The subject area is missing an attribute for determining if the reading list is associated with a course.
subject area: course reserves
With this attribute users can identify reading lists that have not been properly attached to a course (associated) or may no longer be used, and is important when completing work to rollover the course/reading list.
From the IGeLU-ELUNA Analytics Working Group, Analytics Evidence Document
Please send questions or comments to the Analytics Working Group Listserv