Periodicals metadata available under CC0 1.0
The majority of the metadata in the German Union Catalogue of Serials (ZDB) have been available under "Creative Commons Zero (CC0 1.0)" conditions since June 2014. This means that roughly 1.7 million bibliographic data in all languages and with no time restrictions have been approved for further use along with more than 13 million library ownership data. The approval explicitly includes commercial use. This step makes it possible for everyone to re-use the high quality metadata of the largest database of title and ownership data for serial publications, i.e. for journals, newspapers, serials and other periodically issued publications in printed and electronic form.
Responsibility for operation and further development of the ZDB lies jointly with the Staatsbibliothek zu Berlin - Preußischer Kulturbesitz and the German National Library.
For over a century now the German National Library has been collecting, documenting, archiving and making publicly available all written, graphic and sound recording publications issued in Germany, or in German, since 1913. The amendment of the Law regarding the German National Library (DNBG), introduced in 2006, expanded the collection mandate to include non-physical media publications (online publications).
The German Union Catalogue of Serials is one of the largest databases of title and library ownership data for serial publications, i.e. for journals, newspapers, serials and other publications issued periodically in printed, electronic or other form. It covers more than 1.7 million titles in all languages from 1500 to the present day along with more than 13 million ownership data for these titles from approximately 4400 German and Austrian libraries.