Priority-Based Conflict Resolution in Inconsistent Relational Databases

We study here the impact of priorities on conflict resolution in inconsistent 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 consider 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.