RE: [xsl] xslt 2 grouping

[DPawson@xxxxxxxxxxx]

> ><p>
> ><el att='a'>x</el>
> ><el att='b'>x</el>
> ><el att='c'>x</el>
> ><el att='d'>y</el>
> ></p>
> >I have about 1200 lines of this, so keys are out.
> 
> Why discount keys?

Because I have so many variants on (above) x, y.
ditto on the att values, so I would have to define about 200 unique
keys.


> 
> >I want to find all the el elements with content 'a'
> >which have *different* att attribute values,
> >
> >to produce
> >
> ><el name='x'>a b c </el>
> 
> Below is a solution that doesn't use keys.  I've added this 
> technique to 
> the Sorting/Grouping section of my XSLT training and the 
> students have 
> found it useful.
> 
> >I.e. list x, together with all the attributes att
> >which are different.
> >
> >I'm guessing its a good one for xslt 2, for-each and group-by,
> >but I'm stumped on the syntax.
> 
> Are you required to use XSLT-2?

No, but it looks like the xslt 2 group-by would be along the right lines,
a solution based roughly along the lines of what you have below
is still running 15 minutes later.

 <xsl:template match='el'>
    <xsl:variable name='f' select='@att'/>
    <xsl:variable name='p' select='.'/>
 
    <row><entry><xsl:value-of select='.'/></entry>
    <entry>
  <xsl:value-of select='@f'/>,
  <xsl:for-each select="following-sibling::p[. = $p]">
    <xsl:if test='not(@f=$f)'>
      <xsl:value-of select='@f'/>
    </xsl:if>
    <xsl:if test='not(position()=last())'>, </xsl:if>
  </xsl:for-each>
</entry>
</row>
  </xsl:template>

Though I hadn't used the generate-id test for uniqueness Ken,
that would be a more efficient solution, I'll try it. 
thanks DaveP.

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