Conversion method from UML activity graph to Event-B model

Abstract

The invention relates to a conversion method from a UML activity graph to an Event-B model, and belongs to the field of computer software engineering.The method comprises the steps that a model element of the UML activity graph is determined, wherein active objects, basic activities and activity flows are initiated; an object collection and an activity collection are established, invariant is established to ensure that each activity only belongs to one object, preconditions and post conditions of the activities are stated in event trigger conditions guards and actions respectively, and mapping is conducted on the activity flows which comprise a sequence flow, bifurcation and joint and branch and combination.According to the method, the UML active graph is converted into the Event-B model, formalized validation is conducted on a converted model through a modeling platform of an Event-B, and problems existing in a UML model can be found; meanwhile, for the problem that modeling is inconvenient for the Event-B serving as a formalized language, the method for assisting the Event-B in modeling by means of the ULML active graph is achieved.

Description

technical field [0001] The invention relates to the field of computer software engineering, and relates to a technology for converting UML models into formalized models, in particular to a conversion method from UML activity diagrams to Event-B models. Background technique [0002] UML, Unified Modeling Language, is a graphical language that supports modeling and software system development. UML models have actually become the standard in the modeling field, with stronger versatility and wider tool support. However, UML is a semi-formal language without precise semantics, and different people's understanding of UML models is likely to cause ambiguity. In addition, it is impossible to formally verify the UML model to ensure the correctness of the model. [0003] In order to solve these problems, there have been many works on how to convert UML models into formal models. In the reference [1], the researchers chose the high-order logic formal specification language PVS to for...

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Problems solved by technology

[0011] 1) Although the current common model transformation methods have their own advantages, they also have obvious shortcomings. For example, the semantics of B language and Z language are relatively complicated and difficult to understand; Z language lacks the support of corresponding model analysis tools; Petri In the face of complex models, there will be state space explosion problems, etc.;

[0012] 2) Many studies currently carried out only provide corresponding model transformation methods and security analysis methods for one or two types of diagrams in UML views, lacking more systematic and comprehensive research on UML views

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