Extensibility
RDF encourages ad-hoc conventions/extensions:
- rdf:type
- rdfs:subClassOf
- rdfs:subPropertyOf
<wsse:SecurityToken wsp:Preference="100"> <rdf:type rdf:resource="http://signon.example/#SingleSignonToken"/> <wsp:Usage rdf:resource="http://www.w3.org/2004/08/20-ws-pol-pos/ns#Required"/> <wsse:tokenType>wsse:Kerberosv5TGT</wsse:tokenType> <ss:issuer rdf:resource="http://signon.example/agents#intra1"/> </wsse:SecurityToken>