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

<http://www.irandoc.acir/onto/irandoc/CHMTR000131>
  skos:prefLabel "chemical compound"@en, "ترکیبات شیمیایی"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/CHMTR000130> .

<http://www.irandoc.acir/onto/irandoc/CHMTR000038>
  skos:prefLabel "آلودگی هوا"@fa, "air pollution"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/CHMTR000130> .

<http://www.irandoc.acir/onto/irandoc/CHMTR000130>
  skos:related <http://www.irandoc.acir/onto/irandoc/CHMTR000052>, <http://www.irandoc.acir/onto/irandoc/CHMTR000038> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/CHMTR000131> ;
  skos:prefLabel "lime powder"@en, "گرد آهك"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/CHMTR000052>
  skos:prefLabel "باران اسیدی"@fa, "acid rain"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/CHMTR000130> .