{{PositiveEntailmentTestCase
|id=rdfbased-dat-dtype-language-valid
|description=The datatype xsd:language consists of all strings representing language tags according to [BCP 47].
|author=Michael Schneider, Kai Mainzer
|syntax=RDF/XML
|semantics=Test applies only to RDF-based semantics
|rlrulescomplete=Yes
|consistent-ontology=<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:owl="http://www.w3.org/2002/07/owl#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
    xmlns:ex="http://www.example.org#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" > 
  <rdf:Description rdf:about="http://www.example.org#w1">
    <owl:sameAs rdf:datatype="http://www.w3.org/2001/XMLSchema#language">en</owl:sameAs>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.example.org#w2">
    <owl:sameAs rdf:datatype="http://www.w3.org/2001/XMLSchema#language">en-uk</owl:sameAs>
  </rdf:Description>
</rdf:RDF>
|conclusion-ontology=<rdf:RDF
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:owl="http://www.w3.org/2002/07/owl#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
    xmlns:ex="http://www.example.org#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" > 
  <rdf:Description rdf:about="http://www.example.org#w1">
    <rdf:type rdf:resource="http://www.w3.org/2001/XMLSchema#language"/>
  </rdf:Description>
  <rdf:Description rdf:about="http://www.example.org#w2">
    <rdf:type rdf:resource="http://www.w3.org/2001/XMLSchema#language"/>
  </rdf:Description>
</rdf:RDF>
}}