<https://article.tebyan.net/75290/%d8%a7%d8%b9%d8%ac%d8%a7%d8%b2-%d8%af%d9%8a%da%af%d8%b1%d9%8a-%d8%a7%d8%b2-%d9%82%d8%b1%d8%a2%d9%86>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://article.tebyan.net/75290/\u0627\u0639\u062C\u0627\u0632-\u062F\u064A\u06AF\u0631\u064A-\u0627\u0632-\u0642\u0631\u0622\u0646>