<https://forum.ironbutt.org/index.php?threads/my-first-bbg-quick-write-up-and-some-pictures.5066/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.ironbutt.org/index.php?threads/my-first-bbg-quick-write-up-and-some-pictures.5066/#post-65509>