These proceedings record the papers presented at the second International Conference of B and Z Users (ZB2002), held on 23-25 January 2002 in the city of Grenoble in the heart of the French Alps. This conference built on the success of the rst con- rence in this series, ZB2000, held at the University ofYork in the UK. The location of ZB2002 in Grenoble re ects the important work in the area of formal methods carried out at the Laboratoire Logiciels Systemes ` Reseaux ´ within the Institut d'Informatique et Mathematiques ´ Appliquees ´ de Grenoble (LSR-IMAG), especially involving the B method. B and Z are two important formal methods that share a common conceptual o- gin; each are leading approaches applied in industry and academia for the speci cation and development (using formal re nement) of computer-based systems. At ZB2002 the B and Z communities were brought together to hold a second joint conference that simultaneously incorporated the 13th International Z User Meeting and the 4th Int- national Conference on the B method. Although organized logistically as an integral event, editorial control of the joint conference remained vested in two separate but c- perating program committees that respectively determined its B and Z content, but in a coordinated manner.

InhaltsangabeTheories, Implementations, and Transformations.- Incremental Proof of the Producer/Consumer Property for the PCI Protocol.- Controlling Control Systems: An Application of Evolving Retrenchment.- Checking Z Data Refinements Using an Animation Tool.- Encoding Object-Z in Isabelle/HOL.- Characters + Mark-up = Z Lexis.- Extraction of Abstraction Invariants for Data Refinement.- An Approach to Combining B and Alloy.- Software Construction by Stepwise Feature Introduction.- The Semantics of Circus.- Handling Inconsistencies in Z Using Quasi-Classical Logic.- Loose Specification and Refinement in Z.- On Using Conditional Definitions in Formal Theories.- A Theory of Generalised Substitutions.- Reinforced Condition/Decision Coverage (RC/DC): A New Criterion for Software Testing.- A Comparison of the BTT and TTF Test-Generation Methods.- A Formal Analysis of the CORBA Security Service.- Type Synthesis in B and the Translation of B to PVS.- "Higher-Order" Mathematics in B.- ABS Project: Merging the Best Practices in Software Design from Railway and Aircraft Industries.- Generalised Substitution Language and Differentials.- Communicating B Machines.- Synchronized Parallel Composition of Event Systems in B.- Global and Communicating State Machine Models in Event Driven B: A Simple Railway Case Study.- Verification of Dynamic Constraints for B Event Systems under Fairness Assumptions.- A Formal Model of the UML Metamodel: The UML State Machine and Its Integrity Constraints.- Coming and Going from UML to B: A Proposal to Support Traceability in Rigorous IS Development.