<rdf:RDF  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#"
          xmlns:foaf="http://xmlns.com/foaf/0.1/"
          xmlns:dct="http://purl.org/dc/terms/"
          xmlns:ex="http://my.example.org/extensions#"
          xmlns:sex="http://www.w3.org/2004/02/skos/extensions#">
          

  <!-- N.B. skos:semanticRelation is intended to be used as the root of a PROPERTY HIERARCHY.  This means you can DEFINE AND USE YOUR OWN SEMANTIC RELATION PROPERTIES, and still be interoperable with standard SKOS tools. -->

  <!-- skos:semanticRelation can be extended directly (via rdfs:subPropertyOf), although usually one of the SKOS Core semantic relation properties is extended (i.e. skos:related, skos:broader/skos:narrower).
  -->
  
  <!-- Example of describing and using a sub-property of skos:related
  ... -->
  
  <rdf:Property rdf:about="http://my.example.org/extensions#isPartOf">
    <rdfs:label xml:lang="en">is part of</rdfs:label>
    <rdfs:subPropertyOf rdf:resource="http://www.w3.org/2004/02/skos/core#related"/>
  </rdf:Property>
  
  <rdf:Property rdf:about="http://my.example.org/extensions#hasPart">
    <rdfs:label xml:lang="en">has part</rdfs:label>
    <rdfs:subPropertyOf rdf:resource="http://www.w3.org/2004/02/skos/core#related"/>
  </rdf:Property>
  
  <skos:Concept rdf:about="http://my.example.org/banana#concept">
    <skos:prefLabel>banana</skos:prefLabel>
    <ex:isPartOf rdf:resource="http://my.example.org/bananasplit#concept"/>
  </skos:Concept>
  
  <skos:Concept rdf:about="http://my.example.org/bananasplit#concept">
    <skos:prefLabel>banana split</skos:prefLabel>
    <ex:hasPart rdf:resource="http://my.example.org/banana#concept"/>
  </skos:Concept>
  
  
  <!-- Example of descriptions and application of sub-properties of skos:broader/skos:narrower from the SKOS Extensions vocabulary:
  http://www.w3.org/2004/02/skos/extensions
  ... -->
  
  <rdf:Property rdf:about="http://www.w3.org/2004/02/skos/extensions#broaderGeneric">
    <rdfs:label xml:lang="en">broader (generic)</rdfs:label>
    <rdfs:comment xml:lang="en">An extension of the 'broader' property to specify the type-generic (sub-class/super-class) relationship between two concepts.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#TransitiveProperty"/>
    <rdfs:subPropertyOf rdf:resource="http://www.w3.org/2004/02/skos/core#broader"/>
    <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2004/02/skos/extensions"/>
  </rdf:Property>
  
  <rdf:Property rdf:about="http://www.w3.org/2004/02/skos/extensions#narrowerGeneric">
    <rdfs:label xml:lang="en">narrower (generic)</rdfs:label>
    <rdfs:comment>This property is the inverse of the 'broaderGeneric' property.</rdfs:comment>
    <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#TransitiveProperty"/>
    <rdfs:subPropertyOf rdf:resource="http://www.w3.org/2004/02/skos/core#narrower"/>
    <owl:inverseOf rdf:resource="http://www.w3.org/2004/02/skos/extensions#broaderGeneric"/>
    <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2004/02/skos/extensions"/>
  </rdf:Property>
  
  <skos:Concept rdf:about="http://my.example.org/banana#concept">
    <skos:prefLabel>banana</skos:prefLabel>
    <sex:broaderGeneric rdf:resource="http://my.example.org/fruit#concept"/>
  </skos:Concept>  
  
  <skos:Concept rdf:about="http://my.example.org/fruit#concept">
    <skos:prefLabel>fruit</skos:prefLabel>
    <sex:narrowerGeneric rdf:resource="http://my.example.org/banana#concept"/>
  </skos:Concept>
   
</rdf:RDF>