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

<http://www.irandoc.acir/onto/irandoc/b96ba7a9-cce1-470c-b80c-6dadb2c6b8e9>
  skos:prefLabel "Optimization problems"@en, "مسائل بهینه‌سازی"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/929c7207-7174-4a78-b4f8-d26c87110620> .

<http://rdf-vocabulary.ddialliance.org/xkos#type> rdfs:label "type"@en, "نوع"@fa .
<http://www.irandoc.acir/onto/irandoc/929c7207-7174-4a78-b4f8-d26c87110620>
  ns0:type skos:Concept ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/b96ba7a9-cce1-470c-b80c-6dadb2c6b8e9> ;
  skos:prefLabel "Np-hard problems"@en, "مسائل np-سخت"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .