On Updating in XML Peer-to-Peer Databases

Distributed databases are increasingly used in many applica- tions and software systems. Peer-to-Peer databases are interesting part of distributed databases field. This type of distributed database man- agement system allows to connect stand-alone databases via a computer network. Connected databases cooperate on processing of their tasks with other connected databases. The peer-to-peer databases contains a lot of various distributed and repli- cated data in various forms. The correct data coordination is the crucial in peer-to-peer databases, it is necessary for correct processing of queries and other database requests. Our work is focused on updates in XML peer-to-peer databases. We provide a review of a peer-to-peer database management system architecture and problems related to implementa- tion of updates. Finally, we consider the requirements on semantic map- ping, the part of peer architecture responsible for correct reformulation of global query or update.