<https://www.krebsforum.ch/forum3_de/viewtopic.php?f=104&amp;t=5946&amp;p=21521>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.krebsforum.ch/forum3_de/viewtopic.php?f=104&t=5946&p=21521>