Superdatabases for composition of heterogeneous databases

Superdatabases, which are designed to compose and extend databases, are discussed. In particular, superdatabases allow consistent update across heterogeneous databases. The general architecture of superdatabases is summarized, and some sufficient conditions to make the element databases composable are given. The design of a superdatabase capable of gluing the element databases together is described, and an implementation plan is sketched. Related work on many different aspects of heterogeneous databases is summarized and compared with the author´s study