Specification of real-time distributed database systems

Abstract

A unified framework is given for the specification of external consistency constraints, integrity constraints, and temporal consistency constraints of a real-time distributed database system. The formalism is event based and facilitates both relative and quantitative reasoning about time. The functional model of V.S. Alagar and G. Ramanathan (1991) is extended with constructs needed to specify the requirements of real-time databases. To illustrate the use of these constructs, the specification and proof of correctness of a real-time concurrency control protocol are presented.< >