<https://homemasters.ru/forums/topic/33948-rasstoyanie-ot-nizhnei-kromki-dveri-do-pola/#comment-391060>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://homemasters.ru/forums/topic/33948-rasstoyanie-ot-nizhnei-kromki-dveri-do-pola/>