<https://logic-users-group.com/threads/mainstage-asks-for-my-serial-number-every-start-up.3255/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://logic-users-group.com/threads/mainstage-asks-for-my-serial-number-every-start-up.3255/#post-19376>