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Abstract. In the context of Model Engineering, work has focused on operations such as model validation and model transformation. By contrast, other model management operations of significant importance remain underdeveloped. One of the least elaborated operations is model merging. In this paper we discuss the special requirements of model merging and introduce the Epsilon Merging Language (EML), a rule-based language, with tool support, for merging models of diverse metamodels and technologies. Moreover, we identify special cases of model merging that are of particular interest and provide a working example through which we demonstrate the practicality and usefulness of the proposed language.

Abstract. In their recent book, Mens and Demeyer state that ModelDriven Engineering introduces additional challenges for controlling and managing software evolution. Today, tools exist for generating model editors and for managing models with transformation, validation, merging and weaving. There is limited support, however, for model migration -a development activity in which instance models are updated in response to metamodel evolution. In this paper, we describe Epsilon Flock, a modelto-model transformation language tailored for model migration that contributes a novel algorithm for relating source and target model elements.To demonstrate its conciseness, we compare Flock to other approaches.

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