<https://sawtechlef.com/tag/%d8%a7%d9%84%d8%aa%d9%82%d9%84%d8%a8%d8%a7%d8%aa-%d8%a7%d9%84%d8%ac%d9%88%d9%8a%d8%a9#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://sawtechlef.com/tag/%D8%A7%D9%84%D8%AA%D9%82%D9%84%D8%A8%D8%A7%D8%AA-%D8%A7%D9%84%D8%AC%D9%88%D9%8A%D8%A9>