Specification of abstract dynamic-data types: a temporal logic approach
Theoretical Computer Science - Special issue: algebraic development techniques
On the Frame Problem in Procedure Specifications
IEEE Transactions on Software Engineering
Using CASL to Specify the Requirements and the Design: A Problem Specific Approach
WADT '99 Selected papers from the 14th International Workshop on Recent Trends in Algebraic Development Techniques
HASCASL: Towards Integrated Specification and Development of Functional Programs
AMAST '02 Proceedings of the 9th International Conference on Algebraic Methodology and Software Technology
State-Based Extensions of CASL
IFM '00 Proceedings of the Second International Conference on Integrated Formal Methods
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We present DO-Casl, a new member of the CASL family of specification languages. It is an extension of Casl-Ltl and it supports a methodology for conveniently writing loose specifications of observers on dynamic sorts. The need for such constructs arose during the development of a CASL library for distributed systems. Indeed, we have frequently used the same pattern of specification, in order to solve a generalization of the frame problem while using observers. The constructs we propose make the resulting specifications more readable, concise and maintainable. The semantics of our extension is given by reduction to standard Casl-Ltl, which is, in turn, reducible to standard Casl whenever temporal logic is not used. A small prototype of the pre-processor from DO-Casl to Casl-Ltl has been implemented as well.