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7 CONCLUSION
Model-driven software engineering reduces develop-
ment effort by replacing low-level programming with
the construction of high-level models. To make
these models executable, structural modeling has to
be complemented with behavioral modeling. During
their lifetime, models undergo many changes for a va-
riety of different reasons. Thus, it is crucial to sup-
port model evolution. Refactoring of models provides
an important contribution to model evolution since it
aims at restructuring models such that future changes
are facilitated.
In this paper, we presented tool support for model
refactoring in the ModGraph environment. Mod-
Graph employs Ecore models for structural modeling
and graph transformation rules for behavioral mod-
eling. Refactorings are supported in an integrated
way: Each refactoring transformation on the struc-
tural model is consistently propagated into the be-
havioral model. In this way, our work goes con-
siderably beyond previous work on model refactor-
ing which was confined to the refactoring of the
structural model. Furthermore, while several other
approaches use graph transformations for refactor-
ing (i.e., refactoring with graph transformations), our
work is unique inasmuch as it addresses refactoring
for graph transformations, as well.
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