<https://www.satsds.com>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.satsds.com/threads/%D8%A3%D9%85%D8%B7%D8%A7%D8%B1-%D9%88%D8%B1%D9%8A%D8%A7%D8%AD-%D9%82%D9%88%D9%8A%D8%A9-%D9%81%D9%8A-%D8%B9%D8%AF%D8%A9-%D9%88%D9%84%D8%A7%D9%8A%D8%A7%D8%AA.1332/>