Robert,



Here's a demo of what you could do -- it first creates an RTF (result tree 
fragment) in required order, then walks the tree, emitting elements as it 
does so.  Thus, with this XML:



<data>
   <a n="1" v="1"/>
   <a n="2" v="1"/>
   <a n="4" v="2"/>
   <a n="3" v="1"/>
</data>


This XSL:



<?xml version="1.0" encoding="iso8859-1"?>

<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"

   xmlns:xalan="http://xml.apache.org/xalan"

   exclude-result-prefixes="xalan">



   <xsl:output method="xml" indent="yes"/>
   <xsl:strip-space elements="*"/>

   <xsl:template match="/">
       <xsl:variable name="sortedNodes">
           <xsl:for-each select="data/a">
               <xsl:sort data-type="number" order="ascending" select="@v"/>
               <xsl:sort data-type="number" order="ascending" select="@n"/>
               <xsl:copy-of select="."/>
           </xsl:for-each>
       </xsl:variable>

       <xsl:variable name="sortedNodeSet" 
select="xalan:nodeset($sortedNodes)"/>



       <data>

           <xsl:call-template name="write-row">

               <xsl:with-param name="node" select="$sortedNodeSet/a[1]"/>

               <xsl:with-param name="n-start" 
select="$sortedNodeSet/a[1]/@n"/>

               <xsl:with-param name="v" select="$sortedNodeSet/a[1]/@v"/>

           </xsl:call-template>

       </data>

   </xsl:template>



   <xsl:template name="write-row">
       <xsl:param name="node" select="/.."/>
       <xsl:param name="n-start"/>
       <xsl:param name="v"/>

       <xsl:choose>
           <xsl:when test="not($node/following-sibling::a[1])">
               <row start="{$n-start}" end="{$node/@n}" v="{$v}"/>
           </xsl:when>
           <xsl:when test="$v != $node/following-sibling::a[1]/@v">
               <row start="{$n-start}" end="{$node/@n}" v="{$v}"/>

               <xsl:variable name="next-node" 
select="$node/following-sibling::a[1]"/>

               <xsl:if test="$next-node">

                   <xsl:call-template name="write-row">

                       <xsl:with-param name="node" select="$next-node"/>

                       <xsl:with-param name="n-start" 
select="$next-node/@n"/>

                       <xsl:with-param name="v" select="$next-node/@v"/>

                   </xsl:call-template>

               </xsl:if>

           </xsl:when>

           <xsl:otherwise>

               <xsl:call-template name="write-row">

                   <xsl:with-param name="node" 
select="$node/following-sibling::a[1]"/>

                   <xsl:with-param name="n-start" select="$n-start"/>

                   <xsl:with-param name="v" select="$v"/>

               </xsl:call-template>

           </xsl:otherwise>

       </xsl:choose>



   </xsl:template>



</xsl:stylesheet>




Produces:



<?xml version="1.0" encoding="UTF-8"?>
<data>
 <row v="1" end="3" start="1"/>
 <row v="2" end="4" start="4"/>
</data>

Regards,



--A





From: "Midnit" <midnit@xxxxxxxxxxxxxxxxx>
Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx>
Subject: [xsl] Sort, group, flatten, consecutive data
Date: Tue, 28 Jun 2005 17:01:18 -0400

This is my first post here; I apologize if it's inappropriate.



I'm attempting to flatten and consolidate this XML document. In short I

would sort by DETAIL_ID and PRODUCTIONDAY, then group up based on the RATE,

outputting BEGINDAY and ENDDAY to represent the date range the RATE 
covered.

Though not shown in this example of data, there will be a record for every

day in the month so sorting by PRODUCTIONDAY will always produce 
consecutive

rows. I have no problem flattening the data but the attempts I've made at

grouping the data have failed miserably. All the examples I have found use

preceding-sibling and following-sibling which doesn't apply for my data, at

least that's my assumption. I have also tried using keys but I have run 
into

similar problems.




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