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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.

Frankfurt am Main: Repair work telephone system

On 2 May, the Frankfurt site of the German National Library will be unavailable by telephone from 9.30 - 11.30 due to repair work.

What is a "recordIdentifier" with a ppn prefix in the SRU response?

This "recordIdentifier" is the German National Library’s internal identification number. It consists of the namespace “ppn” and the identification number in the format "ppn:940116162".
Explanation: The PPN/IDN is delivered in MARC field 001, for example 129602434.
As the interface is generally oriented, the SRU response always returns the German National Library's internal identification number – no matter which identifier was sent in the SRU request.

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