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

<http://www.irandoc.acir/onto/irandoc/NEMA0004432>
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0004433>, <http://www.irandoc.acir/onto/irandoc/NEMA0004428> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/NEMA0004434> ;
  skos:prefLabel "گرمایش گازی"@fa, "gas heating"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/NEMA0004434>
  skos:prefLabel "گرمایش"@fa, "heating"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/NEMA0004432> .

<http://www.irandoc.acir/onto/irandoc/NEMA0004428>
  skos:prefLabel "گرمایش آب گرم"@fa, "hot water heating"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0004432> .

<http://www.irandoc.acir/onto/irandoc/NEMA0004433>
  skos:prefLabel "warm air heating"@en, "گرمایش هوای گرم"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0004432> .