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

<http://www.irandoc.acir/onto/irandoc/AGR0002566>
  skos:prefLabel "Aromatic hydrocarbons"@en, "هیدروکربن‌های آروماتیک"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/AGR0002565> .

<http://www.irandoc.acir/onto/irandoc/AGR0002565>
  skos:broader <http://www.irandoc.acir/onto/irandoc/AGR0002566> ;
  skos:prefLabel "Xylene"@en, "گزیلن"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .