VVSL: a language for structured VDM specifications
Formal Aspects of Computing
Systematic software development using VDM (2nd ed.)
Systematic software development using VDM (2nd ed.)
The B-book: assigning programs to meanings
The B-book: assigning programs to meanings
An open extensible tool environment for event-b
ICFEM'06 Proceedings of the 8th international conference on Formal Methods and Software Engineering
A proposal for records in event-b
FM'06 Proceedings of the 14th international conference on Formal Methods
Supporting Reuse of Event-B Developments through Generic Instantiation
ICFEM '09 Proceedings of the 11th International Conference on Formal Engineering Methods: Formal Methods and Software Engineering
Applying Event-B atomicity decomposition to a multi media protocol
FMCO'09 Proceedings of the 8th international conference on Formal methods for components and objects
The Rodin formal modelling tool
FACS-FMI'07 Proceedings of the 2007th internatioanal conference on Formal Methods in Industry
CEE-SET'09 Proceedings of the 4th IFIP TC 2 Central and East European conference on Advances in Software Engineering Techniques
Proceedings of the 5th ACM SIGCHI symposium on Engineering interactive computing systems
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CDIS is a commercial air traffic information system that was developed using formal methods 15 years ago by Praxis, and it is still in operation today. This system is an example of an industrial scale system that has been developed using formal methods. In particular, the functional requirements of the system were specified using VVSL - a variant of VDM. A subset of the original specification has been chosen to be reconstructed on the Rodin platform based on the new Event-B formalism. The goal of our reconstruction was to overcome three key difficulties of the original formalisation, namely the difficulty of comprehending the original specification, the lack of any mechanical proof of the consistency of the specification and the difficulty of dealing with distribution and atomicity refinement. In this paper we elucidate how a new formal notation and tool can help to overcome these difficulties.