<https://crew.org.nz/forum/index.php?/forums/topic/166-smaller-foresail-depowering-my-rig/page/2/#comment-3615>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://crew.org.nz/forum/index.php?/forums/topic/166-smaller-foresail-depowering-my-rig/page/2/&tab=comments#comment-3619>