Question

i need some help regarding grouping nodes in xslt 1.0. I am able to this in xslt 2.0 with for-each-group but i don’t know how to do it in 1.0. Shown below is sample xml, in which i want to group the ‘CLM’ node using a combination of ServiceId, WorkerId and Date of service on ‘ClaimId’ attribute and sum of ‘Units’. If service given on same day by same worker more than once than combine those ‘CLM’ nodes.

<?xml version="1.0" encoding="UTF-8"?>
<PRV ProviderId="100" PName="Giga health" Provsuv="1563">
    <CLT ClientId="4444" ClientFName="John" ClientLastName="Pulaski" Phone="56462561">
        <CLM Claimid="1"  DateOfService="01/02/2011" EndOfService="05/05/2011" ServiceId="S1" WorkerName="WORK1" WorkerId="6446" Unit= '5' Amount= '5000'/>
        <CLM Claimid="2"  DateOfService="01/02/2011" EndOfService="05/05/2011" ServiceId="S1" WorkerName="WORK1" WorkerId="6446" Unit= '6' Amount= '5000'/>
        <CLM Claimid="3"  DateOfService="01/02/2011" EndOfService="05/05/2011" ServiceId="S2" WorkerName="WORK1" WorkerId="2006" Unit= '7' Amount= '5000'/>
        <CLM Claimid="4"  DateOfService="01/03/2011" EndOfService="05/05/2011" ServiceId="S1" WorkerName="WOK2" WorkerId="6446" Unit= '3' Amount= '5000'/>
        <CLM Claimid="5"  DateOfService="01/03/2011" EndOfService="05/05/2011" ServiceId="S2" WorkerName="WORK2" WorkerId="6446" Unit= '8' Amount= '5000'/>
        <CLM Claimid="6" DateOfService="01/03/2011" EndOfService="05/05/2011" ServiceId="S2" WorkerName="WORK1" WorkerId="6446" Unit= '1' Amount= '5000'/>
    </CLT>

My output should look like

<?xml version="1.0" encoding="UTF-8"?>
<PRV ProviderId="100" PName="Giga health" Provsuv="1563">
    <CLT ClientId="4444" ClientFName="John" ClientLastName="Pulaski" Phone="56462561">
        <CLM Claimid="1,2"  DateOfService="01/02/2011" EndOfService="05/05/2011" ServiceId="S1" WorkerName="WORK1" WorkerId="6446" Unit= '11' Amount= '10000'/>
        <CLM Claimid="3"  DateOfService="01/02/2011" EndOfService="05/05/2011" ServiceId="S2" WorkerName="WORK1" WorkerId="2006" Unit= '7' Amount= '5000'/>
        <CLM Claimid="4"  DateOfService="01/03/2011" EndOfService="05/05/2011" ServiceId="S1" WorkerName="WOK2" WorkerId="6446" Unit= '3' Amount= '5000'/>
        <CLM Claimid="5,6"  DateOfService="01/03/2011" EndOfService="05/05/2011" ServiceId="S2" WorkerName="WORK2" WorkerId="6446" Unit= '9' Amount= '10000'/>
    </CLT>

My output xml should have ‘Claimid’ combined and Units to be summed up for same serviceId on same DateofService for a specific ‘WorkerId’. Thanks in advance.

Answer 1

This transformation:

<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output omit-xml-declaration="yes" indent="yes"/>
 <xsl:strip-space elements="*"/>

 <xsl:key name="kCLMByAttribs" match="CLM" use=
 "concat(@ServiceId,'+',@WorkerId,'+',@DateOfService)"/>

 <xsl:template match="node()|@*">
  <xsl:copy>
   <xsl:apply-templates select="node()|@*"/>
  </xsl:copy>
 </xsl:template>

 <xsl:template match=
 "CLM[generate-id()
     =
      generate-id(key('kCLMByAttribs',
                      concat(@ServiceId,
                            '+',@WorkerId,
                            '+',@DateOfService)
                     )
                     [1]
                 )
     ]
 ">
  <xsl:copy>
   <xsl:copy-of select="@*"/>

