The document discusses open bibliographic data and new business models for libraries. Currently, libraries purchase bibliographic data or catalog materials themselves, sometimes resulting in redundant cataloging. The author proposes making bibliographic data openly available under public domain licenses to encourage reuse and new services around data curation, mapping, and scanning tables of contents on demand. Key challenges include determining an appropriate license and transforming data into the Web of Data. Several libraries have begun sharing their catalog data as open data.