ZUM '98: The Z Formal Specification Notation

1. Front Matter

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2. Industrial Issues

   1. Industrial Requirements for the Efficient Development of Reliable Embedded Systems

      • Klaus Grimm

      Pages 1-4

3. Concurrency

   1. How to Combine Z with a Process Algebra

      • Clemens Fischer

      Pages 5-23

   2. The Specification and Refinement of an Environmental Model

      • Bill Stoddart

      Pages 24-41

   3. Formal Derivation of Finite State Machines for Class Testing

      • Leesa Murray, David Carrington, Ian MacColl, Jason McDonald, Paul Strooper

      Pages 42-59

4. Tools

   1. Using B to Specify, Verify and Design Hardware Circuits

      • Ib Holm Sørensen

      Pages 60-65

   2. Z on the Web Using Java

      • Jonathan P. Bowen, David Chippington

      Pages 66-80

   3. Visualizing Z Notation in HTML Documents

      • Paolo Ciancarini, Cecilia Mascolo, Fabio Vitali

      Pages 81-95

5. Z and HOL

   1. On the Semantic Relation of Z and HOL

      • Thomas Santen

      Pages 96-115

   2. HOL-Z in the UniForM-Workbench – A Case Study in Tool Integration for Z

      • C. Lüth, E. W. Karlsen, ( ) Kolyang, S. Westmeier, B. Wolff

      Pages 116-134

6. Safety-Critical and Real-Time Systems

   1. Designing a Requirements Specification Language for Reactive Systems

      • Nancy G. Leveson

      Pages 135-135

   2. Analyzing a Real-Time Program with Z

      • Jonathan Jacky

      Pages 136-153

7. Semantic Theory

   1. Recursive Definitions in Z

      • R. D. Arthan

      Pages 154-171

   2. A Logic for the Schema Calculus

      • Martin C. Henson, Steve Reeves

      Pages 172-191

8. Theory and Standards

   1. Combining Specification Techniques for Processes, Data and Time

      • Ernst-Rüdiger Olderog

      Pages 192-192

   2. Innovations in the Notation of Standard Z

      • Ian Toyn

      Pages 193-213

9. Reasoning and Consistency Issues

   1. Comparing Extended Z with a Heterogeneous Notation for Reasoning about Time and Space

      • Richard F. Paige

      Pages 214-232

   2. Inconsistency and Undefinedness in Z – A Practical Guide

      • Samuel H. Valentine

      Pages 233-249

10. Refinement

    1. Compositional Specification of Controllers for Batch Process Operations

       • K. Lano, P. Kan, A. Sanchez

       Pages 250-264

    2. Testing Refinements by Refining Tests

       • John Derrick, Eerke Boiten

       Pages 265-283

1 In a number of recent presentations – most notably at FME’96 –oneofthe foremost scientists in the ?eld of formal methods, C.A.R. Hoare,has highlighted the fact that formal methods are not the only technique for producing reliable software. This seems to have caused some controversy,not least amongst formal methods practitioners. How can one of the founding fathers of formal methods seemingly denounce the ?eld of research after over a quarter of a century of support? This is a question that has been posed recently by some formal methods skeptics. However, Prof. Hoare has not abandoned formal methods. He is reiterating, 2 albeitmoreradically,his1987view thatmorethanonetoolandnotationwillbe requiredinthepractical,industrialdevelopmentoflarge-scalecomplexcomputer systems; and not all of these tools and notations will be, or even need be, formal in nature. Formalmethods arenotasolution,butratheroneofaselectionoftechniques that have proven to be useful in the development of reliable complex systems, and to result in hardware and software systems that can be produced on-time and within a budget, while satisfying the stated requirements. After almostthree decades,the time has come to view formalmethods in the context of overall industrial-scale system development, and their relationship to othertechniquesandmethods.Weshouldnolongerconsidertheissueofwhether we are “pro-formal” or “anti-formal”, but rather the degree of formality (if any) that we need to support in system development. This is a goal of ZUM’98, the 11th International Conference of Z Users, held for the ?rst time within continental Europe in the city of Berlin, Germany.

• Formal Methods
• Formal Specification
• Java
• Safety-Critical Systems
• Systems Verification
• Unified Modeling Language (UML)
• Z Notation
• embedded systems
• logic
• object
• real-time

• Department of Computer Science Whiteknights, The University of Reading, Reading, Berks, UK

  Jonathan P. Bowen

• Software Technology Laboratory, Daimler-Benz AG, Research and Technology, Berlin, Germany

  Andreas Fett

• Department of Computer Science, Loyola College in Maryland, Baltimore, USA

  Michael G. Hinchey