@prefix :  <http://example.org/x/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .

_:ont a owl:Ontology .

:p a owl:ObjectProperty . 
:c a owl:Class .

 :x :p :y.
 :x rdf:type :c.
