We need a way to exclude files from the summary that we don't care about. For example, we have a bunch of Test Code that is duplicated for every "device" we build. We would like to run CPD to improve the quality of our operational code, and therefore don't care about the results of test code. At least not now when it is masking the important stuff with over 1000 instances in test code. After we clean up all the operational code, then we can go back address test code. I'd like to be able to have DRY ignore (not display) certain files that match a pattern. Other plugins, like the Open Tasks plugin, have this feature already and it is very useful.