<https://forum.audio.com.pl/topic/75654-dac-zewn%C4%99trzny-czy-zintegrowany/#comment-350423>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.audio.com.pl/topic/75654-dac-zewn%C4%99trzny-czy-zintegrowany/>