@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix owl: <http://www.w3.org/2002/07/owl#>.
@prefix : <foo:bla#>.
:name a owl:DatatypeProperty; a owl:FunctionalProperty.
:Country owl:hasKey (:carCode).
:Germany a :Country; :carCode "D"; :name "Germany".
:DominicanRepublic a :Country; :carCode "D"; :name "Dominican Republic".
:Duesseldorf  a :City; :carCode "D"; :name "Duesseldorf".