The North Rhine-Westphalian Library Service Center (hbz) is a central service and development organization for university libraries in Northrhine-Westphalia and Rhineland-Palatinate. It was founded in 1973. At the center of hbz's services are the provision and management of a union catalog for university libraries and other libraries. Thus, you will find a lot of expertise in data aggregation, data normalization and provision of discovery interfaces within the hbz.
The hbz is active in the area of Open Access (OA) since 2002, beginning with hosting of institutional repositories and since 2004 with providing an OA journal platform Digital Peer Publishing (DiPP). Since many years hbz is actively promoting web standards and the open licensing of data published through libraries. hbz was one of the library organizations worldwide pioneering with opening up library data.