LIBRIS is a national search service with information on titles in Swedish university, college and research libraries and some twenty public libraries. There are books, journals, articles, maps, posters, sheet music, electronic resources, etc.

The database of bibliographic information is available via several APIs, and in multiple formats. The conceptual model is based on international open standards. Through RDF / XML the LIBRIS database is also moving towards becoming part of the Semantic Web.

In addition to providing raw data in open formats it is also possible for site owners to easily add search box widgets on their own site.

Data source: http://libris.kb.se/ (Swedish Royal Library)
Formats: RDF, XML, through API's
LIBRIS blog: http://blog.libris.kb.se/librisutv/

Found via http://www.opengov.se/data/6/ by Peter Krantz.