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RE: [xsl] Easy Key-grammar Question

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If you need to find the items with @group != 0 frequently, use a global
variable:

<xsl:variable name="nonzeroitems" select="//item[@group != 0]"/>

If you don't need them frequently, then you don't need a key.

If "0" is actually a variable, then a key isn't going to help.

Michael Kay
http://www.saxonica.com/

> -----Original Message-----
> From: Bob Portnell [mailto:simply.bobp@xxxxxxxxx] 
> Sent: 26 September 2006 19:08
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] Easy Key-grammar Question
> 
> (And yet I don't see it clearly in the FAQ)
> 
> So, I've been handed
> 
> <xsl:for-each select="//item[@group != 0]">
> 
> The structure cries out for a key, and conveniently I already 
> have established <xsl:key name="ItemByGrp" match="item" 
> use="@group" />
> 
> Now, if I wanted the <item>s with @group='0', I'd use the 
> function key('ItemByGrp', 0). No fuss.
> 
> How do I opposite? *Can* I do the opposite, or am I better 
> off leaving it alone? Should I create a more refined key 
> definition thus?
> 
> <xsl:key name="GroupedItems" match="item[@group !=0]" use="@group" />
> 
> Curiosity abounds!
> 
> Bob Portnell
> simply.bobp@xxxxxxxxx

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