@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix ns0: <http://rdf-vocabulary.ddialliance.org/xkos#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<http://rdf-vocabulary.ddialliance.org/xkos#is_defined_by> rdfs:label "تعریف شده توسط"@fa, "is defined by"@en .
<http://www.irandoc.acir/onto/irandoc/mathpro2610>
  ns0:is_defined_by <http://www.irandoc.acir/onto/irandoc/mathpro1335> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/mathpro564> ;
  skos:prefLabel "هارمونیک سطحی"@fa, "surface harmonic"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/mathpro1335>
  skos:prefLabel "نظریه معادلات دیفرانسیل"@fa, "theory of differential equations"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/mathpro564>
  skos:prefLabel "تابع"@fa, "عملکرد"@fa, "function"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/mathpro2610> .