Subject: Re: [xsl] XPath that returns nothing From: Liam R E Quin <liam@xxxxxx> Date: Mon, 26 Sep 2011 21:49:56 -0400 |
On Mon, 2011-09-26 at 23:17 +0200, Olivier Lefevre wrote: > What is the best XPath expression that is guaranteed to return nothing? > (best in the sense of simplest, always works and costs as little as > possible to evaluate). I was hoping it'd be the empty string but that > seems forbidden. *[0] or *[false()] might do it in both xpath 1 and 2. Hmm, depending on the evaluation context, /*[false()] is safer - e.g. since this is the XSL list, you may not have a context item. Liam -- Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/ Pictures from old books: http://fromoldbooks.org/ Ankh: irc.sorcery.net irc.gnome.org www.advogato.org
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