foaf:topic leaf node

@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix vs: <http://www.w3.org/2003/06/sw-vocab-status/ns#> .

foaf:topic a rdf:Property,
        owl:ObjectProperty ;
    rdfs:label "topic" ;
    rdfs:comment "A topic of some page or document." ;
    rdfs:domain foaf:Document ;
    rdfs:isDefinedBy foaf: ;
    rdfs:range owl:Thing ;
    owl:inverseOf foaf:page ;
    vs:term_status "testing" .