@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#> .

_:rdfs01 a owl:Ontology .
 
ex:a a owl:NamedIndividual .
ex:b a owl:NamedIndividual .
ex:c a owl:ObjectProperty .
ex:d a owl:ObjectProperty .
ex:e a owl:ObjectProperty .
ex:f a owl:ObjectProperty .

ex:c rdfs:subPropertyOf ex:d .
ex:d rdfs:subPropertyOf ex:e .
ex:e rdfs:subPropertyOf ex:f .

ex:a ex:c ex:b .
