@prefix : <foo://bla/meta#>.
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
@prefix owl: <http://www.w3.org/2002/07/owl#>.
 [ :name "John";  :age 35;
   :hasChild [:name "Alice"; :age 10], [:name "Bob"; :age 8], [:age 12 ];
   rdf:type :OneChildParent].
:OneChildParent owl:equivalentClass [rdf:type owl:Restriction;
  owl:onProperty :hasChild; owl:cardinality 1].