@prefix : <foo://bla/meta#> .
@prefix p: <foo://bla/persons/> .
@prefix owl: <http://www.w3.org/2002/07/owl#>.
p:john a :Person; :name "John"; :hasChild [ a :Person].
:Parent a owl:Class; owl:equivalentClass
  [ a owl:Restriction; owl:onProperty :hasChild; owl:minCardinality 1].