<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/ListItem>
<https://en-us.help.blackboard.com/Learn/9.1_Older_Versions/9.1_SP_12_and_SP_13/Administrator/010_Release_Notes/020_SP_12_Release_Notes/000_SP_12_New_Features/Content_Editor>