<!ATTLIST %field;
          xpath                    %XPathExpr; #REQUIRED
          xpathDefaultNamespace    CDATA       #IMPLIED
          id                       ID          #IMPLIED
          %fieldAttrs;>

<!-- co-constraint assertions -->
<!ELEMENT %assert; ((%annotation;)?)>
<!ATTLIST %assert;
          test                     %XPathExpr; #REQUIRED
          id                       ID          #IMPLIED
          xpathDefaultNamespace    CDATA       #IMPLIED
          %assertAttrs;>


<!-- Schema combination mechanisms -->
<!ELEMENT %include; (%annotation;)?>
<!ATTLIST %include;
          schemaLocation %URIref; #REQUIRED
          id             ID       #IMPLIED
          %includeAttrs;>

<!ELEMENT %import; (%annotation;)?>
<!ATTLIST %import;
          namespace      %URIref; #IMPLIED
          schemaLocation %URIref; #IMPLIED
          id             ID       #IMPLIED
          %importAttrs;>

<!ELEMENT %redefine; (%annotation; | %simpleType; | %complexType; |
                      %attributeGroup; | %group;)*>
<!ATTLIST %redefine;
          schemaLocation %URIref; #REQUIRED
          id             ID       #IMPLIED
          %redefineAttrs;>

<!ELEMENT %override; ((%annotation;)?,
                      ((%simpleType; | %complexType; | %group; | %attributeGroup;) |
                       %element; | %attribute; | %notation;)*)>
<!ATTLIST %override;
          schemaLocation %URIref; #REQUIRED
          id             ID       #IMPLIED
          %overrideAttrs;>

<!ELEMENT %notation; (%annotation;)?>
<!ATTLIST %notation;
	  name        %NCName;    #REQUIRED
	  id          ID          #IMPLIED
	  public      CDATA       #REQUIRED
	  system      %URIref;    #IMPLIED
	  %notationAttrs;>

<!-- Annotation is either application information or documentation -->
<!-- By having these here they are available for datatypes as well
     as all the structures elements -->

<!ELEMENT %annotation; (%appinfo; | %documentation;)*>
<!ATTLIST %annotation; %annotationAttrs;>

<!-- User must define annotation elements in internal subset for this
     to work -->
<!ELEMENT %appinfo; ANY>   <!-- too restrictive -->
<!ATTLIST %appinfo;
          source     %URIref;      #IMPLIED
          id         ID         #IMPLIED
          %appinfoAttrs;>
<!ELEMENT %documentation; ANY>   <!-- too restrictive -->
<!ATTLIST %documentation;
          source     %URIref;   #IMPLIED
          id         ID         #IMPLIED
          xml:lang   CDATA      #IMPLIED
          %documentationAttrs;>

<!NOTATION XMLSchemaStructures PUBLIC
           'structures' 'http://www.w3.org/2001/XMLSchema.xsd' >
<!NOTATION XML PUBLIC
           'REC-xml-1998-0210' 'http://www.w3.org/TR/1998/REC-xml-19980210' >

<!-- 
      In keeping with the XML Schema WG's standard versioning policy, 
      this DTD will persist at the URI
      http://www.w3.org/2012/04/XMLSchema.dtd.

      At the date of issue it can also be found at the URI
      http://www.w3.org/2009/XMLSchema/XMLSchema.dtd.

      The schema document at that URI may however change in the future, 
      in order to remain compatible with the latest version of XSD 
      and its namespace.  In other words, if XSD or the XML Schema 
      namespace change, the version of this document at 
      http://www.w3.org/2009/XMLSchema/XMLSchema.dtd will change accordingly; 
      the version at http://www.w3.org/2012/04/XMLSchema.dtd 
      will not change.

      Previous dated (and unchanging) versions of this DTD include:

       http://www.w3.org/2012/01/XMLSchema.dtd
          (XSD 1.1 Proposed Recommendation)


        http://www.w3.org/2011/07/XMLSchema.dtd
          (XSD 1.1 Candidate Recommendation)

        http://www.w3.org/2009/04/XMLSchema.dtd 
          (XSD 1.1 Candidate Recommendation)

        http://www.w3.org/2004/10/XMLSchema.dtd
          (XSD 1.0 Recommendation, Second Edition)

        http://www.w3.org/2001/05/XMLSchema.dtd
          (XSD 1.0 Recommendation, First Edition)

-->