Chain (MTC) generates applications from high level models that are defined in terms of problem domain concepts. The MTC produces a low-Ievel model that is rooted in the solution domain. An evolution problem arises when we need to include an unanticipated concern (e.g., security) to the generated applications. If there is a mismatch between the expressiveness of the high-Ievel metamodel and the new concern, then we need to adapt the existing asset...