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<!-- DTD for XML Schemas: Part 1: Structures

     Public Identifier: "-//W3C//DTD XMLSCHEMA 200102//EN"

     Official Location: http://www.w3.org/2001/XMLSchema.dtd -->

<!-- $Id: XMLSchema.dtd,v 1.31 2001/10/24 15:50:16 ht Exp $ -->

<!-- Note this DTD is NOT normative, or even definitive. -->           <!--d-->

<!-- prose copy in the structures REC is the definitive version -->    <!--d-->

<!-- (which shouldn't differ from this one except for this -->         <!--d-->

<!-- comment and entity expansions, but just in case) -->              <!--d-->

<!-- With the exception of cases with multiple namespace

     prefixes for the XML Schema 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 XML Schema namespace is almost certainly not

     a valid schema. -->

<!-- The simpleType element and its constituent parts

     are defined in XML Schema: Part 2: Datatypes -->

<!ENTITY % xs-datatypes PUBLIC 'datatypes' 'datatypes.dtd' >

<!ENTITY % p 'xs:'> <!-- can be overriden 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 % complexType "%p;complexType">

<!ENTITY % complexContent "%p;complexContent">

<!ENTITY % simpleContent "%p;simpleContent">

<!ENTITY % extension "%p;extension">

<!ENTITY % element "%p;element">

<!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 % notation "%p;notation">

<!-- 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 schemas -->

<!ENTITY % schemaAttrs ''>

<!ENTITY % complexTypeAttrs ''>

<!ENTITY % complexContentAttrs ''>

<!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 % includeAttrs ''>

<!ENTITY % importAttrs ''>

<!ENTITY % redefineAttrs ''>

<!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 % mgs '%all; | %choice; | %sequence;'>

<!ENTITY % cs '%choice; | %sequence;'>

<!ENTITY % formValues '(qualified|unqualified)'>

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

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

<!-- This is used in part2 -->

<!ENTITY % restriction1 '((%mgs; | %group;)?)'>

%xs-datatypes;

<!-- the duplication below is to produce an unambiguous content model

     which allows annotation everywhere -->

<!ELEMENT %schema; ((%include; | %import; | %redefine; | %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'

   xml:lang             CDATA                  #IMPLIED

   %schemaAttrs;>

<!-- Note the xmlns declaration is NOT in the Schema for Schemas,

     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. -->

<!-- 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'

          %complexTypeAttrs;>

<!-- particleAndAttrs is shorthand for a root type -->

<!-- mixed is disallowed if simpleContent, overriden 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;>

<!-- 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;)?,

                     (%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

            %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 the ur-type, i.e. unconstrained -->

<!-- default and fixed are mutually exclusive -->

<!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;)*)>

<!ATTLIST %all;

          minOccurs   (1)                    #IMPLIED

          maxOccurs   (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 -->

<!-- Note that if order is 'all', group is not allowed inside.

     If order is 'all' THIS group must be alone (or referenced alone) at

     the top level of a content model -->

<!-- If order is 'all', minOccurs==maxOccurs==1 on element/any inside -->

<!-- Should allow minOccurs=0 inside order='all' . . . -->

<!ELEMENT %any; (%annotation;)?>

<!ATTLIST %any;

            namespace       CDATA                  '##any'

            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 -->

<!ELEMENT %anyAttribute; (%annotation;)?>

<!ATTLIST %anyAttribute;

            namespace       CDATA              '##any'

            processContents (skip|lax|strict)  'strict'

            id              ID                 #IMPLIED

            %anyAttributeAttrs;>

<!-- namespace is 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

          %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;       #REQUIRED

	  id       ID             #IMPLIED

	  %uniqueAttrs;>

<!ELEMENT %key;    ((%annotation;)?, %selector;, (%field;)+)>

<!ATTLIST %key;

          name     %NCName;       #REQUIRED

	  id       ID             #IMPLIED

	  %keyAttrs;>

<!ELEMENT %keyref; ((%annotation;)?, %selector;, (%field;)+)>

<!ATTLIST %keyref;

          name     %NCName;       #REQUIRED

	  refer    %QName;        #REQUIRED

	  id       ID             #IMPLIED

	  %keyrefAttrs;>

<!ELEMENT %selector; ((%annotation;)?)>

<!ATTLIST %selector;

          xpath %XPathExpr; #REQUIRED

          id    ID          #IMPLIED

          %selectorAttrs;>

<!ELEMENT %field; ((%annotation;)?)>

<!ATTLIST %field;

          xpath %XPathExpr; #REQUIRED

          id    ID          #IMPLIED

          %fieldAttrs;>

<!-- 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 %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' >