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

被引：7
|
作者：
Kern, Rafal [1 ]
Stolarczyk, Tomasz [1 ]
Ngoc Thanh Nguyen [1 ]
机构：
[1] Wroclaw Univ Technol, PL-50370 Wroclaw, Poland
来源：
EXPERT SYSTEMS WITH APPLICATIONS | 2013年 / 40卷 / 07期
关键词：
Warehouse federation; Schema integration; SQL query decomposition; Knowledge integration; RESOLUTION;
D O I：
10.1016/j.eswa.2012.10.060
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
A federation of data warehouses is understood as a set of data warehouses, which can be processed as a whole in the logic level. Physically, the federation does not gather data into one place. This paper presents a formal framework for data and knowledge processing in data warehouse federations. The management system for a data warehouse federation consists of an user interface enabling presentation of user queries, a program for query decomposition and a program for integrating knowledge coming from different data warehouses as the answers to a user query. We propose a model for query decomposition process and knowledge integration. It contains also the algorithm for knowledge inconstancy processing. This kind of inconsistency often occurs since very often the knowledge extracted from different data warehouses refers to the same subject, but is not consistent. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2592 / 2606
页数：15
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