lClass axioms
nowl:Class class-name(URI)
nowl:subClassOf class-expression
nowl:disjointWith class-expression
nowl:equivalentClass class-expression
n
<owl:Class
rdf:about="#Opera">
<rdfs:subClassOf>
<owl:Restriction>
<owl:onProperty rdf:resource="#hasLibrettist" />
<owl:minCardinality
rdf:datatype="&xsd;nonNegativeInteger">1</owl:minCardinality>
</owl:Restriction>
</rdfs:subClassOf>
</owl:Class>