Active Media Technology

Volume 7669 of the series Lecture Notes in Computer Science pp 307-317

An Approach to Define Flexible Structural Constraints in XQuery

  • Emanuele PanzeriAffiliated withUniversity of Milano-Bicocca
  • , Gabriella PasiAffiliated withUniversity of Milano-Bicocca

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This paper presents a formal definition of an extension of the XQuery Full-Text language: the proposed extension consists in adding two new flexible axes, named below and near, which express structural constraints that can be specified by the user. Both constraints are evaluated in an approximate way with respect to a considered path, and their evaluation produces a path relevance score for each retrieved element. The formal syntax and the semantics of the two new axis are presented and discussed.