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

<http://www.irandoc.acir/onto/irandoc/insp0008086>
  skos:prefLabel "Materials"@en, "مواد"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/insp0007722> .

<http://www.irandoc.acir/onto/irandoc/insp0007722>
  skos:altLabel "windows, acoustic"@en ;
  skos:related <http://www.irandoc.acir/onto/irandoc/insp0015171> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/insp0008086> ;
  skos:prefLabel "Acoustic materials"@en, "مواد صوتی"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/insp0015171>
  skos:prefLabel "Acoustic filter"@en, "صافی صوت"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/insp0007722> .