Priority-Based Conflict Resolution in Inconsistent Relational Databases

We study here the impact of priorities on conflict resolution in incon- sistent relational databases. We extend the framework of (1), which is based on the notions of repair and consistent query answer. We propose a set of postulates that an extended framework should satisfy and con- sider two instantiations of the framework: (locally preferred)l -repairs and (globally preferred)g-repairs. We study the relationships between them and the impact each notion of repair has on the computational complexity of repair checking and consistent query answers.