(Please excuse cross postings.)

Ex Libris offers a service with Elsevier and OVID whereby a library's e-resource holdings can be updated automatically (weekly, monthly, or on demand) through fetching customized KBART files from the vendor.

I'm currently researching more about this process, which I have implemented successfully in our Alma system at University of Rhode Island. 

(Incidentally, ExLibris just noted in a blog post that NISO is working to set a standard for this process.)