On Thu, 13 Apr 2006, Mike Taylor wrote:
>I can't find a ZeeRex 2.1 schema or DTD on the Web, corresponding to
>the one in Appendix A of the Z39.92 DSTU.  Do you have it?  Thanks.

Attached the DTD and auto-generated schema.

Rob



<!-- ZeeRex DTD, version 2.1/2005-08-04 -->
<!-- Maintainer: Robert Sanderson, [log in to unmask] -->

<!ELEMENT explain (serverInfo, databaseInfo?, metaInfo?, indexInfo?,
(recordInfo|schemaInfo)?, configInfo?)>
<!ATTLIST explain
                  id CDATA #IMPLIED>
		  
<!-- Server Info -->
	  
 <!ELEMENT serverInfo (host, port, database, authentication?)>
 <!ATTLIST serverInfo
                      protocol CDATA #IMPLIED
                      version CDATA #IMPLIED
                      transport CDATA #IMPLIED
                      method CDATA #IMPLIED>
		       
 <!ELEMENT host (#PCDATA)>
 <!ELEMENT port (#PCDATA)>
 <!ELEMENT database (#PCDATA)>
      
 <!ELEMENT authentication (open | (user?, group?, password?))>
 <!ATTLIST authentication
 		      type CDATA #IMPLIED
                      required (true|false) "true">
 <!ELEMENT open (#PCDATA)>
 <!ELEMENT user (#PCDATA)>
 <!ELEMENT group (#PCDATA)>
 <!ELEMENT password (#PCDATA)>
   
 <!-- Database Info -->
  
 <!ELEMENT databaseInfo (title*, description*, (extent | history | langUsage | restrictions)*, agents?, links?, implementation?)>

<!-- Note that title is used in more than just databaseInfo -->
<!ELEMENT title (#PCDATA)>
<!ATTLIST title
                primary (true|false) #IMPLIED
	        lang CDATA #IMPLIED>
				
<!ELEMENT description (#PCDATA)>
<!ATTLIST description
                primary (true|false) #IMPLIED
                lang CDATA #IMPLIED>

<!ELEMENT extent (#PCDATA)>
<!ATTLIST extent
                 numberOfRecords CDATA #IMPLIED                 
                 primary (true|false) #IMPLIED
                 lang CDATA #IMPLIED>
				  
<!ELEMENT history (#PCDATA)>
<!ATTLIST history
                 lastUpdate CDATA #IMPLIED
                 primary (true|false) #IMPLIED
                 lang CDATA #IMPLIED>

<!ELEMENT langUsage (#PCDATA)>
<!ATTLIST langUsage
                  codes CDATA #IMPLIED
                  primary (true|false) #IMPLIED
                  lang CDATA #IMPLIED>
							    
<!ELEMENT restrictions (#PCDATA)>
<!ATTLIST restrictions
                   primary (true|false) #IMPLIED
                   lang CDATA #IMPLIED>

<!ELEMENT agents (agent+)>
				      
<!ELEMENT agent (#PCDATA)>
<!ATTLIST agent
                   type CDATA #IMPLIED
                   identifier CDATA #IMPLIED>
 
<!ELEMENT implementation (agents?, title*)>
<!ATTLIST implementation
                identifier CDATA #IMPLIED
                version CDATA #IMPLIED>    
			       
<!ELEMENT links (link+)>
<!ELEMENT link (#PCDATA)>
<!ATTLIST link
              type CDATA #IMPLIED>
				      
 <!-- Meta Info -->
					      
<!ELEMENT metaInfo (dateModified, (aggregatedFrom, dateAggregated)?)>

<!ELEMENT dateModified (#PCDATA)>
<!ELEMENT aggregatedFrom (#PCDATA)>
<!ELEMENT dateAggregated (#PCDATA)>                                          


<!-- Index Info -->

<!ELEMENT indexInfo ((set | index | sortKeyword)+)>

<!ELEMENT set (title*)>
<!ATTLIST set
              name CDATA #REQUIRED
              identifier CDATA #REQUIRED>
				      
<!ELEMENT index (title*, map+, configInfo?)>
<!ATTLIST index
                id CDATA #IMPLIED
                search (true|false) #IMPLIED
                scan (true|false) #IMPLIED
                sort (true|false) #IMPLIED>
				
<!ELEMENT sortKeyword (#PCDATA)>
				
<!ELEMENT map ((attr+)|name)>
<!ATTLIST map
             primary (true|false) "false">
					      
