NDLI: Order-Sensitive XML Query Processing over Relational Sources: An Algebraic Approach

Content Provider	IEEE Xplore Digital Library
Author	Ling Wang Song Wang Murphy, B. Rundensteiner, E.A.
Copyright Year	2005
Description	Author affiliation: Worcester Polytechnic Institute (Ling Wang)
Abstract	The XML data is order-sensitive. The order problem, that is how ordered XML documents and order-sensitive queries over it can be efficiently supported when mapped into the unordered relational data model, has not yet been adequately addressed. In this paper, we present a general approach for supporting order-sensitive XQuery-to-SQL translation that works irrespective of the chosen XML-to-relational data mapping and the selected order-encoding method. Our approach, called XSOT, utilizes an order-aware XML algebra representation. We propose order-sensitive rewriting rules at the algebraic level to eliminate the dependency of the order determining operators on the implicit XML view order. Furthermore, we introduce a series of order-sensitive optimization steps to transform the XML algebra tree for the purpose of efficient SQL translation. Lastly, we utilize a template-based approach using SQL-99 order features to generate SQL statements.
Starting Page	175
Ending Page	184
File Size	333402
Page Count	10
File Format	PDF
ISBN	0769524044
ISSN	10988068
DOI	10.1109/IDEAS.2005.40
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-07-25
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	XML Query processing Relational databases Data models Data mining Encoding Algebra Publishing Computer science Bridges
Content Type	Text
Resource Type	Article

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