<https://forum.kerbalspaceprogram.com/index.php?/topic/209147-show-and-tell-mammoth-ii-engine/page/4/#comment-4160826>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.kerbalspaceprogram.com/index.php?/topic/209147-show-and-tell-mammoth-ii-engine/page/4/#comment-4160826>