Implementation of a Entity-Relationship Interface for the Multi-Lingual Database System.

摘要

Traditionally, the design and implementation of a conventional database system begins with the choice of a data model followed by the specifications of a model-based data language. Thus, the database system is restricted to a single data model and a specific data language. An alternative to this traditional approach to database-system development is the multi-lingual database system (MLDS). This alternative approach enables the user to access and manage a large collection of databases via several data models and their corresponding data languages without the aforementioned restriction. This thesis presents the implementation of a entity-relationship/Daplex language interface for the MLDS. Specifically, it presents the implementation of an interface which translates Daplex language calls in to attribute-based data language requests. The authors describe the software engineering aspects of our implementation of an overview of the five modules which comprise our entity-relationship/Daplex language interface. (Author)