On the derivation of executable database programs from formal specifications
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Achieving wide acceptance of formal methods in software development requires a smooth integration with requirements analysis, design and implementation. Especially for database application systems there exist well-known approaches to conceptual modeling as well as a sophisticated implementation technology on the basis of database programming languagues. The work described in this paper is based on a scenario, where the B method is coupled with a conceptual modeling language TDL and a database programming language DBPL. Both these languages can be represented in B. We concentrate on the problem of characterizing those B specifications that are sufficiently refined in order to be transformed into equivalent DBPL programs. This gives rise to some kind of implementability proof obligation.
Moreover, we show that the transformation itself can be regarded as a term rewriting task based on a representation by term algebras of the languages involved. For this task we exploit order-sorted algebra by using the OBJ system.
KeywordsFormal Method Proof Obligation Record Type Abstract Machine Final Machine
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