A DATABASE INTEGRATION SYSTEM AND AN EXAMPLE OF ITS APPLICATION

摘要

This paper describes and illustrates a prototype database integration system. The aim of the system is to enable interoperability at view level across a set of heterogeneous databases. The system operates as follows. Generic model types have been defined for the relational and object-oriented models. Applications based on these generic models are input to the system. The system translates each generic model into a canonical binary form. The next stage is to identify areas of overlap between the applications. This is achieved by creating a mapping model which identifies synonyms, homonyms and any required renam-ing. The canonical application models are then integrated to form a federated model. Finally, further sets of rules have been defined to support reverse translation from the integrated model to both of the paradigms.