Creating task-based concern maps by merging concern fragments

On any project, it is not possible to have complete and accurate concern maps for all possible tasks. We present an approach to create concern maps from available secondary software work artifacts produced by common software tools, such as revisions control. We mine and index concern fragments from repositories of those tools. Developers can search the index for an initial set of relevant fragments. To create a final concern map, the members from the initial set of fragments are validated, merged and expanded using a call graph. Members of the final concern map members are also ranked to guide developers to more relevant sections of the code.