VIP-MDBS: A Logic Multidatabase System

Abstract

We present a multidatabase management system built in Vienna Integrated Prolog (VIP) for cooperative management of autonomous databases. Data in different databases may differ with respect to naming, structures and value types. VIP-MDBS (VIP MultiDataBase System) allows the ability to manipulate them jointly and in a non-procedural way. Its features are similar to those of the relational multidatabase language MSQL, but adapted to logic programming. We introduce the concept of so-called semantic relations, a concept which stems from the extension of global views by deductiveness. VIP-MDBS allows for representation of intentional data and formulation of recursive multiple queries.