<https://www.stevejenkins.com/blog/2015/03/video-field-stripping-a-ruger-mark-i-with-the-gunsmithertools-pistol-pal/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.stevejenkins.com/blog/tag/mk-ii/>