Two different approaches have been traditionally considered for dealing with the process of integrity constraints enforcement: integrity checking and integrity maintenance. However, while previous research in the first approach has mainly addressed efficiency issues, research in the second approach has been mainly concentrated in being able to generate all possible repairs that falsify an integ...

Integrity Maintenance is considered one of the major application elds of rule triggering systems (RTSs). In the case of a given integrity constraint being violated by a database transition these systems trigger repairing actions. However, it has be shown that for any set of constraints there exist unrepairable transitions, which depend on the closure of the constraint set. This implies that int...

A data integration system provides transparent access to different data sources by suitably combining their data, and providing the user with a unified view of them, called global schema. However, source data are generally not under the control of the data integration process, thus integrated data may violate global integrity constraints even in presence of locally-consistent data sources. In t...