@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix zbwext: <http://zbw.eu/namespaces/zbw-extensions/> .
@prefix ns0: <http://www.geonames.org/ontology#> .
@prefix wd: <http://www.wikidata.org/entity/> .
@prefix schema: <http://schema.org/> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .

<https://pm20.zbw.eu/category/ware/i/142294>
  skos:notation "PRB02.06" ;
  rdfs:label "Petroleum"@en, "Erdöl"@de ;
  skos:prefLabel "Petroleum"@en, "Erdöl"@de ;
  a skos:Concept ;
  skos:narrower <https://pm20.zbw.eu/category/ware/i/143627> .

zbwext:notationLong
  rdfs:subPropertyOf skos:notation ;
  skos:definition """EXPERIMENTAL: Notation with
    blanks and leading zeros for sortability."""@en ;
  rdfs:label "NotationLong"@en .

<https://pm20.zbw.eu/category/ware/i/143627>
  skos:prefLabel "Oil shale, shale oil"@en, "Ölschiefer, Schieferöl"@de ;
  ns0:wikipediaArticle <https://de.wikipedia.org/wiki/%C3%96lschiefer>, <https://en.wikipedia.org/wiki/Oil_shale> ;
  rdfs:label "Ölschiefer, Schieferöl"@de, "Oil shale, shale oil"@en ;
  skos:inScheme <https://pm20.zbw.eu/category/ware> ;
  skos:exactMatch wd:Q221378 ;
  schema:subjectOf <https://pm20.zbw.eu/category/ware/i/143627/about> ;
  skos:notation "PRB02.06-Eo03" ;
  zbwext:notationLong "06.10.0-02" ;
  a skos:Concept ;
  skos:broader <https://pm20.zbw.eu/category/ware/i/142294> ;
  dc:identifier "143627" ;
  owl:sameAs <http://purl.org/pressemappe20/category/ware/i/143627> .

<https://pm20.zbw.eu/category/ware> a skos:ConceptScheme .