<https://forums.iobit.com/topic/13278-send-your-feedback-for-smart-defrag-v4/page/11/#comment-97547>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forums.iobit.com/topic/13278-send-your-feedback-for-smart-defrag-v4/page/11/?tab=comments#comment-97631>