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Leipzig: Wednesday, 30.04.2025

The reading rooms in the main building of the German National Library in Leipzig will close at 14:00 due to an event. The museum reading room, the music reading room and the service area are open until 18.00. The exhibitions of the German Museum of Books and Writing will open from 10:00 to 18:00.

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)

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