Subject: Re: [xsl] XSL sheet Optimisation From: Oliver Becker <obecker@xxxxxxxxxxxxxxxxxxxxxxx> Date: Mon, 23 Apr 2001 15:56:22 +0200 (MET DST) |
Hi Frederic, > Some of my nodes have an id attribute, but can be at any depth of the tree. > For example I have a <theme id="t1"> tag. So when I want to "reach" it from > the root node, I have to use this XPath expression : > > <xsl:apply-templates select="//theme[@id='t1']" /> > > Will the XSL processor (I use Xalan in Cocoon) process every node until it > finds the one ? Just like the XPath expression "://*[name(.)='theme' and > @id='t1']" ? Or is it better potimized ? if your id attribute is a *real* id, i.e. of the type ID declared in your DTD (e.g. <!ATTLIST theme id ID #IMPLIED>) then you can use the id function. -> select="id('t1')" Otherwise use keys. <xsl:key name="mykey" match="theme" use="@id" /> and then select="key('mykey', 't1')" Salut, Oliver /-------------------------------------------------------------------\ | ob|do Dipl.Inf. Oliver Becker | | --+-- E-Mail: obecker@xxxxxxxxxxxxxxxxxxxxxxx | | op|qo WWW: http://www.informatik.hu-berlin.de/~obecker | \-------------------------------------------------------------------/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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