XSLT Saxon - Getting Latest node value - xslt

Question

I am trying to find the last element in my input xml, which looks like
<ROOT>
<Items>
<Item>
<FieldTag>AMOUNT</FieldTag>
</Item>
<Item>
<FieldTag>CAT_TYPE</FieldTag>
</Item>
<Item>
<FieldTag>NUMBER</FieldTag>
</Item>
</Items>
<getResponse xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<MAIN>
<ArrayItem>
<NUMBER>123456789</NUMBER>
<CTRY>GB</CTRY>
<NAME>TEST NAME</NAME>
<RS>
<ArrayOfRSItem>
<DATE_1>2014-12-12T10:14:02-05:00</DATE_1>
<DATE_2>2014-12-12T10:13:53-05:00</DATE_2>
<AMOUNT>11111</AMOUNT>
</ArrayOfRSItem>
<ArrayOfRSItem>
<DATE_1>2014-12-13T17:16:19-05:00</DATE_1>
<DATE_2>2014-12-13T16:33:07-05:00</DATE_2>
<AMOUNT>22222</AMOUNT>
</ArrayOfRSItem>
<ArrayOfRSItem>
<DATE_1>2014-12-12T10:14:02-05:00</DATE_1>
<DATE_2>2014-12-12T10:13:53-05:00</DATE_2>
<CAT_TYPE>10000</CAT_TYPE>
</ArrayOfRSItem>
<ArrayOfRSItem>
<DATE_1>2014-12-13T17:16:19-05:00</DATE_1>
<DATE_2>2014-12-13T16:33:07-05:00</DATE_2>
<CAT_TYPE>20000</CAT_TYPE>
</ArrayOfRSItem>
</RS>
</ArrayItem>
</MAIN>
</getResponse>
</ROOT>
and I use following XSLT file for transformation
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:urn="urn:iso:std:iso:20022:tech:xsd:pain.001.001.02"
xmlns:func="http://www.test.com/"
exclude-result-prefixes="urn func" xmlns:saxon="http://saxon.sf.net/"
extension-element-prefixes="saxon">
<xsl:output method ="xml" indent="yes" omit-xml-declaration="yes" />
<xsl:template match="/">
<xsl:if test="count(/ROOT/getResponse/MAIN/ArrayItem) > 0" >
<Data>
<xsl:for-each select="/ROOT/getResponse/MAIN/ArrayItem" >
<xsl:element name="NodeItem">
<xsl:variable name="TempNo" select="NUMBER"/>
<xsl:element name="Number">
<xsl:value-of select="NUMBER"/>
</xsl:element>
<xsl:element name="Country">
<xsl:value-of select="CTRY"/>
</xsl:element>
<xsl:element name="Name">
<xsl:value-of select="NAME"/>
</xsl:element>
<xsl:element name="DataChanges">
<xsl:for-each select="./RS/ArrayOfRSItem/*" >
<xsl:if test="name()!='DATE_1' and name()!='DATE_2' ">
<xsl:variable name="ChangedNodeName" select="name()"></xsl:variable>
<xsl:for-each select="/ROOT/Items/Item">
<xsl:variable name="DisplayNodeName" select="FieldTag"></xsl:variable>
<xsl:if test="$DisplayNodeName = $ChangedNodeName">
<xsl:element name="FieldItem">
<xsl:attribute name="Tag">
<xsl:value-of select="FieldTag"/>
</xsl:attribute>
<xsl:variable name="NodeFullText" select="concat('../../getResponse/MAIN/ArrayItem[NUMBER=',$TempNo,']/RS/ArrayOfRSItem/',$DisplayNodeName)"/>
<xsl:attribute name="Value">
<xsl:value-of select="saxon:evaluate($NodeFullText)"/>
</xsl:attribute>
</xsl:element>
</xsl:if>
</xsl:for-each>
</xsl:if>
</xsl:for-each>
</xsl:element>
</xsl:element>
</xsl:for-each>
</Data>
</xsl:if>
</xsl:template>
</xsl:stylesheet>
to get the desired output in the form of
<Data>
<NodeItem>
<Number>123456789</Number>
<Country>GB</Country>
<Name>TEST NAME</Name>
<DataChanges>
<FieldItem Tag="AMOUNT" Value="22222"/>
<FieldItem Tag="CAT_TYPE" Value="20000"/>
</DataChanges>
</NodeItem>
</Data>
But I am getting the output xml as
<Data>
<NodeItem>
<Number>123456789</Number>
<Country>GB</Country>
<Name>TEST NAME</Name>
<DataChanges>
<FieldItem Tag="AMOUNT" Value="11111 22222"/>
<FieldItem Tag="AMOUNT" Value="11111 22222"/>
<FieldItem Tag="CAT_TYPE" Value="10000 20000"/>
<FieldItem Tag="CAT_TYPE" Value="10000 20000"/>
</DataChanges>
</NodeItem>
</Data>
I need to get the latest AMOUNT entry and CAT_TYPE. Any help or guidance would be much appreciated. Thanks in advance.

Answer 1

Couldn't this be (much) simpler?
XSLT 1.0 (or 2.0)
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="utf-8" indent="yes"/>
<xsl:template match="/">
<Data>
<xsl:apply-templates select="ROOT/getResponse/MAIN/ArrayItem"/>
</Data>
</xsl:template>
<xsl:template match="ArrayItem">
<NodeItem>
<Number><xsl:value-of select="NUMBER"/></Number>
<Country><xsl:value-of select="CTRY"/></Country>
<Name><xsl:value-of select="NAME"/></Name>
<DataChanges>
<xsl:apply-templates select="RS/ArrayOfRSItem/AMOUNT">
<xsl:sort select="../DATE_1" data-type="text" order="descending"/>
</xsl:apply-templates>
<xsl:apply-templates select="RS/ArrayOfRSItem/CAT_TYPE">
<xsl:sort select="../DATE_1" data-type="text" order="descending"/>
</xsl:apply-templates>
</DataChanges>
</NodeItem>
</xsl:template>
<xsl:template match="AMOUNT | CAT_TYPE">
<xsl:if test="position() = 1">
<FieldItem Tag="{local-name()}" Value="{.}"/>
</xsl:if>
</xsl:template>
</xsl:stylesheet>
Result, when applied to your example input:
<?xml version="1.0" encoding="utf-8"?>
<Data>
<NodeItem>
<Number>123456789</Number>
<Country>GB</Country>
<Name>TEST NAME</Name>
<DataChanges>
<FieldItem Tag="AMOUNT" Value="22222"/>
<FieldItem Tag="CAT_TYPE" Value="20000"/>
</DataChanges>
</NodeItem>
</Data>