| ISBN: 978-1-880843-65-9
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| |
| description |
This paper presents an approach to provide a Constraint Service for
XML-based Data Integration Systems. Constraints from local data
sources and global constraints are expressed in a uniform constraint
model based on Active XQuery and are stored in Constraint
Repository. We introduce the concept of Constraint Wrapper and
translate local constraints from data sources automatically into the
uniform constraint model through Constraint Wrapper with the help of
schema mapping information. The Constraint Service can be published
as web service and be invoked by different Data Integration Systems.
Through the Constraint Service, queries can be optimized, and global
updates can be checked for validity and integrity. We establish the
DIS-CS system to facilitate both the architecture and the
implementation. We carry out experiments of Semantic Query
Optimization using Constraints. The results show that the
performance of the queries is greatly improved.
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| publisher |
The International Society for Computers and Their
Applications
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| type |
Text
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| Article in Proceedings
|
| source |
In: ISCA 20th INTERNATIONAL CONFERENCE ON COMPUTER APPLICATIONS IN
INDUSTRY AND ENGINEERING, November 7-9, 2007, San Francisco,
California, USA., pp. 212-217
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| contributor |
IPVS, Anwendersoftware
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| subject |
Database Management Systems (CR H.2.4)
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