@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix : <http://www.w3.org/2002/ws/sawsdl/spec/example/ontology/SampleOntology#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .

<http://www.w3.org/2002/ws/sawsdl/spec/ontology/SampleOntology#> rdf:type owl:Ontology .

  :SKU rdf:type owl:Class;
    rdfs:subClassOf :PartNumber .
  :Quantity rdf:type owl:Class .
  :DeliveryDate rdf:type owl:Class .
  :AvailabilityConfirmation rdf:type owl:Class .