Abstract
It is possible with RAISE to specify and do most refinement in an applicative framework, and then transform the concrete applicative specification into an imperative sequential or concurrent one. This is a change from a style more appropriate to proof of refinement to a style more appropriate to implementation.
The resulting imperative specification is typically hierarchical, with upper levels calling the functions of lower ones. This paper presents a further stage of development in which the hierarchical structure is transformed into a distributed one, and components communicate asynchronously. This also allows “horizontal” communication between components of previously separate hierarchies.
A major design aim is to reuse the hierarchical specification, as far as possible extending the existing modules by standard, generic components. The method should achieve correctness by construction, and be amenable to quality control; it is an example of an engineering approach using standard components and standard assembly techniques.
The method is illustrated by collaborative work done between UNU/IIST and the Vietnamese Ministry of Finance in developing a specification of a national financial information system.
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George, C., Dũng, Đ.T. (1998). Combining and Distributing Hierarchical Systems. In: Broy, M., Rumpe, B. (eds) Requirements Targeting Software and Systems Engineering. RTSE 1997. Lecture Notes in Computer Science, vol 1526. Springer, Berlin, Heidelberg. https://doi.org/10.1007/10692867_6
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DOI: https://doi.org/10.1007/10692867_6
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