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Traditionally, the design and implementation of a conventional database system begins with the selection of a data model, followed by the specification of a model-based data language. An alternative to this traditional approach to database system developement is the multi-lingual database system. This alternative approach affords the user the ability to access and manage a large collection of databases via several data models and their corresponding data languages. This thesis presents the specification and implementation of a hierarchical/DL/I language interface for the MLDS. Specificallly, it presents the specification and implementation of an interface which translate DL/I data language calls into attribute-based data language requests. The author describes the software engineerig aspects of the implementation and an overview of the four modules which comprise the DL/I language interface. Additional keywords: KMS (Kernel Mapping System). (Author)

Traditionally, the design and implementation of a conventional database system begins with the choice of a data model followed by the specification 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). The alternative approach affords the user the ability to access and manage a large collection of databases via several data models and their corresponding data languages. In this thesis we present the specification and implementation of a hierarchical/DL/I language interface for the MLDS. Specifically, we present the specification and implementation of an interfaces which translates DL/I data language calls into attribute-based data language (ABDL) requests. We describe the software engineering aspects of our implementation and an overview of the four modules which comprise our DL/I language interface.