Semantic Replication in Mobile Federated Information Systems

Mobile information systems integrating information from d ifferent sources and feed mobile clients represent a big challenge fo r todays DBMS technology. Due to the limited capabilities of the clients (avai lable memory, usable bandwidth, temporary disconnections etc.) traditional re plication approaches known from distributed databases fail. In this paper we present an approach for data replication that considers the mobility of clients: The dat a sets which have to be replicated to mobile clients depend often on dynamic parame ters like location of the client or time. Therefore, we introduce a generic model f or specifying fragments of the global database with respect to such parameters .