A formal framework for query decomposition and knowledge integration in data warehouse federations

► We propose a formal framework for the data warehouse federation layer. ► We build a general schema for the interaction process between users and the federation. ► We work out procedures for decomposing SQL user queries to sub-queries understandable for component data warehouses. ► We work out the...

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Veröffentlicht in:	Expert systems with applications 2013-06, Vol.40 (7), p.2592-2606
Hauptverfasser:	Kern, Rafał, Stolarczyk, Tomasz, Nguyen, Ngoc Thanh
Format:	Artikel
Sprache:	eng
Schlagworte:	Algorithms Applied sciences Computer science control theory systems Computer systems and distributed systems. User interface Data warehousing Decomposition Exact sciences and technology Expert systems Federations Information systems. Data bases Knowledge integration Management systems Memory organisation. Data processing Query processing Schema integration Software SQL query decomposition User interfaces Warehouse federation
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