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

<http://www.irandoc.acir/onto/irandoc/NEMA0004844>
  skos:prefLabel "petroleum extraction"@en, "استخراج نفت"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0004847> .

<http://www.irandoc.acir/onto/irandoc/NEMA0001885>
  skos:prefLabel "زمین‌شناسی نفت"@fa, "petroleum geology"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0004847> .

<http://www.irandoc.acir/onto/irandoc/NEMA0004849>
  skos:prefLabel "petroleum technology"@en, "فناوری نفت"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/NEMA0004847> .

<http://www.irandoc.acir/onto/irandoc/NEMA0005742>
  skos:prefLabel "حفاران چاه"@fa, "well drillers"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0004847> .

<http://www.irandoc.acir/onto/irandoc/NEMA0004847>
  a skos:Concept, <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept> ;
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0006133>, <http://www.irandoc.acir/onto/irandoc/NEMA0001885>, <http://www.irandoc.acir/onto/irandoc/NEMA0008201>, <http://www.irandoc.acir/onto/irandoc/NEMA0004844>, <http://www.irandoc.acir/onto/irandoc/NEMA0005742>, <http://www.irandoc.acir/onto/irandoc/NEMA0002601> ;
  skos:prefLabel "petroleum wells"@en, "چاه‌های نفت"@fa ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/NEMA0004849> .

<http://www.irandoc.acir/onto/irandoc/NEMA0002601>
  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/NEMA0004847> .

<http://www.irandoc.acir/onto/irandoc/NEMA0008201>
  skos:prefLabel "منابع نفتی"@fa, "petroleum resources"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0004847> .

<http://www.irandoc.acir/onto/irandoc/NEMA0006133>
  skos:prefLabel "بررسی‌های چاه"@fa, "well surveys"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0004847> .