<https://forum.universal-devices.com/topic/29750-5-year-old-plm-v21-is-it-time-to-replace-it/#comment-288667>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.universal-devices.com/topic/29750-5-year-old-plm-v21-is-it-time-to-replace-it/>