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

<http://www.irandoc.acir/onto/irandoc/insp0007339>
  skos:related <http://www.irandoc.acir/onto/irandoc/insp0007600> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/insp0007691> ;
  skos:prefLabel "Duality (mathematics)"@en, "دوگانی (ریاضیات)"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/insp0007691>
  skos:prefLabel "Mathematics"@en, "ریاضی"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/insp0007339> .

<http://www.irandoc.acir/onto/irandoc/insp0007600>
  skos:prefLabel "Mathematical operators"@en, "عملگر ریاضی"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/insp0007339> .