   <xsl:variable name="vGroup" select=
   "key('kCLMByAttribs',
         concat(@ServiceId,
                '+',@WorkerId,
                '+',@DateOfService)
       )
   "/>

   <xsl:variable name="vClaimIds">
    <xsl:for-each select="$vGroup">
      <xsl:if test="not(position()=1)">
       <xsl:value-of select="','"/>
      </xsl:if>
      <xsl:value-of select="@Claimid"/>
    </xsl:for-each>
   </xsl:variable>

   <xsl:attribute name="Claimid">
    <xsl:value-of select="$vClaimIds"/>
   </xsl:attribute>

   <xsl:attribute name="Unit">
    <xsl:value-of select="sum($vGroup/@Unit)"/>
   </xsl:attribute>
  </xsl:copy>
 </xsl:template>

 <xsl:template match="CLM"/>
</xsl:stylesheet>

when applied on the provided XML document:

<PRV ProviderId="100" PName="Giga health"
Provsuv="1563">
    <CLT ClientId="4444" ClientFName="John"
      ClientLastName="Pulaski" Phone="56462561">
        <CLM Claimid="1"  DateOfService="01/02/2011"
          EndOfService="05/05/2011" ServiceId="S1"
          WorkerName="WORK1" WorkerId="6446"
          Unit= '5' Amount= '5000'/>
        <CLM Claimid="2"  DateOfService="01/02/2011"
         EndOfService="05/05/2011" ServiceId="S1"
         WorkerName="WORK1" WorkerId="6446"
         Unit= '6' Amount= '5000'/>
        <CLM Claimid="3"  DateOfService="01/02/2011"
         EndOfService="05/05/2011" ServiceId="S2"
         WorkerName="WORK1" WorkerId="2006"
         Unit= '7' Amount= '5000'/>
        <CLM Claimid="4"  DateOfService="01/03/2011"
         EndOfService="05/05/2011" ServiceId="S1"
         WorkerName="WOK2" WorkerId="6446"
         Unit= '3' Amount= '5000'/>
        <CLM Claimid="5"  DateOfService="01/03/2011"
         EndOfService="05/05/2011" ServiceId="S2"
         WorkerName="WORK2" WorkerId="6446"
         Unit= '8' Amount= '5000'/>
        <CLM Claimid="6" DateOfService="01/03/2011"
         EndOfService="05/05/2011" ServiceId="S2"
         WorkerName="WORK1" WorkerId="6446"
         Unit= '1' Amount= '5000'/>
    </CLT>
</PRV>

produces exactly the wanted, correct result:

<PRV ProviderId="100" PName="Giga health" Provsuv="1563">
   <CLT ClientId="4444" ClientFName="John"
        ClientLastName="Pulaski" Phone="56462561">
      <CLM Claimid="1,2" DateOfService="01/02/2011"
       EndOfService="05/05/2011" ServiceId="S1"
       WorkerName="WORK1" WorkerId="6446"
       Unit="11" Amount="5000"/>
      <CLM Claimid="3" DateOfService="01/02/2011"
       EndOfService="05/05/2011" ServiceId="S2"
       WorkerName="WORK1" WorkerId="2006"
       Unit="7" Amount="5000"/>
      <CLM Claimid="4" DateOfService="01/03/2011"
       EndOfService="05/05/2011" ServiceId="S1"
       WorkerName="WOK2" WorkerId="6446"
       Unit="3" Amount="5000"/>
      <CLM Claimid="5,6" DateOfService="01/03/2011"
       EndOfService="05/05/2011" ServiceId="S2"
       WorkerName="WORK2" WorkerId="6446"
       Unit="9" Amount="5000"/>
   </CLT>
</PRV>

Explanation:

Muenchian grouping with a key that is the concatenation of three parts.