The Combined Regions Database provides bibliographic citation and location data for a wide range of local, regional and national library materials held by its members' libraries.
Regions contribute records and locations and in return receive the full database.
There is a rolling programme of loading the catalogues of participating libraries, academic, public and special. The ownership of records remains with the participating libraries and the data is made freely available among members on a reciprocal basis Unity contains over 10 million catalogue records and more than 35 million locations. It records the current holdings of books, music, audiovisual materials, newspapers, periodicals and special collections. Unity is currently updated quarterly and can be networked. Unity contains full MARC citations and a range of EMMA records.