Institutions: abstract model theory for specification and programming
Journal of the ACM (JACM)
Using Explicit State to Describe Architechtures
FASE '99 Proceedings of the Second Internationsl Conference on Fundamental Approaches to Software Engineering
Guarded Transitions in Evolving Specifications
AMAST '02 Proceedings of the 9th International Conference on Algebraic Methodology and Software Technology
The Use of Static Constructs in A Modal Process Logic
Proceedings of the Symposium on Logical Foundations of Computer Science: Logic at Botik '89
Composition and Refinement of Behavioral Specifications
Proceedings of the 16th IEEE international conference on Automated software engineering
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The motivation for this work is to support a natural separation of concerns during formal system development. In a development-by-refinement context, we would like to be able to first treat basic functionality and normal-case behavior, and then later add in complicating factors such as physical limitations (memory, time, bandwidth, hardware reliability, and so on) and security concerns. Handling these complicating factors often does not result in a refinement, since safety or liveness properties may not be preserved. We extend our earlier work on evolving specifications (1) to allow the preservation of both safety and liveness properties under refinement, and (2) to explore a more general notion of refinement morphism to express the introduction of complicating factors.