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

<http://www.irandoc.acir/onto/irandoc/insp0003555>
  skos:related <http://www.irandoc.acir/onto/irandoc/insp0007828>, <http://www.irandoc.acir/onto/irandoc/insp0003551>, <http://www.irandoc.acir/onto/irandoc/insp0007787> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/insp0003558>, <http://www.irandoc.acir/onto/irandoc/insp0007931> ;
  skos:prefLabel "Optical glass"@en, "شیشه اپتیکی"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/insp0007828>
  skos:prefLabel "Optical fibres"@en, "الیاف نوری"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/insp0003555> .

<http://www.irandoc.acir/onto/irandoc/insp0003558>
  skos:prefLabel "Glass"@en, "شیشه"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/insp0003555> .

<http://www.irandoc.acir/onto/irandoc/insp0007931>
  skos:prefLabel "Optical materials"@en, "مواد نوری"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/insp0003555> .

<http://www.irandoc.acir/onto/irandoc/insp0003551>
  skos:prefLabel "Glass fibres"@en, "الیاف شیشه"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/insp0003555> .

<http://www.irandoc.acir/onto/irandoc/insp0007787>
  skos:prefLabel "Semiconductor doped glass"@en, "شیشه آلاییده نیم‌رسانا"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/insp0003555> .