@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix ex: <http://example.org#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@base <http://example.org/ontology1> .

<http://example.org/ontology1> rdf:type owl:Ontology .

ex:Class1 rdf:type owl:Class .
ex:Class2 rdf:type owl:Class .
