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

<http://www.irandoc.acir/onto/irandoc/INSP0004877>
  skos:narrower <http://www.irandoc.acir/onto/irandoc/INSP0004876> ;
  skos:related <http://www.irandoc.acir/onto/irandoc/INSP0012710>, <http://www.irandoc.acir/onto/irandoc/INSP0004878> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/INSP0004918> ;
  skos:prefLabel "نورشناسی هندسی"@fa, "geometrical optics"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/INSP0004878>
  skos:prefLabel "نورشناسی شاخص شیب"@fa, "gradient index optics"@en ;
  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 "نظریه هندسی پراش"@fa, "geometrical theory of diffraction"@en ;
  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 "ردیابی پرتوها"@fa, "ray tracing"@en ;
  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 "نورشناسی"@fa, "optics"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/INSP0004877> .