Database Reference
In-Depth Information
Chapter 11
Construction and Maintenance
of Heterogeneous
Data Warehouses
M. Badri
Crip5 Université Paris Descartes, France & Lipn Université Paris Nord, France
F. Boufarès
Lipn Université Paris Nord, France
S. Hamdoun
Lipn Université Paris Nord, France
V. Heiwy
Crip5 Université Paris Descartes, France
K. Lellahi
Lipn Université Paris Nord, France
ABSTRACT
The data necessary to decisional ends are increasingly complex. They have heterogeneous formats and
come from distributed sources. They can be classified in three categories: the structured data, the semi-
structured data and unstructured data. In this work, we are interested in the field of data integration with
the aim of construction and maintenance of warehouses whose sources are completely heterogeneous
and belonging to the various categories. We propose a formal framework based on the definition of an
integration environment. A set of “integration relationships” between the components of the sources is
thus defined: an equivalence relation and a strict order relation. These relationships are independent
of any data sources modelling. These last can be then heterogeneous and having different models and/
or categories. Two different physical architectures, to create and maintain the warehouses and the ma-
terialized views, are given.
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