<?xml version="1.0" encoding="utf-8"?>
<rdf:RDF 
  xmlns:dct="http://purl.org/dc/terms/" 
  xmlns:owl="http://www.w3.org/2002/07/owl#" 
  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" 
  xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" 
  xmlns:skos="http://www.w3.org/2004/02/skos/core#">
  <!--
    This schema represents a formalisation of the semantic conditions
    described in the SKOS eXtension for Labels (SKOS-XL) appendix of the
    SKOS Reference document dated 18 August 2009, accessible at
    http://www.w3.org/TR/2009/REC-skos-reference-20090818/#xl. XML comments
    of the form Sn are used to indicate the semantic conditions that are
    being expressed. A number of semantic conditions are *not* expressed formally in this schema. These are:
      S51
      S55
      S56
      S57
    For the conditions listed above, rdfs:comments are used to indicate the conditions.
  -->   
  <owl:Ontology rdf:about="http://www.w3.org/2008/05/skos-xl">
    <dct:creator>Alistair Miles</dct:creator>
    <dct:creator>Sean Bechhofer</dct:creator>
    <rdfs:seeAlso rdf:resource="http://www.w3.org/2008/05/skos"/>
    <owl:imports rdf:resource="http://www.w3.org/2004/02/skos/core"/>
    <dct:title xml:lang="en">SKOS XL Vocabulary</dct:title>
    <dct:contributor>Participants in W3C's Semantic Web Deployment Working Group.</dct:contributor>
    <dct:description xml:lang="en">An RDF vocabulary extending SKOS and allowing the description and linking of lexical entities.</dct:description>
  </owl:Ontology>
  
  <rdf:Description rdf:about="http://www.w3.org/2008/05/skos-xl#Label">
    <rdfs:label xml:lang="en">Label</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2008/05/skos-xl"/>
    <skos:definition xml:lang="en">A special class of lexical entities.</skos:definition>
    <!-- S47 -->
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
    <!-- S48 -->
    <owl:disjointWith rdf:resource="http://www.w3.org/2004/02/skos/core#Concept"/>
    <!-- S48 -->
    <owl:disjointWith rdf:resource="http://www.w3.org/2004/02/skos/core#Collection"/>
    <!-- S48 -->
    <owl:disjointWith rdf:resource="http://www.w3.org/2004/02/skos/core#ConceptScheme"/>
    <!-- S52 -->
    <rdfs:subClassOf>
      <owl:Restriction>
        <owl:onProperty rdf:resource="http://www.w3.org/2008/05/skos-xl#literalForm"/>
        <owl:cardinality rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">1</owl:cardinality>
      </owl:Restriction>
    </rdfs:subClassOf>
  </rdf:Description>
  
  <rdf:Description rdf:about="http://www.w3.org/2008/05/skos-xl#literalForm">
    <rdfs:label xml:lang="en">literal form</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2008/05/skos-xl"/>
    <skos:definition xml:lang="en">The property skosxl:literalForm is used to give the literal form of an skosxl:Label.</skos:definition>
    <rdfs:comment xml:lang="en">If two instances of the class skosxl:Label have the same literal form, they are not necessarily the same resource.</rdfs:comment>
    <!-- S49 -->
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
    <!-- S50 -->
    <rdfs:domain rdf:resource="http://www.w3.org/2008/05/skos-xl#Label"/>
    <!-- S51 (not formally stated) -->
    <rdfs:comment xml:lang="en">The range of skosxl:literalForm is the class of RDF plain literals.</rdfs:comment>
    <!-- For non-OWL aware applications -->
    <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/>
  </rdf:Description>
  
  <rdf:Description rdf:about="http://www.w3.org/2008/05/skos-xl#prefLabel">
    <rdfs:label xml:lang="en">preferred label</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2008/05/skos-xl"/>
    <skos:definition xml:lang="en">The property skosxl:prefLabel is used to associate an skosxl:Label with a skos:Concept. The property is analogous to skos:prefLabel.</skos:definition>
    <rdfs:seeAlso rdf:resource="http://www.w3.org/2004/02/skos/core#prefLabel"/>
    <!-- S53 -->
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
    <!-- S54 -->
    <rdfs:range rdf:resource="http://www.w3.org/2008/05/skos-xl#Label"/>
    <!-- S55 (not formally stated) -->
    <rdfs:comment xml:lang="en">If C skosxl:prefLabel L and L skosxl:literalForm V, then X skos:prefLabel V.</rdfs:comment>
    <!-- For non-OWL aware applications -->
    <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/>   
  </rdf:Description>

  <rdf:Description rdf:about="http://www.w3.org/2008/05/skos-xl#altLabel">
    <rdfs:label xml:lang="en">alternative label</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2008/05/skos-xl"/>
    <skos:definition xml:lang="en">The property skosxl:altLabel is used to associate an skosxl:Label with a skos:Concept. The property is analogous to skos:altLabel.</skos:definition>
    <rdfs:seeAlso rdf:resource="http://www.w3.org/2004/02/skos/core#altLabel"/>
    <!-- S53 -->
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
    <!-- S54 -->
    <rdfs:range rdf:resource="http://www.w3.org/2008/05/skos-xl#Label"/>
    <!-- S56 (not formally stated) -->   
    <rdfs:comment xml:lang="en">If C skosxl:altLabel L and L skosxl:literalForm V, then X skos:altLabel V.</rdfs:comment>
    <!-- For non-OWL aware applications -->
    <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/>  
  </rdf:Description>
  
  <rdf:Description rdf:about="http://www.w3.org/2008/05/skos-xl#hiddenLabel">
    <rdfs:label xml:lang="en">hidden label</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2008/05/skos-xl"/>
    <skos:definition xml:lang="en">The property skosxl:hiddenLabel is used to associate an skosxl:Label with a skos:Concept. The property is analogous to skos:hiddenLabel.</skos:definition>
    <rdfs:seeAlso rdf:resource="http://www.w3.org/2004/02/skos/core#hiddenLabel"/>
    <!-- S53 -->
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
    <!-- S54 -->
    <rdfs:range rdf:resource="http://www.w3.org/2008/05/skos-xl#Label"/>
    <!-- S57 (not formally stated) -->   
    <rdfs:comment xml:lang="en">If C skosxl:hiddenLabel L and L skosxl:literalForm V, then C skos:hiddenLabel V.</rdfs:comment>
    <!-- For non-OWL aware applications -->
    <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/>  
  </rdf:Description>
  
  <rdf:Description rdf:about="http://www.w3.org/2008/05/skos-xl#labelRelation">
    <rdfs:label xml:lang="en">label relation</rdfs:label>
    <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2008/05/skos-xl"/>
    <skos:definition xml:lang="en">The property skosxl:labelRelation is used for representing binary ('direct') relations between instances of the class skosxl:Label.</skos:definition>
    <skos:scopeNote xml:lang="en">skosxl:labelRelation is not intended to be used directly, but rather as the basis for a design pattern which can be refined for more specific labeling scenarios.</skos:scopeNote>
    <!-- S58 -->
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
    <!-- S59 -->
    <rdfs:domain rdf:resource="http://www.w3.org/2008/05/skos-xl#Label"/>
    <!-- S60 -->
    <rdfs:range rdf:resource="http://www.w3.org/2008/05/skos-xl#Label"/>
    <!-- S61 -->
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#SymmetricProperty"/>
    <!-- For non-OWL aware applications -->
    <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"/> 
  </rdf:Description>
  
</rdf:RDF>