@prefix : <foo://bla/meta#>.   @prefix p: <foo://bla/persons/>.
@prefix owl: <http://www.w3.org/2002/07/owl#>.
:BadIdea a owl:Class; a owl:Restriction;
           owl:onProperty :hasChild; owl:minCardinality 1.
p:john :hasChild p:alice.
:cl a owl:Class.