Yet Another Matcher

Discovering correspondences between schema elements is a crucial task for data integration. Most matching tools are semi-automatic, e.g. an expert must tune some parameters (thresholds, weights, etc.). They mainly use several methods to combine and aggregate similarity measures. However, their quality results often decrease when one requires to integrate a new similarity measure or when matching particular domain schemas. This paper describes YAM (Yet Another Matcher), which is a matcher factory. Indeed, it enables the generation of a dedicated matcher for a given schema matching scenario, according to user inputs. Our approach is based on machine learning since schema matchers can be seen as clas-sifiers. Several bunches of experiments run against matchers generated by YAM and traditional matching tools show how our approach (i) is able to generate the best matcher for a given scenario and (ii) easily integrates user preferences, namely recall and precision tradeoff.