title: Language and tool support for class and state machine refinement in UML-B
creator: Said, Mar Yah
creator: Butler, Michael
creator: Snook, Colin
subject: Refinement
subject: Other
description: UML-B is a ?UML-like? graphical front end for Event-B that provides support for object-oriented modelling concepts. In particular, UML-B supports class diagrams and state machines, concepts that are not explicitly supported in plain Event-B. In Event-B, refinement is used to relate system models at different abstraction levels. The same abstraction-refinement concepts can also be applied in UML-B. This paper introduces the notions of refined classes and refined state machines to enable refinement of classes and state machines in UML-B. Together with these notions, a technique for moving an event between classes to facilitate abstraction is also introduced. Our work makes explicit the structures of class and state machine refinement in UML-B. The UML-B drawing tool and Event-B translator are extended to support the new refinement concepts. A case study of an auto teller machine (ATM) is presented to demonstrate application and effectiveness of refined classes and refined state machines.
publisher: Springer
date: 2009-11
type: Conference or Workshop Item
type: PeerReviewed
relation: http://eprints.soton.ac.uk/268268/
identifier:   Said, Mar Yah and Butler, Michael and Snook, Colin  (2009) Language and tool support for class and state machine refinement in UML-B.  In: Formal Methods 2009, November 2009, Eindhoven.     
relation: http://deploy-eprints.ecs.soton.ac.uk/434/

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