<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/AggregateRating>
<https://ar.scribd.com/doc/7316827/%D8%A3%D8%B9%D8%A7%D8%B5%D9%8A%D8%B1-%D9%81%D9%89-%D8%A8%D9%84%D8%A7%D8%AF-%D8%A7%D9%84%D8%B4%D8%A7%D9%85>