The last decade has experienced a growing interest of researchers in the problem of managing large process model collections. A plethora of approaches, techniques, and tools have been proposed that investigate this problem and provide solutions to it from different perspectives and degrees of depth. For example, work has been done to query a repository of process models for similarities or exact matches; to consolidate a set of similar process models into a merged model or via shared sub-processes; to simplify a repository based on various refactor-ing opportunities; and to visualize relations between process models or variants thereof.
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