Applying Cased-based reasoning (CBR) method in program understanding provides a practical route towards more powerful software engineering technology. A CBR approach to the recognition of model component is presented, and the whole reasoning process of the recognition is presented, including a case representation method and a matching algorithm. A prototype system named Process Model Component Recognition & Reuse (PMCRR) is developed to implement model transformation and reconstruction. At last ,an example is illustrated to check the efficiency of CBR method.
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