<https://blog.parpareem.com/%d7%97%d7%9c%d7%95%d7%9e%d7%95%d7%aa-%d7%a2%d7%9c-%d7%96%d7%95%d7%92%d7%99%d7%95%d7%aa-%d7%9c%d7%a4%d7%99-%d7%94%d7%a7%d7%91%d7%9c%d7%94/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.parpareem.com/tag/%D7%97%D7%9C%D7%95%D7%9D-%D7%A2%D7%9C-%D7%90%D7%94%D7%91%D7%94-%D7%9C%D7%A4%D7%99-%D7%94%D7%A7%D7%91%D7%9C%D7%94/>