<!ELEMENT name (#PCDATA)>
<!ATTLIST name
               set CDATA #IMPLIED>
							     
<!ELEMENT attr (#PCDATA)>
<!ATTLIST attr
               type CDATA #REQUIRED
               set CDATA #IMPLIED>
	       
	       
<!-- Record Info and Schema Info -->
	       
<!ELEMENT recordInfo (recordSyntax+)>
<!ELEMENT recordSyntax (elementSet+)>
<!ATTLIST recordSyntax
               name CDATA #IMPLIED
               identifier CDATA #IMPLIED>
							     
<!ELEMENT elementSet (title*)>
<!ATTLIST elementSet
               name CDATA #REQUIRED
               identifier CDATA #IMPLIED>
					      
<!ELEMENT schemaInfo (schema+)>
<!ELEMENT schema (title*)>
<!ATTLIST schema
               identifier CDATA #REQUIRED
               name CDATA #REQUIRED
               location CDATA #IMPLIED
               sort (true|false) "false"
               retrieve (true|false) "true">

<!-- Config Info -->

<!ELEMENT configInfo ((default|setting|supports)*)>
<!ELEMENT default (#PCDATA)>
<!ATTLIST default
                 type CDATA #REQUIRED>
<!ELEMENT setting (#PCDATA)>
<!ATTLIST setting
                 type CDATA #REQUIRED>
<!ELEMENT supports (#PCDATA)>
<!ATTLIST supports
                 type CDATA #REQUIRED>
						       




