@prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> .
@prefix rdf:   <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfg:  <http://www.w3.org/2004/03/trix/rdfg-1/> .

rdfg:subGraphOf  a    rdf:Property ;
        rdfs:comment  "\nThe graph associated with the subject is a subgraph of a graph equivalent\nto that associated with the object.\n      " ;
        rdfs:domain   rdfg:Graph ;
        rdfs:label    "subgraph of" ;
        rdfs:range    rdfg:Graph .

rdfg:Graph  a         rdfs:Class ;
        rdfs:comment  "\nAn RDF graph (with intensional semantics).\n      " ;
        rdfs:label    "Graph" .

rdfg:equivalentGraph  a  rdf:Property ;
        rdfs:comment  "\nThe graphs associated with the subject and object are equivalent.\n      " ;
        rdfs:domain   rdfg:Graph ;
        rdfs:label    "equivalent graph" ;
        rdfs:range    rdfg:Graph .