<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/Organization>
<http://www.farahat-library.com/blog/2010/01/%D8%AF%D9%88%D8%B1%D8%A9-%D8%B3%D9%8A%D8%B3%D9%83%D9%88-%D8%A7%D9%84%D8%AA%D8%A3%D9%87%D9%8A%D9%84-%D9%85%D8%B3%D8%A7%D8%B1-%D8%A7%D9%84%D8%B4%D8%A8%D9%83%D8%A7%D8%AA-qualification-course/>