<xs:schema xmlns:xs='http://www.w3.org/2001/XMLSchema'>
 <xs:annotation>
  -- This schema was automatically generated by Syntext Dtd2Schema --
  -- conversion tool (from file: zeerex-2.1.dtd) --
  -- Copyright (C) 2002, 2003 Syntext Inc. See http://www.syntext.com for updates. --
 </xs:annotation>
 <xs:element name='agent'>
  <xs:complexType mixed='true'>
  <xs:attribute name='type'/>
  <xs:attribute name='identifier'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='agents'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='agent' maxOccurs='unbounded'/>
   </xs:sequence>
  </xs:complexType>
 </xs:element>
 <xs:element name='aggregatedFrom'>
  <xs:complexType mixed='true'>
  </xs:complexType>
 </xs:element>
 <xs:element name='attr'>
  <xs:complexType mixed='true'>
  <xs:attribute name='type' use='required'/>
  <xs:attribute name='set'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='authentication'>
  <xs:complexType>
   <xs:choice>
     <xs:element ref='open'/>
     <xs:sequence>
       <xs:element ref='user' minOccurs='0'/>
       <xs:element ref='group' minOccurs='0'/>
       <xs:element ref='password' minOccurs='0'/>
     </xs:sequence>
   </xs:choice>
  <xs:attribute name='type'/>
  <xs:attribute name='required' default='true'>
   <xs:simpleType>
    <xs:restriction base='xs:string'>
     <xs:enumeration value='true'/>
     <xs:enumeration value='false'/>
    </xs:restriction>
   </xs:simpleType>
  </xs:attribute>
  </xs:complexType>
 </xs:element>
 <xs:element name='configInfo'>
  <xs:complexType>
   <xs:sequence>
     <xs:choice minOccurs='0' maxOccurs='unbounded'>
       <xs:element ref='default'/>
       <xs:element ref='setting'/>
       <xs:element ref='supports'/>
     </xs:choice>
   </xs:sequence>
  </xs:complexType>
 </xs:element>
 <xs:element name='database'>
  <xs:complexType mixed='true'>
  </xs:complexType>
 </xs:element>
 <xs:element name='databaseInfo'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='title' minOccurs='0' maxOccurs='unbounded'/>
     <xs:element ref='description' minOccurs='0' maxOccurs='unbounded'/>
     <xs:choice minOccurs='0' maxOccurs='unbounded'>
       <xs:element ref='extent'/>
       <xs:element ref='history'/>
       <xs:element ref='langUsage'/>
       <xs:element ref='restrictions'/>
       <xs:element ref='agents'/>
       <xs:element ref='links'/>
       <xs:element ref='implementation'/>
     </xs:choice>
   </xs:sequence>
  </xs:complexType>
 </xs:element>
 <xs:element name='dateAggregated'>
  <xs:complexType mixed='true'>
  </xs:complexType>
 </xs:element>
 <xs:element name='dateModified'>
  <xs:complexType mixed='true'>
  </xs:complexType>
 </xs:element>
 <xs:element name='default'>
  <xs:complexType mixed='true'>
  <xs:attribute name='type' use='required'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='description'>
  <xs:complexType mixed='true'>
  <xs:attribute name='primary'>
   <xs:simpleType>
    <xs:restriction base='xs:string'>
     <xs:enumeration value='true'/>
     <xs:enumeration value='false'/>
    </xs:restriction>
   </xs:simpleType>
  </xs:attribute>
  <xs:attribute name='lang'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='elementSet'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='title' minOccurs='0' maxOccurs='unbounded'/>
   </xs:sequence>
  <xs:attribute name='name' use='required'/>
  <xs:attribute name='identifier'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='explain'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='serverInfo'/>
     <xs:element ref='databaseInfo' minOccurs='0'/>
     <xs:element ref='metaInfo' minOccurs='0'/>
     <xs:element ref='indexInfo' minOccurs='0'/>
     <xs:choice minOccurs='0'>
       <xs:element ref='recordInfo'/>
       <xs:element ref='schemaInfo'/>
     </xs:choice>
     <xs:element ref='configInfo' minOccurs='0'/>
   </xs:sequence>
  <xs:attribute name='id'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='extent'>
  <xs:complexType mixed='true'>
  <xs:attribute name='primary'>
   <xs:simpleType>
    <xs:restriction base='xs:string'>
     <xs:enumeration value='true'/>
     <xs:enumeration value='false'/>
    </xs:restriction>
   </xs:simpleType>
  </xs:attribute>
  <xs:attribute name='lang'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='group'>
  <xs:complexType mixed='true'>
  </xs:complexType>
 </xs:element>
 <xs:element name='history'>
  <xs:complexType mixed='true'>
  <xs:attribute name='primary'>
   <xs:simpleType>
    <xs:restriction base='xs:string'>
     <xs:enumeration value='true'/>
     <xs:enumeration value='false'/>
    </xs:restriction>
   </xs:simpleType>
  </xs:attribute>
  <xs:attribute name='lang'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='host'>
  <xs:complexType mixed='true'>
  </xs:complexType>
 </xs:element>
 <xs:element name='implementation'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='title' minOccurs='0' maxOccurs='unbounded'/>
   </xs:sequence>
  <xs:attribute name='identifier'/>
  <xs:attribute name='version'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='index'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='title' minOccurs='0' maxOccurs='unbounded'/>
     <xs:element ref='map' maxOccurs='unbounded'/>
     <xs:element ref='configInfo' minOccurs='0'/>
   </xs:sequence>
  <xs:attribute name='id'/>
  <xs:attribute name='search'>
   <xs:simpleType>
    <xs:restriction base='xs:string'>
     <xs:enumeration value='true'/>
     <xs:enumeration value='false'/>
    </xs:restriction>
   </xs:simpleType>
  </xs:attribute>
  <xs:attribute name='scan'>
   <xs:simpleType>
    <xs:restriction base='xs:string'>
     <xs:enumeration value='true'/>
