The SUNY Potsdam College Libraries employs a SUNY-wide information management system called ALMA/Primo (which you might know as BearCat, QuickSearch or Book Search). ALMA/Primo stores our online catalog records (also known as metadata) along with acquisitions and circulation data. The catalog records are owned collectively and shared among 64 SUNY campuses. When several SUNY campuses own the same book, ALMA/Primo has just one copy of the catalog record which is shared amongst all the campuses and displayed in our separate online catalogs. This means we can't do a whole lot of local customization (such as add subject terms or tags to help locate book on diversity topics), as the catalog records are not owned just by SUNY Potsdam and system-wide policies on editing shared records prohibits us from making changes that would affect other campuses.
When we migrated to the new system (ALMA/Primo) in 2019, catalog records were downloaded from WorldCat, a union catalog listing billions of items held by libraries across the world. The ALMA/Primo catalog records are refreshed on a weekly basis. When the records on WorldCat are corrected or updated, they are automatically exported again into ALMA/Primo, overlaying existing records and ensuring that our catalog is up to date and somewhat accurate. This also means that custom edits we might make to a catalog record are essentially wiped clean when records are refreshed.
While creating local terms IS possible in our current system, the magnitude of the problems inherent in library systems make maintaining local practices impractical.