Communicating sequential processes
Communicating sequential processes
Communication and concurrency
The Z notation: a reference manual
The Z notation: a reference manual
CSP-OZ: a combination of object-Z and CSP
FMOODS '97 Proceedings of the IFIP TC6 WG6.1 international workshop on Formal methods for open object-based distributed systems
Blending Object-Z and Timed CSP: an introduction to TCOZ
Proceedings of the 20th international conference on Software engineering
The Object-Z specification language
The Object-Z specification language
Specification, Refinement and Verification of Concurrent Systems—An Integration of Object-Z and CSP
Formal Methods in System Design
Refinement in Z and object-Z: foundations and advanced applications
Refinement in Z and object-Z: foundations and advanced applications
The Theory and Practice of Concurrency
The Theory and Practice of Concurrency
Refinement and Decomposition of Value-Passing Action Systems
CONCUR '93 Proceedings of the 4th International Conference on Concurrency Theory
A Semantic Integration of Object-Z and CSP for the Specification of Concurrent Systems
FME '97 Proceedings of the 4th International Symposium of Formal Methods Europe on Industrial Applications and Strengthened Foundations of Formal Methods
Structural Refinement in Object-Z/CSP
IFM '00 Proceedings of the Second International Conference on Integrated Formal Methods
Refinement and Verification of Concurrent Systems Specified in Object-Z and CSP
ICFEM '97 Proceedings of the 1st International Conference on Formal Engineering Methods
Programming with angelic nondeterminism
Proceedings of the 37th annual ACM SIGPLAN-SIGACT symposium on Principles of programming languages
ASM'03 Proceedings of the abstract state machines 10th international conference on Advances in theory and practice
Using constraints and process algebra for specification of first-class agent interaction protocols
ESAW'06 Proceedings of the 7th international conference on Engineering societies in the agents world VII
ACM SIGSOFT Software Engineering Notes
Compositional class refinement in object-z
FM'06 Proceedings of the 14th international conference on Formal Methods
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A number of integrations of the state-based specification language Object-Z and the process algebra CSP have been proposed in recent years. In developing such integrations, a number of semantic decisions have to be made. In particular, what happens when an operation's precondition is not satisfied? Is the operation blocked, i.e., prevented from occurring, or can it occur with an undefined result? Also, are outputs from operations angelic, satisfying the environment's constraints on them, or are they demonic and not influenced by the environment at all? In this paper we discuss the differences between the models, and show that by adopting a blocking model of preconditions together with an angelic model of outputs one can specify systems at higher levels of abstraction.