<https://blogs.swarthmore.edu/its/2012/04/23/blackboard-shut-down-and-moodle-training/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blogs.swarthmore.edu/its/2012/04/23/blackboard-shut-down-and-moodle-training/>