     <xs:enumeration value='false'/>
    </xs:restriction>
   </xs:simpleType>
  </xs:attribute>
  <xs:attribute name='sort'>
   <xs:simpleType>
    <xs:restriction base='xs:string'>
     <xs:enumeration value='true'/>
     <xs:enumeration value='false'/>
    </xs:restriction>
   </xs:simpleType>
  </xs:attribute>
  </xs:complexType>
 </xs:element>
 <xs:element name='indexInfo'>
  <xs:complexType>
   <xs:sequence>
     <xs:choice maxOccurs='unbounded'>
       <xs:element ref='set'/>
       <xs:element ref='index'/>
       <xs:element ref='sortKeyword'/>
     </xs:choice>
   </xs:sequence>
  </xs:complexType>
 </xs:element>
 <xs:element name='langUsage'>
  <xs:complexType mixed='true'>
  <xs:attribute name='codes'/>
  <xs:attribute name='primary'>
   <xs:simpleType>
    <xs:restriction base='xs:string'>
     <xs:enumeration value='true'/>
     <xs:enumeration value='false'/>
    </xs:restriction>
   </xs:simpleType>
  </xs:attribute>
  <xs:attribute name='lang'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='link'>
  <xs:complexType mixed='true'>
  <xs:attribute name='type'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='links'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='agents' minOccurs='0'/>
     <xs:element ref='link' maxOccurs='unbounded'/>
   </xs:sequence>
  </xs:complexType>
 </xs:element>
 <xs:element name='map'>
  <xs:complexType>
   <xs:choice>
      <xs:element ref='attr' maxOccurs='unbounded'/>
     <xs:element ref='name'/>
   </xs:choice>
  <xs:attribute name='primary' default='false'>
   <xs:simpleType>
    <xs:restriction base='xs:string'>
     <xs:enumeration value='true'/>
     <xs:enumeration value='false'/>
    </xs:restriction>
   </xs:simpleType>
  </xs:attribute>
  </xs:complexType>
 </xs:element>
 <xs:element name='metaInfo'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='dateModified'/>
     <xs:sequence minOccurs='0'>
       <xs:element ref='aggregatedFrom'/>
       <xs:element ref='dateAggregated'/>
     </xs:sequence>
   </xs:sequence>
  </xs:complexType>
 </xs:element>
 <xs:element name='name'>
  <xs:complexType mixed='true'>
  <xs:attribute name='set'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='open'>
  <xs:complexType mixed='true'>
  </xs:complexType>
 </xs:element>
 <xs:element name='password'>
  <xs:complexType mixed='true'>
  </xs:complexType>
 </xs:element>
 <xs:element name='port'>
  <xs:complexType mixed='true'>
  </xs:complexType>
 </xs:element>
 <xs:element name='recordInfo'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='recordSyntax' maxOccurs='unbounded'/>
   </xs:sequence>
  </xs:complexType>
 </xs:element>
 <xs:element name='recordSyntax'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='elementSet' maxOccurs='unbounded'/>
   </xs:sequence>
  <xs:attribute name='name'/>
  <xs:attribute name='identifier'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='restrictions'>
  <xs:complexType mixed='true'>
  <xs:attribute name='primary'>
   <xs:simpleType>
    <xs:restriction base='xs:string'>
     <xs:enumeration value='true'/>
     <xs:enumeration value='false'/>
    </xs:restriction>
   </xs:simpleType>
  </xs:attribute>
  <xs:attribute name='lang'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='schema'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='title' minOccurs='0' maxOccurs='unbounded'/>
   </xs:sequence>
  <xs:attribute name='identifier' use='required'/>
  <xs:attribute name='name' use='required'/>
  <xs:attribute name='location'/>
  <xs:attribute name='sort' default='false'>
   <xs:simpleType>
    <xs:restriction base='xs:string'>
     <xs:enumeration value='true'/>
     <xs:enumeration value='false'/>
    </xs:restriction>
   </xs:simpleType>
  </xs:attribute>
  <xs:attribute name='retrieve' default='true'>
   <xs:simpleType>
    <xs:restriction base='xs:string'>
     <xs:enumeration value='true'/>
     <xs:enumeration value='false'/>
    </xs:restriction>
   </xs:simpleType>
  </xs:attribute>
  </xs:complexType>
 </xs:element>
 <xs:element name='schemaInfo'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='schema' maxOccurs='unbounded'/>
   </xs:sequence>
  </xs:complexType>
 </xs:element>
 <xs:element name='serverInfo'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='host'/>
     <xs:element ref='port'/>
     <xs:element ref='database'/>
     <xs:element ref='authentication' minOccurs='0'/>
   </xs:sequence>
  <xs:attribute name='protocol'/>
  <xs:attribute name='version'/>
  <xs:attribute name='transport'/>
  <xs:attribute name='method'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='set'>
  <xs:complexType>
   <xs:sequence>
     <xs:element ref='title' minOccurs='0' maxOccurs='unbounded'/>
   </xs:sequence>
  <xs:attribute name='name' use='required'/>
  <xs:attribute name='identifier' use='required'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='setting'>
  <xs:complexType mixed='true'>
  <xs:attribute name='type' use='required'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='sortKeyword'>
  <xs:complexType mixed='true'>
  </xs:complexType>
 </xs:element>
 <xs:element name='supports'>
  <xs:complexType mixed='true'>
  <xs:attribute name='type' use='required'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='title'>
  <xs:complexType mixed='true'>
  <xs:attribute name='primary'>
   <xs:simpleType>
    <xs:restriction base='xs:string'>
     <xs:enumeration value='true'/>
     <xs:enumeration value='false'/>
    </xs:restriction>
   </xs:simpleType>
  </xs:attribute>
  <xs:attribute name='lang'/>
  </xs:complexType>
 </xs:element>
 <xs:element name='user'>
  <xs:complexType mixed='true'>
  </xs:complexType>
 </xs:element>
</xs:schema>