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2007
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Polynomial time fragments of XPath with variables

14 years 3 months ago
Polynomial time fragments of XPath with variables
Variables are the distinguishing new feature of XPath 2.0 which permits to select n-tuples of nodes in trees. It is known that the Core of XPath 2.0 captures n-ary first-order (FO) queries modulo linear time transformations. In this paper, we distinguish a fragment of Core XPath 2.0 that remains FO-complete with respect to n-ary queries while enjoying polynomial-time query answering. Categories and Subject Descriptors: H.2.3 [Languages]: Query Languages General Terms: Algorithms, Languages, Theory
Emmanuel Filiot, Joachim Niehren, Jean-Marc Talbot
Added 08 Dec 2009
Updated 08 Dec 2009
Type Conference
Year 2007
Where PODS
Authors Emmanuel Filiot, Joachim Niehren, Jean-Marc Talbot, Sophie Tison
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