<https://community.fiverr.com/forums/topic/40542-i-have-no-idea-about-order-button-can-anyone-guide-me/#comment-242762>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://community.fiverr.com/forums/topic/40542-i-have-no-idea-about-order-button-can-anyone-guide-me/>