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dc.contributor.author Wan, Nga Ting Alex en_US
dc.date.accessioned 2007-05-15T15:25:33Z
dc.date.available 2007-05-15T15:25:33Z
dc.date.issued 1997-05-01T00:00:00Z en_US
dc.identifier.uri http://hdl.handle.net/1993/996
dc.description.abstract Services rendered by legacy systems that have evolved over decades are vital to many industries. Therefore, reengineering of these systems must ensure that the new systems provide the same functionalities as their ancestors, while exploiting new technologies. Reengineering involves reverse engineering an application from code to a higher level abstraction, and then reimplementing on a new platform. Ability to obtain the abstraction at requirements level enables maximum use of new development techniques and tools in reimplementation. Use of formal methods in specifying requirements helps eliminating unambiguity while enhancing confidence in consistency and correctness. This thesis presents a formal approach to reverse a program written in a C subset into a functional specification in Z notation, including (i) a description of the abstractions used in the reverse engineering process, (ii) a method to obtain these abstractions from a program written in a C subset, (iii) a method to derive the formal requirements specification from the abstractions, and (iv) a com arison of the logical strength of three sets of conditions to justify the correctness of the derived specification, as well as their application in reverse engineering. en_US
dc.format.extent 8339912 bytes
dc.format.extent 184 bytes
dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.language en en_US
dc.language.iso en_US
dc.title From code to requirements specification, reverse engineering using a formal approach en_US
dc.degree.discipline Computer Science en_US
dc.degree.level Master of Science (M.Sc.) en_US


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