<https://forum.audio.com.pl/topic/79502-kolumny-do-jolida-1501rc-ok-3000-z%C5%82/#comment-396865>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.audio.com.pl/topic/79502-kolumny-do-jolida-1501rc-ok-3000-z%C5%82/?tab=comments#comment-396679>