Subject: RE: [xsl] XPath for matching multiple child elements From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Fri, 29 Sep 2006 08:17:39 +0100 |
> Probably this would be faster? > > <xsl:stylesheet version="2.0" > xmlns:xsl="http://www.w3.org/1999/XSL/Transform" > > > > <xsl:key name="kComDesc" match="h1|p|b|i" > use="exists(ancestor::Comments[1])"/> > > <xsl:template match="key('kComDesc', 'true')"> > Whatever processing here > </xsl:template> > </xsl:stylesheet> Yes, that would probably work reasonably well (and it's nice to find a plausible use case for using key() in a pattern). One point to be careful about though: if the "use" value is a boolean, the second parameter of key() should also be a boolean, so it should be key('kComDesc', true()). There's no implicit casting in 2.0, and non-comparable values are treated as not matching, so you can get some hard-to-diagnose errors in this area. The "[1]" suggests you don't have much confidence in your product's optimizer... Michael Kay http://www.saxonica.com/
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