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

<http://www.irandoc.acir/onto/irandoc/CAB0057213>
  skos:prefLabel "تبادل کاتیون"@fa, "cation exchange"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/CAB0057211> .

<http://www.irandoc.acir/onto/irandoc/CAB0057211>
  skos:broader <http://www.irandoc.acir/onto/irandoc/CAB0057213> ;
  skos:prefLabel "تبادل سدیم-کلسیم"@fa, "sodium-calcium exchange"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .