The goal of data integration systems is to provide a uniform access to a set of heterogeneous data sources. These sources can differ on the data model (relational, hierarchical, semi-structured), on the schema level, or on the query-processing capabilities. In a data integration architecture, these sources are queried by using a global schema, also called mediated schema, which provides a virtual view of the underlying sources.
Book chapter in Encyclopedia of Big Data Technologies, Springer, 2018, Editors: Sherif Sakr, Albert Zomaya
© Springer. Personal use of this material is permitted. The definitive version of this paper was published in Book chapter in Encyclopedia of Big Data Technologies, Springer, 2018, Editors: Sherif Sakr, Albert Zomaya and is available at : https://doi.org/10.1007/978-3-319-63962-8_6-1
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