Analyzing and Revising Data Integration Schemas to Improve Their Matchability

Data integration systems often provide a uniform query interface, called a mediated schema, to a multitude of data sources. To answer user queries, such systems employ a set of semantic matches between the mediated schema and the data-source schemas. Finding such matches is well known to be difficult. Hence much work has focused on developing semi-automatic techniques to efficiently find the matches. In this paper the authors consider the complementary problem of improving the mediated schema, to make finding such matches easier.