@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<http://www.irandoc.acir/onto/irandoc/CHMTR000150>
  skos:prefLabel "oil well"@en, "چاه نفت"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/CHMTR000044> .

<http://www.irandoc.acir/onto/irandoc/CHMTR000063>
  skos:prefLabel "petroleum refining"@en, "پالایش نفت"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/CHMTR000044> .

<http://www.irandoc.acir/onto/irandoc/CHMTR000388>
  skos:prefLabel "نفت خام"@fa, "petroleum"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/CHMTR000044> .

<http://www.irandoc.acir/onto/irandoc/CHMTR000044>
  skos:related <http://www.irandoc.acir/onto/irandoc/CHMTR000150>, <http://www.irandoc.acir/onto/irandoc/CHMTR000063>, <http://www.irandoc.acir/onto/irandoc/CHMTR000388> ;
  skos:prefLabel "امتیاز اكتشاف نفت"@fa, "petroleum prospecting concession"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .