Skip to Main content Skip to Navigation
Journal articles

TGV: an Efficient Model for XQuery Evaluation within an Interoperable System

Abstract : This paper presents a generic model called TGV for efficient evaluation of XQuery in a heterogeneous distributed system. XQuery is a rich and so a complex language that allows users to express a large scale of queries over XML documents. This expressiveness makes difficulties to obtain an exclusive internal representation within a system. To this purpose, models based on Tree Patterns have been proposed: TPQ [ameryahia01], generalized by the GTP [chen2003]. However, they do not capture well all the expressivity of XQuery, cannot handle mediation problems, and do not support extensible optimisation and sources information.. We present a tree pattern-based model called TGV that - integrates the whole functionalities of XQuery - uses an intuitive representation that provides a global visualization of the request in a mediation context - provides a framework for extensible optimization using a rules definition model - take into account all knowledges useful for the query evaluation (cost model, accuracy, etc.) This work has been implemented in the XLive system \cite {dangngoc2005} based on a full-XML architecture.
Document type :
Journal articles
Complete list of metadatas
Contributor : Tuyet-Tram Dang-Ngoc <>
Submitted on : Friday, December 28, 2012 - 11:06:23 PM
Last modification on : Monday, January 25, 2021 - 3:16:03 PM
Long-term archiving on: : Friday, March 29, 2013 - 2:25:11 AM


Files produced by the author(s)


  • HAL Id : hal-00733420, version 1



Nicolas Travers, Tuyet-Tram Dang-Ngoc, Tianxiao Liu. TGV: an Efficient Model for XQuery Evaluation within an Interoperable System. Ibis, Wiley, 2007, 3, pp.ISSN: 1862-6378. ⟨hal-00733420⟩



Record views


Files downloads