132 страниц. 2012 год. LAP Lambert Academic Publishing A multi database consists of a collection of autonomous local databases. Systems used to manage multi databases are called multi database systems (MDBSs). In such a system global transactions are executed under the control of the MDBS. Independently local transactions are submitted directly to a local Database system (LDBS) by local applications. An Multi Database System should provide a mechanism to globally manage transactions. However global transactions are long- live and involve operation on multiple and autonomous local databases. Moreover MDBSs do not have any information about the existence and execution order of local transactions. The aim of this research is to propose a design that integrates three Heterogeneous multi databases with the same model relational but different software environments.