@prefix ex: <http://example.org/ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .

_:rdfs06 a owl:Ontology .

ex:a a owl:NamedIndividual .
ex:c a owl:NamedIndividual .
ex:b a owl:ObjectProperty .
ex:aType a owl:Class .

ex:a ex:b ex:c .
ex:b rdfs:domain ex:aType .