Conception et Evaluation de XQuery dans une architecture de médiation "Tout-XML"

Details Conception et Evaluation de XQuery dans une architecture de médiation "Tout-XML" Conception et Evaluation de XQuery dans une architecture de médiation "Tout-XML"

2008-06-30

arxiv.org/abs/0806.4920v1

Revue ISI (Integration de syst\`emes d'information) : Num\'ero sp\'ecial sur les Bases de Donn\'ees Semi-structur\'ees 8, 5-6

Computer Science

Databases

Scientific paper

XML has emerged as the leading language for representing and exchanging data not only on the Web, but also in general in the enterprise. XQuery is emerging as the standard query language for XML. Thus, tools are required to mediate between XML queries and heterogeneous data sources to integrate data in XML. This paper presents the XMedia mediator, a unique tool for integrating and querying disparate heterogeneous information as unified XML views. It describes the mediator architecture and focuses on the unique distributed query processing technology implemented in this component. Query evaluation is based on an original XML algebra simply extending classical operators to process tuples of tree elements. Further, we present a set of performance evaluation on a relational benchmark, which leads to discuss possible performance enhancements.

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