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Abstract. Propagating changes from one place in a product line architecture (PLA) to another is a difficult problem that occurs in a variety of settings. Currently, no automated tools exist that help an architect in doing so, and performing the task by hand in the face of a large PLA can be error-prone and difficult. To address this problem, we have built a set of tools for automating the process. Our approach breaks down into a two-step solution: (1) automatically determining the difference between two selected (versions of) a product architecture, and (2) automatically merging the difference back into a different location in the original PLA. In this paper, we detail each of these two steps and evaluate our solution on an example word processor PLA.

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