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

<http://www.irandoc.acir/onto/irandoc/insp0004878>
  skos:prefLabel "Gradient index optics"@en, "نورشناسی شاخص شیب"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/insp0004877> .

<http://www.irandoc.acir/onto/irandoc/insp0012710>
  skos:prefLabel "Geometrical theory of diffraction"@en, "نظریه هندسی پراش"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/insp0004877> .

<http://www.irandoc.acir/onto/irandoc/insp0004876>
  skos:prefLabel "Ray tracing"@en, "ردیابی پرتوها"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/insp0004877> .

<http://www.irandoc.acir/onto/irandoc/insp0004918>
  skos:prefLabel "Optics"@en, "نورشناسی"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/insp0004877> .

<http://www.irandoc.acir/onto/irandoc/insp0004877>
  skos:narrower <http://www.irandoc.acir/onto/irandoc/insp0004876> ;
  skos:related <http://www.irandoc.acir/onto/irandoc/insp0004878>, <http://www.irandoc.acir/onto/irandoc/insp0012710> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/insp0004918> ;
  skos:prefLabel "Geometrical optics"@en, "نورشناسی هندسی"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .