Group XML using xsl1.0 based on header value and lineItems - xslt

Question

I have an Orders XML input file where based on the Matching 'ref' XML tag and 'Shipto' XML tag, the order should be split with multiple batch orders.
Input xml:
<Purchase>
<Order>
<Header>
<Ref>13400</Ref>
<ShipToDetails>
<ShipTo>AAA</ShipTo>
</ShipToDetails>
</Header>
<Items>
<LineItem>800100</LineItem>
</Items>
</Order>
<Order>
<Header>
<Ref>13400</Ref>
<ShipToDetails>
<ShipTo>BBB</ShipTo>
</ShipToDetails>
</Header>
<Items>
<LineItem>800100</LineItem>
</Items>
</Order>
<Order>
<Header>
<Ref>13401</Ref>
<ShipToDetails>
<ShipTo>CCC</ShipTo>
</ShipToDetails>
</Header>
<Items>
<LineItem>800100</LineItem>
</Items>
</Order>
<Order>
<Header>
<Ref>13401</Ref>
<ShipToDetails>
<ShipTo>CCC</ShipTo>
</ShipToDetails>
</Header>
<Items>
<LineItem>800101</LineItem>
</Items>
</Order>
</Purchase>
Expected output:
<Header>
<Ref>13400</Ref>
<ShipToDetails>
<ShipTo>AAA</ShipTo>
</ShipToDetails>
</Header>
<Items>
<LineItem>800100</LineItem>
</Items>
</Batchorder>
<Batchorder>
<Header>
<Ref>13400</Ref>
<ShipToDetails>
<ShipTo>BBB</ShipTo>
</ShipToDetails>
</Header>
<Items>
<LineItem>800100</LineItem>
</Items>
</Batchorder>
<Batchorder>
<Header>
<Ref>13401</Ref>
<ShipToDetails>
<ShipTo>CCC</ShipTo>
</ShipToDetails>
</Header>
<Items>
<LineItem>800100</LineItem>
</Items>
<Items>
<LineItem>800101</LineItem>
</Items>
</Batchorder>
I have tried with below XSL1.0, but I get only the Partial output
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes"/>
<xsl:key name="Orders" match="Header" use="Ref"/>
<xsl:template match="Purchase">
<xsl:for-each select="/Purchase/Order/Header[generate-id() = generate-id(key('Orders',Ref)[1])]">
<Batchorder>
<header>
<OrderType>
<xsl:value-of select="../Ref"/>
</OrderType>
<ShipToDetails>
<ShipTo>
<xsl:value-of select="ShipTo"/>
</ShipTo>
</ShipToDetails>
</header>
<Items>
<LineItem>
<xsl:value-of select="../../Items/LineItem"/>
</LineItem>
</Items>
</Batchorder>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
I am looking for an xsl1.0 solution, any help will be appreciated. Thanks!

Answer 1

Change your XSLT code to the following. It uses a concatenated string for the xsl:key to combine the Ref and the ShipTo value as an index.
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes"/>
<xsl:key name="Orders" match="Order" use="concat(Header/Ref,'_',Header/ShipToDetails/ShipTo)"/>
<xsl:template match="Purchase">
<xsl:for-each select="Order[generate-id() = generate-id(key('Orders',concat(Header/Ref,'_',Header/ShipToDetails/ShipTo))[1])]">
<Batchorder>
<Header>
<xsl:copy-of select="Header/Ref | Header/ShipToDetails"/>
</Header>
<xsl:for-each select="key('Orders',concat(Header/Ref,'_',Header/ShipToDetails/ShipTo))">
<Items>
<LineItem>
<xsl:value-of select="Items/LineItem"/>
</LineItem>
</Items>
</xsl:for-each>
</Batchorder>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
Its output is
<?xml version="1.0"?>
<Batchorder>
<Header>
<Ref>13400</Ref>
<ShipToDetails>
<ShipTo>AAA</ShipTo>
</ShipToDetails>
</Header>
<Items>
<LineItem>800100</LineItem>
</Items>
</Batchorder>
<Batchorder>
<Header>
<Ref>13400</Ref>
<ShipToDetails>
<ShipTo>BBB</ShipTo>
</ShipToDetails>
</Header>
<Items>
<LineItem>800100</LineItem>
</Items>
</Batchorder>
<Batchorder>
<Header>
<Ref>13401</Ref>
<ShipToDetails>
<ShipTo>CCC</ShipTo>
</ShipToDetails>
</Header>
<Items>
<LineItem>800100</LineItem>
</Items>
<Items>
<LineItem>800101</LineItem>
</Items>
</Batchorder>
The output is not XML-1.0 conform because it doesn't have a single root element. Add an <xsl:copy> to the template to replicate the <Purchase> element if desired.