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• 10:07, 7 February 2026 Wf talk contribs created page OBDA (Created page with "<pre> In OBDA, a conceptual layer is provided in the form of an ontology that defines a shared vocabulary, models the domain, hides the struc- ture of the data sources, and enriches incomplete data with background knowledge. Then, queries are posed over this high-level conceptual view, and the users no longer need an understanding of the data sources, the relation between them, or the encoding of the data. Queries are translated by the OBDA system into queries over pote...")