<https://forum.vectraklub.pl/topic/214536-19-dth-wyj%C4%99cie-silnika/#comment-3347890>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.vectraklub.pl/topic/214536-19-dth-wyj%C4%99cie-silnika/>