@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix tz: <http://www.w3.org/2006/timezone#> .

tz:TimeZone a owl:DatatypeProperty,
        owl:FunctionalProperty ;
    rdfs:label "has time zone"@en ;
    rdfs:comment "The time zone relating to an entity."@en ;
    rdfs:isDefinedBy tz: .