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

<http://www.irandoc.acir/onto/irandoc/NEMA0004844>
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0004545>, <http://www.irandoc.acir/onto/irandoc/NEMA0004847>, <http://www.irandoc.acir/onto/irandoc/NEMA0002601> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/NEMA0004849> ;
  skos:prefLabel "petroleum extraction"@en, "استخراج نفت"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<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/NEMA0004844> .

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

<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/NEMA0004844> .

<http://www.irandoc.acir/onto/irandoc/NEMA0004545>
  skos:prefLabel "استخراج"@fa, "extraction"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0004844> .