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EVA: a flexible programming method for evolving systems

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IEEE Transactions on Software Engineering, (1997)
DOI: 10.1109/32.588522

Аннотация

The authors' goal is to establish a flexible programming support for evolving systems that will enable one to modify programs using less labor, while maintaining good quality during service life. EVA (evolution mechanism for flexible agent) was developed to allow a flexible programming support system to be constructed based on their programming method for evolving systems. They consider that programming methods for evolving systems need to satisfy the following essential conditions. First, they need to make it easy to specify changes in a system in terms of new requirements. Second, they need to have a procedure for transmitting the new requirements to a program. Third, they need to be able to guarantee that the resultant program will meet the new requirements. Finally, because of the repetitive nature of much evolving systems work, they need to provide for the reuse of similar modifications during programming. In order to overcome limitations in program modification techniques which have only considered programming products, programming processes have been introduced into the method. To achieve their goal, they have formulated programming products and programming processes using such formal techniques as functional programming, type theory, modules, parameterized programming and natural deduction, and have constructed a mechanism of reusing these formal programming processes. The paper explains a case study which shows how to develop an evolving system using EVA and it discusses how one can use EVA's mechanism effectively.

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