Formal Transformation of UML Diagram: Use Case, Class, Sequence Diagram with Z Notation for Representing the Static and Dynamic Perspectives of System
2016
The two most critical phases of SDLC are the specification and the designing phase as they involve the transformation of the semantics from real world domain to computer software systems. Unified Modelling Language (UML) has been accepted as blue print for design and specification of software critical systems. But, UML structures have the weakness in preciously defining the semantics of a system. Any misinterpretation in safety critical system’s specification may risks loss of lives. Formal methods are mathematical tools and techniques which are proven very adequate, principally, at requirement specification and design level. However, formal methods are not welcomed because of rigorous use of mathematics. Therefore, a bridge is required between UML and formal methods to overcome the above insufficiencies. The endeavour of this paper is to propose a new approach by integrating UML and Z notation, a formal specification language. The main focus of this paper is on transforming the UML diagram: use case diagram, class diagram and sequence diagram to Z Schema for capturing both the syntax and semantics, particularly for safety critical system. The resultant formal model of the approach are analyzed and verified by using Z/Eves tool.
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