@prefix :       <http://semanticweb.cs.vu.nl/graph/version/> .
@prefix rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs:   <http://www.w3.org/2000/01/rdf-schema#> .
@prefix dc:	<http://purl.org/dc/terms/> .
@prefix skos:   <http://www.w3.org/2004/02/skos/core#> .
@prefix owl:    <http://www.w3.org/2002/07/owl#> .

:VersionObject a rdfs:Class .

:Commit rdfs:subClassOf :VersionObject .
:Branch a rdfs:Class .

:comment rdfs:subProperty rdfs:comment .

:committer_url rdfs:subProperty dc:creator .
:author_url rdfs:subProperty dc:creator .

:committer_date    rdfs:subProperty dc:date .
:author_date       rdfs:subProperty dc:date .

:committer_email a owl:ObjectProperty.
:author_email a owl:ObjectProperty.

:tree   a rdf:Property ;
	rdfs:domain :Commit ;
	rdfs:range  :Tree .

:parent a rdf:Property ;
	rdfs:domain :Commit ;
	rdfs:range  :Commit .

:tip a rdf:Property ;
        rdfs:domain :Branch ;
        rdfs:range  :Commit .
:branch a rdf:Property ;
	rdfs:range :Branch .