Communications of the ACM
Using Z: specification, refinement, and proof
Using Z: specification, refinement, and proof
Refactoring: improving the design of existing code
Refactoring: improving the design of existing code
Semantics and Transformations for UML Models
«UML» '98 Selected papers from the First International Workshop on The Unified Modeling Language «UML»'98: Beyond the Notation
«UML» '01 Proceedings of the 4th International Conference on The Unified Modeling Language, Modeling Languages, Concepts, and Tools
Reasoning with UML Class Diagrams
WIFT '98 Proceedings of the Second IEEE Workshop on Industrial Strength Formal Specification Techniques
Refactoring for generalization using type constraints
OOPSLA '03 Proceedings of the 18th annual ACM SIGPLAN conference on Object-oriented programing, systems, languages, and applications
Algebraic reasoning for object-oriented programming
Science of Computer Programming - Special issue on program transformation
A rigorous approach for proving model refactorings
Proceedings of the 20th IEEE/ACM international Conference on Automated software engineering
An Abstract Equivalence Notion for Object Models
Electronic Notes in Theoretical Computer Science (ENTCS)
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Both model and program refactorings are usually proposed in an ad hoc way because it is difficult to prove that they are sound with respect to a formal semantics. Even developers using refactoring tools have to rely on compilation and tests to guarantee the semantics preservation, which may not be satisfactory to critical software development. This work proposes a set of primitive structural semantics-preserving transformations for Alloy, a formal object-oriented modeling language. We use the Prototype Verification System (PVS), which contains a formal specification language and a theorem prover, to specify and prove the soundness of the transformations. Although our transformations are primitive, we can compose them in order to derive coarse grained transformations, such as a model refactoring to introduce a design pattern into a model. Moreover, proposing refactorings in this way can not only facilitate design, but also improve the quality of model refactoring tools.