Gentlemen, I am trying out features of schema-aware transformations. I am aware that one of the things SaxonSA is supposed to be able to do is signal errors when XPath expressions in your XSLT would resolve in empty sequences by necessity (given valid input), since the elements named would be invalid according to the given schema. (This is documented on pp 169-170 of Michael Kay's Programmers Reference, 4th ed., and elsewhere.) But I can't get this to work in oXygen. SaxonSA happily runs my transform without emitting warnings, even when I put spurious XPath in. On p 169 of the PR 4ed, Mike indicates that -val:strict has to be provided from the command line. In oXygen's Preferences, I can see how to set -val, but not -val:strict. Might that have to do with why this feature isn't working for me? This is just a guess, since Saxon does complain if input is not valid. Otherwise I'm completely in the dark. I'd be grateful for any tips. I'm still on oXygen 10; the version of SaxonSA is 9.1.0.3J. Thanks! Wendell ====================================================================== Wendell Piez mailto:wapiez@mulberrytech.com Mulberry Technologies, Inc. http://www.mulberrytech.com 17 West Jefferson Street Direct Phone: 301/315-9635 Suite 207 Phone: 301/315-9631 Rockville, MD 20850 Fax: 301/315-8285 ---------------------------------------------------------------------- Mulberry Technologies: A Consultancy Specializing in SGML and XML ======================================================================