Relational Peer Data Sharing Settings and Consistent Query Answers
In this paper, the authors study the problem of consistent query answering in peer data sharing systems. In a peer data sharing system, databases in peers are designed and administered autonomously and acquaintances between peers are established thorough data sharing constraints. Since data are managed in peer databases autonomously, peers' data may be inconsistent with respect to the data sharing constraints. Inconsistencies of data may also result due to the change of constraints (e.g. adding, modifying, and deleting constraints between peers).