<https://www.v-twinforum.com/threads/what-to-do-on-top-end-of-shovel.67919/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.v-twinforum.com/threads/what-to-do-on-top-end-of-shovel.67919/#post-683266>