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RE: [xsl] XSLT sort


Subject: RE: [xsl] XSLT sort
From: "Michael Kay" <mhk@xxxxxxxxx>
Date: Thu, 20 May 2004 22:28:33 +0100

> Im trying to get better performance by using keys, I have heard thats 
> possible but I dont know how to do.

If you have an expression of the form

//x[@y=$v]

then you can often improve performance by declaring a key

xsl:key name="k" match="x" use="@y"

and changing the expression to

key('k', $v)

But you won't get improved performance, or correct results, by shoving in
calls to key() where they don't make sense.

Michael Kay


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