Seamless integration of applications in existing MIS environments is difficult because of specific differences in hardware and software characteristics. We investigate issues involved in deploying Ada based applications in standardized distributed environments. We focus mainly on transparent database access and transfer of complex objects between Ada programs across several hardware platforms utilizing multi-vendor DBMS products within the framework of the Open Software Foundation (OSF) / Distributed Computing Environment(DCE).
We present an Ada-based methodology for developing database applications. When using this methodology an application programmer needs to concern himself mairdy with high-level schema types and associated object declarations, while the access to the database k non-procedural, automatic, and through a small number of semantically well-defined subprogram calls. A prototype implementation of this methodology confirmed our expectationsregarding the easeof use, portability and high programmer productivity.
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