<https://community.ceramicartsdaily.org/topic/25341-how-to-decide-how-many-parts-to-a-mould/#comment-203557>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://community.ceramicartsdaily.org/topic/25341-how-to-decide-how-many-parts-to-a-mould/?tab=comments#comment-202974>