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

<http://www.irandoc.acir/onto/irandoc/EIT0013177>
  skos:prefLabel "هضم بی‌هوازی"@fa, "anaerobic digestion"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/EIT0013187> .

<http://www.irandoc.acir/onto/irandoc/EIT0013193>
  skos:prefLabel "تصفیه فاضلاب"@fa, "wastewater treatment"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/EIT0013187> .

<http://www.irandoc.acir/onto/irandoc/EIT0013187>
  skos:related <http://www.irandoc.acir/onto/irandoc/EIT0013177> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/EIT0013193> ;
  skos:prefLabel "تصفیه زیست‌شناختی فاضلاب"@fa, "biological sewage treatment"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .