<https://fa.wikirug.org/wiki/%D9%84%DA%86%DA%A9_%D9%88_%D8%AA%D8%B1%D9%86%D8%AC>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://fa.wikirug.org/wiki/%D9%84%DA%86%DA%A9_%D9%88_%D8%AA%D8%B1%D9%86%D8%AC>