NDLI: Structural Refinement of Systems Specified in Object-Z and CSP

Content Provider	Springer Nature Link
Author	Derrick, John Smith, Graeme
Copyright Year	2003
Abstract	This paper is concerned with methods for refinement of specifications written using a combination of Object-Z and CSP. Such a combination has proved to be a suitable vehicle for specifying complex systems which involve state and behaviour, and several proposals exist for integrating these two languages. The basis of the integration in this paper is a semantics of Object-Z classes identical to CSP processes. This allows classes specified in Object-Z to be combined using CSP operators. It has been shown that this semantic model allows state-based refinement relations to be used on the Object-Z components in an integrated Object-Z/CSP specification. However, the current refinement methodology does not allow the structure of a specification to be changed in a refinement, whereas a full methodology would, for example, allow concurrency to be introduced during the development life-cycle. In this paper, we tackle these concerns and discuss refinements of specifications written using Object-Z and CSP where we change the structure of the specification when performing the refinement. In particular, we develop a set of structural simulation rules which allow single components to be refined to more complex specifications involving CSP operators. The soundness of these rules is verified against the common semantic model and they are illustrated via a number of examples.
Starting Page	1
Ending Page	27
Page Count	27
File Format	PDF
ISSN	09345043
Journal	Formal Aspects of Computing
Volume Number	15
Issue Number	1
e-ISSN	1433299X
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-01-01
Publisher Place	London
Access Restriction	Subscribed
Subject Keyword	ensp; Integrated formal methods; Object-Z; CSP; Refinement
Content Type	Text
Resource Type	Article
Subject	Theoretical Computer Science Software

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