<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/Book>
<https://ar.scribd.com/doc/26396530/%D8%AA%D8%B9%D9%84%D9%85-%D8%A7%D9%84%D9%85%D9%82%D8%A7%D9%85%D8%A7%D8%AA-%D8%A7%D9%84%D9%85%D9%88%D8%B3%D9%8A%D9%82%D9%8A%D8%A9>