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

<http://www.irandoc.acir/onto/irandoc/SOC0003790>
  skos:narrower <http://www.irandoc.acir/onto/irandoc/SOC0003789> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/SOC0003791> ;
  skos:prefLabel "Opiates"@en, "افیون ‌مایه"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/SOC0003789>
  skos:prefLabel "Heroin"@en, "هرویین"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/SOC0003790> .

<http://www.irandoc.acir/onto/irandoc/SOC0003791>
  skos:prefLabel "Narcotic Drugs"@en, "داروی مخدر"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/SOC0003790> .