<https://jpsoft.com/forums/threads/md-rd-sometimes-causing-tcc-to-lockup.2409/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/DiscussionForumPosting>
<https://jpsoft.com/forums/threads/md-rd-sometimes-causing-tcc-to-lockup.2409/>