<https://forum.gitarnorge.no/topic/18862-tomme-h%C3%B8yttaler-kabinett/#comment-284281>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.gitarnorge.no/topic/18862-tomme-h%C3%B8yttaler-kabinett/>