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To build a data-integration system, the application designer must specify a mediated schema and supply the descriptions of data sources. A source description contains a source schema that describes the content of the source, and a map-ping between the corresponding elements of the source schema and the mediated schema. Manually constructing these map-pings is both labor-intensive and error-prone, and has proven to be a major bottleneck in deploying large-scale data integration systems in practice. In this paper authors report on the initial work toward automatically learning mappings between source schemas and the mediated schema.
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