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

<http://www.irandoc.acir/onto/irandoc/NEMA0008671>
  skos:prefLabel "فلزات خاکی کمیاب"@fa, "rare earth metals"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/NEMA0008667> .

<http://www.irandoc.acir/onto/irandoc/NEMA0008667>
  skos:broader <http://www.irandoc.acir/onto/irandoc/NEMA0008671> ;
  skos:prefLabel "لانتان"@fa, "lanthanum"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .