Object migration in federated database systems

Existing federated database systems FDBS provide uniform access to multiple heteroge neous DBS but do not enable objects to move across the DBS while retaining global identity To ful ll this requirement of industrial users we incorporate into FDBS a exible object mi gration mechanism to move or duplicate objects from one component database system to another We present di erent capabilities for what and how to migrate and consider the migration of both single objects and whole object graphs i e an object together with related objects

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