Re: [XSLT2] Some common, generic grouping problems

Hi,
       Please see the below stylesheet. This was done by me independently
by me. Of course after taking some help from previous postings.

<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:foo="http://whatever">

<xsl:output indent="yes"/>

<xsl:template match="root">
  <root>

<xsl:variable name="origdoc" select="/"/>

      <xsl:for-each-group select="*"
group-starting-with="*[@color=('dark-red')] ">

             <xsl:choose>
                    <xsl:when test="self::*[@color='dark-red']">

                          <xsl:for-each-group select="current-group()"
group-ending-with="*[@color='light-red']">

                         <xsl:choose>
                               <xsl:when
test="current-group()[last()][self::*[@color='light-red']]">

                    <red>
                                          <xsl:copy-of
select="current-group()"/>
                        </red>

             </xsl:when>
              <xsl:otherwise>
            <xsl:copy-of select="."/>
            </xsl:otherwise>
                  </xsl:choose>



                        </xsl:for-each-group>


       </xsl:when>
      <xsl:otherwise>
      <xsl:copy-of select="."/>
      </xsl:otherwise>
    </xsl:choose>


</xsl:for-each-group>



  </root>
</xsl:template>

</xsl:stylesheet>



Regards,
V.Omprakash
Sr. Technical Architect,
Product Architecture group
4555 Intellect ct, Extn: 4547
Mobile: 98843 07767


                                                                                                                                       
                      "andrew welch"                                                                                                   
                      <andrew.j.welch@         To:      xsl-list@xxxxxxxxxxxxxxxxxxxxxx                                                
                      gmail.com>               cc:      (bcc: omprakash.v/Polaris)                                                     
                                               Subject: Re:  [XSLT2] Some common, generic grouping problems                       
                      06/30/2006 04:29                                                                                                 
                      PM                                                                                                               
                      Please respond                                                                                                   
                      to xsl-list                                                                                                      
                                                                                                                                       
                                                                                                                                       




On 6/30/06, Christian Roth <roth@xxxxxxxxxxxxxx> wrote:
> andrew welch wrote:
>
> ><root>
> >   <arbitrary />
> >   <elem       color="dark-red" />
> >   <elem       color="red" />
> >   <arbitrary  color="none" />
> >   <elem       color="red" />
> >   <elem       color="light-red" />
> >   <arbitrary />
> >   <elem       color="dark-red" />
> >   <elem       color="red" />
> >   <arbitrary  color="none" />
> >   <elem       color="red" />
> >   <elem       color="light-red" />
> >   <arbitrary />
> ></root>
> [...]
> >That is of course if I've scaled up the input correctly, no comment
> >from the OP so far.
>
> Yes, this is how the input would scale. I'm sorry for not replying
> earlier to the solutions given so far (Andrew, David) - I must admit
> that I am still digesting the code given to extract and understand the
> underlying idea(s).
>
> For your (Andrew's) solution to example #1, am I right that the
> underlying idea could be paraphrased as:
>
> "Group by start, then tail-trim the resulting groups to end (using a
> nested grouping from end)"?

Yes - I would call it "intersecting" rather than "trimming", its
providing the end marker for the group.  The elements that aren't in
the intersect are copied to the result (in the xsl:otherwise blocks)
so trimming might give the wrong impression.



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