There is no attribute to extract the URL for a given citation/item, in a human readable format. 

status: in process
priority: high
subject area: course reserves

Use case:

Users want to be able to get a listing, especially of external websites, for copyright vetting purposes as well as establishing resources from a given publisher are being used for the purposes of managing cancellations or changes to subscriptions.

Ex Libris Response:

Full URL has been added to the Portfolio and E-Collection from December 2018. But Ex Libris will investigate to see if the URL is available in course reserves for the full citation URL and report back its findings to the group.

From the IGeLU-ELUNA Analytics Working Group, Analytics Evidence Document

Please send questions or comments to the Analytics Working Group Listserv