Active objects have their own thread of control and passive objects are controlled by others. In Object-Z, all objects are modelled as passive objects. Timed Communicating Object Z (TCOZ) extends the Object-Z notation with Timed CSP’s process and timing constructs. The blending of the concepts of object and non-terminating process leads to the notion of active object in TCOZ. This paper conside...

developing reliable yet flexible software is a hard problem. although modeling methods enjoy a lot of advantages, the exclusive use of just one of them, in many cases, may not guarantee the development of reliable and flexible software. formal modeling methods ensure reliability because they use a rigorous approach to software development. however, lack of knowledge and high cost practically fo...

This paper presents a model for object-oriented operations in which operations consist of two parts: an internal state transition and an external interaction with other objects. We first present a simple version of the two part model, and explain how this model has been used to develop a strictly modular, compositional semantics for a simple sub-language of Object-Z. Differences between the ope...

Real-Time Object-Z is an integration of the object-oriented formal specification language Object-Z with a timed trace notation suitable for modelling timing constraints and continuous variables. This extends the applicability of Object-Z to real-time and embedded systems. In this paper, we enhance the ability of Real-Time Object-Z to specify concurrent real-time and embedded systems by semantic...

The importance of formalising the speciication of standards has been recognised for a number of years. This paper advocates the use of the formal speciication language Object-Z in the deenition of standards. Object-Z is an extension to the Z language speciically to facilitate speciication in an object-oriented style. First, the syntax and semantics of Object-Z are described informally. Then the...

The importance of formalising the speciication of standards has been recognised for a number of years. This paper advocates the use of the formal speciication language Object-Z in the deenition of standards. Object-Z is an extension to the Z language speciically to facilitate speciication in an object-oriented style. First, the syntax and semantics of Object-Z are described informally. Then the...

refinement in z and object z foundations and advanced refinement in z and object-z university of kent formal approaches to computing and information technology advanced network refinement in z and object-z formal intermediate accounting study guide vol ii volume 2 ebook bash pocket reference author arnold robbins may 2010 ebook wave theory and applications alongs 2008 honda pilot user manual eb...

This paper addresses two issues: how formal object modeling techniques facilitate the XML application development and how XML technology helps formal/graphical software design process. In particular, the paper presents a XML/XSL approach to the development of a web environment for Z family languages (Z/Object-Z/TCOZ). The projection techniques and tools from object-oriented Z (in XML) to UML (i...

Although concurrency is essentially an implementation issue, it is often advantageous to specify a system in terms of its concurrent components. In this paper we examine the speciication of concurrent systems using Object-Z. Object-Z is an extension to the formal speciication language Z which supports an object-oriented speciication style. The use of Object-Z is illustrated through two case stu...

This paper describes a method for speciication-based class testing that incorporates test case generation, execution, and evaluation based on formal speciications. This work builds on previous achievements in the areas of speciication-based testing and class testing by integrating the two within a single framework. The initial step of the method is to generate test cases for individual operatio...