This book presents a coherent suvey on exciting developments in database semantics. The nine revised full papers and surveys presented were carefully reviewed for inclusion in the book. object-orientation, incomplete information, database transformations and other issues are investigated by applying formal semantics, e.g.

An informal and efficient approach for obtaining semantic constraints using sample data and natural language processing.- Achievements of relational database schema design theory revisited.- Semantics of database transformations.- The evolving algebra semantics of class and role hierarchies.- Semantics in spatial databases.- The additivity problem for data dependencies in incomplete relational databases.- A semantics-based approach to design of query languages for partial information.- Constraint databases: A survey.- Redundancy elimination and a new normal form for relational database design.