As with dynamic sorting: if you know that the dynamic keys will be simple
element names, you can use *[name()=$key]. For anything more complex, you
need xx:evaluate(). If you can't get this to work you'll need to show us
what you did before we can tell you what you did wrong.

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

> -----Original Message-----
> From: christoph.klocker@xxxxxx [mailto:christoph.klocker@xxxxxx] 
> Sent: 16 July 2007 06:49
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  dynamic grouping assignment
> 
> Hi,
> How can I dynamically assing a grouping key, where I provide 
> some of the grouping keys as parameters.
> 
> I have the parameters
> 
>   <xsl:param name="groupingKeys" >
>         <key>order_typ</key>
>         <key>ordr_block</key>
>     </xsl:param > 
> 
> I would like to add to the group-by evaluation.
> 
>  <xsl:for-each-group select="result" 
> group-by="concat(receiver, operation, data, prev_bus_state, 
> string-join(for $x in $groupingKeys return $x/key, ','))">
> 
> I guess I need to use the saxon:evaluate() extension, but I 
> couldn't get it right.
> 
> thanks
> 
> 
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