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

<http://www.irandoc.acir/onto/irandoc/NEMA0002600>
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0001377>, <http://www.irandoc.acir/onto/irandoc/NEMA0002601> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/NEMA0002602>, <http://www.irandoc.acir/onto/irandoc/NEMA0001707> ;
  skos:prefLabel "نفت پلمه‌سنگ"@fa, "shale oil"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/NEMA0001377>
  skos:prefLabel "شیل‌های نفتی"@fa, "oil shales"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0002600> .

<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/NEMA0002600> .

<http://www.irandoc.acir/onto/irandoc/NEMA0001707>
  skos:prefLabel "روغن‌ها"@fa, "oils"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/NEMA0002600> .

<http://www.irandoc.acir/onto/irandoc/NEMA0002602>
  skos:prefLabel "سوخت‌های فسیلی"@fa, "fossil fuels"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/NEMA0002600> .