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We address the problem of generating a mediated schema from a set of relational data source schemas and conjunctive queries that specify where those schemas overlap. Unlike past approaches that generate only the mediated schema, our algorithm also generates view definitions, i.e., source-to-mediated schema mappings. Our main goal is to understand the requirements that a mediated schema and views should satisfy, such as completeness, preservation of overlapping information, normalization, anddoi:10.1145/1353343.1353357 dblp:conf/edbt/PottingerB08 fatcat:lhqbvnbnsnelzcaqbi5vpmlnaa