Re: [xsl] Setting Attributes from Key value

[David Carlisle <davidc@xxxxxxxxx>]

  <xsl:template match="//Group

don't start a match with // (it doesn't do anything) at all in this
case.
    <xsl:copy select=".">
that's a syntax error xsl:copy doesn't take an attribute

key('attribute-format-by-key',@Key)

that returns a Attribute-Format element so

key('attribute-format-by-key',@Key)[@ColIndex]

returns that element if it has a ColIndex attribute and nothing
otherwise. 

I didn't follow all your description but I think you want

  <xsl:template match="Grouping[not(key('attribute-format-by-key',@Key)]"/>

and


  <xsl:template match="Grouping">
    <xsl:copy>
       <xsl:attribute name="ColIndex">
         <xsl:value-of
    select="count(key('attribute-format-by-key',@Key)/preceding-sibling::*)"/>
   </xsl:attribute>
    </xsl:copy>
  </xsl:template>


David

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