|Authors||S. Nejati, M. Sabetzadeh, M. Chechik, S. Easterbrook and P. Zave|
|Title||Matching and Merging of Variant Feature Specifications|
|Afilliation||Software Engineering, Software Engineering, Software Engineering|
|Project(s)||The Certus Centre (SFI)|
|Publication Type||Journal Article|
|Year of Publication||2012|
|Journal||IEEE Transactions on Software Engineering|
Model Management addresses the problem of managing an evolving collection of models, by capturing the relationships between models and providing well-defined operators to manipulate them. In this article, we describe two such operators for manipulating feature specifications described using hierarchical state machine models: Match, for finding correspondences between models, and Merge, for combining models with respect to known or hypothesized correspondences between them. Our Match operator is heuristic, making use of both static and behavioural properties of the models to improve the accuracy of matching. Our Merge operator preserves the hierarchical structure of the input models, and handles differences in behaviour through parameterization. This enables us to automatically construct merges that preserve the semantics of hierarchical state machines. We report on tool support for our Match and Merge operators, and illustrate and evaluate our work by applying these operators to a set of telecommunication features built by AT&T.