In conjunction with the Seventh International Conference on Coordination Models and Languages. This workshop is intended to bring together researchers who are actively engaged both in theoretical and practical aspects of database interoperability. The goal is to provide an effective forum for researchers in the area of database interoperability to exchange up-to-date technical knowledge and experience and to debate new issues and directions for research and development work in the future. IMPORTANT DATE : Paper submission:February 25, 2005 - Acceptance notification:March 20, 2005