K10plus

K10plus is the union catalog of the German library networks GBV (Common Library Network) and SWB (Southwest German Library Network). It combines the catalogs of the majority of academic libraries in Germany.

K10plus combines the former union catalogs of GBV and SWB covering 10 of 16 states of Germany, the Prussian Cultural Heritage Foundation and other research institutions such as those of Leibniz Association, Helmholtz Association and Max Planck Society. As of March 2023, K10plus contained around 80 million bibliographic records, representing over 200 million physical and digital library assets from more than 1000 libraries.^[1] Large parts of K10plus are exported regularly into WorldCat and make up roughly 10% of it.

K10plus-Zentral is an extension of K10plus with bibliographic data aggregated from other sources such as public libraries, PubMed, JSTOR, arXiv etc. As of March 2023, it contained around 231 million records.^[2][3] The database is run with Solr and can be integrated in various search portals.