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

<http://www.irandoc.acir/onto/irandoc/EIT0010503>
  skos:related <http://www.irandoc.acir/onto/irandoc/EIT0004375> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/EIT0010505> ;
  skos:prefLabel "تبدیل بسامد نوری"@fa, "optical frequency conversion"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/EIT0010505>
  skos:prefLabel "نورشناسی غیرخطی"@fa, "nonlinear optics"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/EIT0010503> .

<http://www.irandoc.acir/onto/irandoc/EIT0004375>
  skos:prefLabel "frequency converter"@en, "واگردان بسامد"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/EIT0010503> .