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Kenny CudworthSubject: Grouping And Summing Up Based On Numerical Attribute
Author: Kenny Cudworth
Date: 17 Aug 2005 10:58 PM
I'm starting with this:

<?xml version="1.0" encoding="UTF-8"?>
<root>
<A objectKey="1" quantity="2">
<type> 5 </type>
</A>
<A objectKey="2" quantity="4">
<type> 5 </type>
</A>
<A objectKey="3" quantity="7">
<type> 6 </type>
</A>
<A objectKey="4" quantity="3">
<type> 5 </type>
</A>
<B objectKey="5"/>
<B objectKey="6"/>
</root>

Transforming with this:

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

<xsl:key name="group" match="A" use="type"/>

<xsl:template match="/">
<xsl:for-each select="//A[generate-id() = generate-id(key('group', type)[1])]">
<a>

<quantity>
<xsl:value-of select="current()/@quantity + sum(following-sibling::A[type = current()/type]/@quantity)"/>
</quantity>
<type>
<xsl:value-of select="current()/type"/>
</type>
</a>
</xsl:for-each>
</xsl:template>

</xsl:stylesheet>

Getting this:

<?xml version='1.0' ?>
<a><quantity>16</quantity><type> 5 </type></a><a><quantity>10</quantity><type> 6 </type></a>

But want this:

<?xml version="1.0" encoding="UTF-8"?>
<root>
<a objectKey="1" quantity="7">
<type> 5 </type>
</a>
<a objectKey="3" quantity="9">
<type> 6 </type>
</a>
<b objectKey="5" />
<b objectKey="6"/>
</root>



The filter I am setting on the following siblings isn't working and instead I'm getting all of the following siblings. I want just the siblings for the current group. Element order does not matter in the result. I need something like the group sum feature in SQL. I'd appreciate any help.
Postnext
Kenny CudworthSubject: Grouping And Summing Up Based On Numerical Attribute
Author: Kenny Cudworth
Date: 17 Aug 2005 11:00 PM
Correction!

I want this:

<?xml version='1.0' ?>
<a><quantity>9</quantity><type> 5 </type></a><a><quantity>7</quantity><type> 6 </type></a>
Postnext
Ivan PedruzziSubject: Grouping And Summing Up Based On Numerical Attribute
Author: Ivan Pedruzzi
Date: 18 Aug 2005 09:56 AM
You have to use the current group generated by key function call

<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes"/>
<xsl:key name="group" match="A" use="type"/>
<xsl:template match="/">
<root>
<xsl:for-each select="//A[generate-id() = generate-id(key('group', type)[1])]">
<a>
<quantity>
<xsl:value-of select="sum(key('group', type)/@quantity)"/>
</quantity>
<xsl:copy-of select="type"/>
</a>
</xsl:for-each>
</root>
</xsl:template>
</xsl:stylesheet>

Hope this helps
Ivan Pedruzzi
Stylus Studio Team
Posttop
Kenny CudworthSubject: Grouping And Summing Up Based On Numerical Attribute
Author: Kenny Cudworth
Date: 18 Aug 2005 05:14 PM
Works well and straight-forward. Thanks Ivan.
   
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