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Re: [xsl] Retaining value of a Global variable

Subject: Re: [xsl] Retaining value of a Global variable
From: David Carlisle <davidc@xxxxxxxxx>
Date: Mon, 19 Jul 2004 10:18:15 +0100
> Solution 2 - The second solution requires utilization of the preceding-sibling 
> axis in XPath.  The problem with using preceding-sibling in any sort of test is 
> as the processor continues through the tree another preceding-sibling is added 
> to the list of preceding-siblings.  This test will evaluate each and every 
> preceding-sibling so it doesnt take long for performance to become a BIG issue. 


this is essentially why "muenchiam grouping" using keys is a big win.
The original posters (rephrased) problem sounds like the canonical use
case for the grouping techniques (as explaied at
www.jenitennison.com/xslt/grouping) 

David

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