Towards a multi-scale approach for source code approximate match report

International audienceFinding exact clones in source code can be e ciently handled using classical exact substring or subtree pattern match- ing techniques inspired from genomics applications. These methods may be wisely employed as a foundation to sketch new techniques highlighting duplicated code chunks present- ing minor edits or more extensive modi cations at a higher structural scale. The main goal is to improve recall of small near matches and to aggregate them into larger ones to pro- vide a more global view of similarities with a reasonable complexity. These concerns are essential to be able to ad- dress a large database of source code projects