<https://www.insanelymac.com/forum/topic/79297-questions-i-coludnt-find-an-answer-for/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.insanelymac.com/forum/topic/79297-questions-i-coludnt-find-an-answer-for/>