<https://www.ibookbinding.com/?attachment_id=20429>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.ibookbinding.com/tools/corner-cutting-jig/new-and-improved-version-of-our-corner-cutting-mitering-tool-and-why-to-use-it/attachment/20429/>