<https://www.electronics-lab.com/community/index.php?/topic/22260-tlit-switch/#comment-89889>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.electronics-lab.com/community/index.php?/topic/22260-tlit-switch/&tab=comments#comment-90002>