Schemas Matching Approach Using the Functional Relations

Most of schema matching focuses on computing direct matches between two schemas. However the direct matching is rare. To make more effective schema matching, the indirect matching must utilize in matching processes. The indirect matching can be computed through the relations between schemas. For the indirect matching, ontology based approaches have studied. However, they do not consider the functional relation because the functional relations are difficult to obtain from schemas or ontologies. In this paper, we define the functional relations. And we present the schema matching approach using the functional relations.