A Language Multidatabase System Communication Protocol

Rapid growth in the area of Multi Database Systems (MDBSs), which involve both the access of global data and distributed transaction processing, has created a need for programming languages that provide communication reliability and powerful synchronization. In this paper, we first present the requirements of MDBSs, then explain the V PL (Vienna Parallel Logic) programming language and its features, and finally illustrate how to realize an MDBS communication protocol in this language. V PL provides a concurrent logic language, as well as features of both distributed operating systems and database management systems. These features combine to support the communication and synchronization required by distributed transaction processing. VPL is suitable for use as a general-purpose distributed programming and coordination language