@prefix relations: <https://w3id.org/zpid/vocabs/relations/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .

relations:
  skos:prefLabel "Resource Relations"@en, "Ressourcenbeziehungen"@de ;
  a skos:ConceptScheme .

relations:hasElectronicVersion
  rdfs:domain <http://id.loc.gov/ontologies/bibframe/Instance> ;
  rdfs:range <http://id.loc.gov/ontologies/bibframe/Instance> ;
  skos:broader relations:hasOtherPhysicalFormat ;
  skos:scopeNote "Relates a print article to its pdf version."@en ;
  skos:inScheme relations: ;
  skos:prefLabel "has electronic version"@en, "hat elektronische Version"@de ;
  a rdf:Property, skos:Concept .

relations:hasPrintVersion owl:inverseOf relations:hasElectronicVersion .
relations:hasOtherPhysicalFormat
  skos:prefLabel "has other physical format"@en, "hat andere physische Form"@de ;
  a owl:SymmetricProperty, rdf:Property, skos:Concept ;
  skos:narrower relations:hasElectronicVersion .