What is a union-catalogue-ID and where can I find it?

The union-catalogue-ID is a unique identifier by which title information can be identified across different union catalogues. A union-catalogue-ID is comprised of two parts: the library consortium ISIL and the catalogue identifier.

• Example: DE-627 | 0410769649
• Example: DE-604 | BV036428792

You can find the catalogue identifier either in your local system or under “PPN” or "K10plus-PPN" in the catalogue of the GBV and SWB/under “Katalogschlüssel” (“catalogue key”) in the catalogue of the BVB/KOBV.
When searching for union-catalogue-IDs, you can conveniently select the preceding library consortium ISIL in the VW-LiS user interface:

• DE-627 = K10plus (GBV & SWB)
• DE-604 = B3Kat (BVB & KOBV)