Interoperability of distributed information system

A distributed information system includes autonomous database systems interconnected by communication networks. The system has to provide the interoperability among the database systems for users. In this paper, the interoperability means that users can define dynamically their views on multiple database systems. The classical distributed database systems aim at providing services where users can use multiple database systems without being conscious of their heterogeneity and distribution. Also, it is assumed that each database system can accept operations from users if the operations are authorized by the security constraint. Each database system has some autonomy, i.e. can decide what and how it can do for each operation. This paper discusses how to provide the interoperability on autonomous database systems