Web Service Choreography Description Language (WS-CDL) describes and orchestrates the services interactions among multiple participants. WS-CDL verification is essential since the interactions would lead to mismatches. Existing works verify the messages ordering, the flow of messages, and the expected results from collaborations. In this paper, we present a Z specification of WS-CDL. Besides ve...

Formal specification techniques provide precise and analyzable software specifications. However, formal notations provided by most formal specification techniques are not easy to use and understand for most people. Our approach counters this difficulty by visualizing formal specifications. In this paper, we use various diagrams to visualize a Z specification. In our work both static and dynamic...

Formal specifications use mathematical notations to precisely describe what properties a system need to have instead of how these properties are implemented. The Z notation is a formal specification language widely used in Europe. In this paper, we use the Z notation to analyze the temporal knowledge underlying a multimedia presentation. We then present a system based on the four temporal speci...

This paper uses formal methods to improve the security of the ecommerce system specifications and reduce the number of security threats to the minimum. The result shows the effectiveness of using formal methods for empowering ecommerce security. Z specification language is used to design the e-commerce system & specify security constraints. Besides, Z/EVES formal methods tool is considered for ...

In the thesis an approach to the formal specification of interactive systems which embodies a number of pragmatic criteria is presented. The criteria we use for pragmatism are that any proposed approach to specification should directly support usability reasoning, that the specifications should be expressive, and that they should be reusable. We examine the concept of usability reasoning, and u...

Formal modeling techniques can be used to define and verify software architectures precisely. This paper applies the recently developed integrated formal specification technique, Timed Communicating Object Z (TCOZ), to the generic software architecture modeling and verification.

Formal specifications are now being used as a basis for communication, design, testing and verification of a software product. For a formal specification to be used effectively, it must be valid, which means that it must be well-formed and reflects the user requirements. The normal technique for validating a formal specification is by using formal reasoning. However, the use of formal reasoning...