This paper presents a minimal and complete set of structural refactoring rules for the Object-Z specification language that allow for the derivation of arbitrary object-oriented architectures. The rules are equivalence preserving and work in concert with existing class refinement theory, so that any design derived using the rule set can be shown to be equivalent to, or a refinement of, the orig...

It is shown how to make a transition from the Z formal notation [3] to the Business Object Notation (BON) [4]. It is demonstrated that BON has the expressive power of Z, with the additional advantages of object-orientation and a supporting seamless development method. The transition is illustrated for some widely used Z constructs. The translation lays the groundwork for a semi-automated tool f...

As a starting point for a hypermedia object model for the DejaVu project, we describe an object-oriented version of the Dexter hypertext reference model. While the original model was formally deened in the Z speciication language we will use Object-Z to formalize our hypermedia model.

We have been engaged in research towards designing a software system called LOZ for learning the object oriented formal specification notation Object-Z. Initially, we conducted a survey to analyse the effectiveness of traditional methodologies for learning Z notation. In LOZ, the semiformal model UML is used in the intermediate phase between informal textual description and formal Object-Z desc...

This paper presents a formalization using Object-Z of the State Machine package in the UML metamodel. In the specification, the abstract syntax and the static and dynamic semantics for each individual model construct in the package are grouped together and encapsulated within a single Object-Z class. For formalizing the dynamic semantics, a denotational semantics of the construct is first given...

Data hiding into text documents itself involves pretty complexities due to the nature of text documents. A robust text watermarking scheme targeting an object based environment is presented in this research. The heart of the proposed solution describes the concept of watermarking an object based text document where each and every text string is entertained as a separate object having its own se...

There has been an increasing emphasis on formality in software system speciication in the last few years. A number of standards bodies are recommending the use of formal notations for specifying software systems. Parallel and distributed systems have their own complex features such as: the concurrent interactions between various system components; the reactive nature of the systems; various mes...