The attached ps file contains an example of an XML document and an information need which uses an "until" like path (that is, a descendant path such that all nodes on the path have a certain attribute-value true at them). I could prove that this query is not expressible in Core XPath (the "logical core of XPath 1.0" defined by Gottlob et al). It is unclear to me if I can express it in XPath 2.0. Any help welcome. Maarten Marx -- *************************************************************************** Maarten Marx marx@science.uva.nl http://www.science.uva.nl/~marx Language and Inference Technology Group, ILLC, Universiteit van Amsterdam Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands. Phone: +31 20 525 2888 Mobile: 06 400 16 120 Fax: +31 20 525 2800 ***************************************************************************
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