<http://schema.org/dateModified>
"2016-10-11T15:54:37Z"^^<http://schema.org/Date>
<https://en-us.help.blackboard.com/Learn/Administrator/SaaS/Courses/010_Create_Courses/Export_Archive_and_Restore_Courses/Exporting_or_Archiving_from_Older_LMS>