Bumping it and adding the requested informations at https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/Federated_queries/Allowlist :

• Dataset name : German National Library (Deutsche Nationalbibliothek - DNB)
• Dataset homepage : https://www.dnb.de/EN/Home/home_node.html
• SPARQL endpoint URL : https://sparql.dnb.de/api/gnd
• SPARQL web UI URL (if exists and known) : https://sparql.dnb.de
• Licensing information (if known) : CC0 1.0 license
• Short description of the dataset : the dataset include all the bibliographic titles held by the DNB as well as the Integrated Authority File (Gemeinsame Normdatei - GND), which describe persons, corporate bodies, conferences and events, geographic entities, topics and works relating to cultural and academic collections held by GLAM institutions throughout Germany ; more technical information can be foud at https://wiki.dnb.de/spaces/LINKEDDATASERVICE/pages/449878933/DNB+SPARQL+Service+BETA
• Example demonstrating how the dataset in the requested endpoint can be meaningfully linked to Wikidata : Wikidata entities already link to the GND using property P227 ; it is simple to reconstruct an useful URI in this SPARQL endpoint simply by supplying the formatter URL
• Summary of your project (if any) : as a librarian, I am interested in comparing Wikidata and the GND in order to find discrepancies in the data and correct them

Change #1226367 had a related patch set uploaded (by Ryan Kemper; author: Ryan Kemper):

[operations/puppet@production] wdqs: allowlist DNB

https://gerrit.wikimedia.org/r/1226367

Change #1226367 merged by Ryan Kemper:

[operations/puppet@production] wdqs: allowlist DNB

https://gerrit.wikimedia.org/r/1226367