Move elements from one place to another using XSLT 2 - xslt-2.0

Question

Move elements from one place to another using XSLT 2 (saxon8)
Hi all please help me to produce the following output using XSLT 2.0.
I have this:
<UL>
<ITEM>
aaa
<NL>iii
<ITEM1>111</ITEM1>
<ITEM2>222</ITEM2>
</NL>
</ITEM>
<ITEM>
bbb
<NL>vvv
<ITEM1>333</ITEM1>
<ITEM2>444</ITEM2>
</NL>
</ITEM>
</UL>
I need to produce this
<UL>
<ITEM>
aaa
<ITEM1>111</ITEM1>
</ITEM>
<ITEM>
bbb
<ITEM1>333</ITEM1>
</ITEM>
<NEW>
<NL>iii
<ITEM2>222</ITEM2>
</NL>
<NL>vvv
<ITEM2>444</ITEM2>
</NL>
</NEW>
</UL>
I am trying to get the output using mode option as mentioned below:
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()" />
</xsl:copy>
</xsl:template>
<xsl:template match="NL"/>
<xsl:template match="ITEM2"/>
<xsl:template match="UL">
<xsl:copy>
<xsl:apply-templates/>
<NEW>
<xsl:apply-templates select="descendant::NL" mode="move"/>
</NEW>
</xsl:copy>
</xsl:template>
<xsl:template match="ITEM" mode="move">
<xsl:copy>
<xsl:apply-templates/>
<xsl:apply-templates select="descendant::ITEM2" mode="move1"/>
</xsl:copy>
</xsl:template>
<xsl:template match="NL" mode="move">
<xsl:copy>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>
<xsl:template match="ITEM2" mode="move1">
<xsl:copy>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
Thanks and regards
Bala

Answer 1

Here is an XSLT 2.0 stylesheet that creates the structure you want, although white space is different, as it is a problem with mixed content to produce the exact output:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
exclude-result-prefixes="xs"
version="2.0">
<xsl:template match="UL">
<xsl:copy>
<xsl:for-each-group select="ITEM" group-by="NL/*/node-name(.)">
<xsl:choose>
<xsl:when test="position() eq 1">
<xsl:for-each select="current-group()">
<ITEM>
<xsl:apply-templates select="text() | NL/*[node-name(.) eq current-grouping-key()]"/>
</ITEM>
</xsl:for-each>
</xsl:when>
<xsl:otherwise>
<NEW>
<xsl:for-each select="current-group()">
<NL>
<xsl:apply-templates select="NL/(text() | *[node-name(.) eq current-grouping-key()])"/>
</NL>
</xsl:for-each>
</NEW>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each-group>
</xsl:copy>
</xsl:template>
<xsl:template match="NL/*">
<xsl:copy>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
I get the result
<UL><ITEM>
aaa
<ITEM1>111</ITEM1>
</ITEM><ITEM>
bbb
<ITEM1>333</ITEM1>
</ITEM><NEW><NL>iii
<ITEM2>222</ITEM2>
</NL><NL>vvv
<ITEM2>444</ITEM2>
</NL></NEW></UL>
When I add instructions to strip white space from the input and indent the output, as in
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
exclude-result-prefixes="xs"
version="2.0">
<xsl:strip-space elements="*"/>
<xsl:output indent="yes"/>
<xsl:template match="UL">
<xsl:copy>
<xsl:for-each-group select="ITEM" group-by="NL/*/node-name(.)">
<xsl:choose>
<xsl:when test="position() eq 1">
<xsl:for-each select="current-group()">
<ITEM>
<xsl:apply-templates select="text() | NL/*[node-name(.) eq current-grouping-key()]"/>
</ITEM>
</xsl:for-each>
</xsl:when>
<xsl:otherwise>
<NEW>
<xsl:for-each select="current-group()">
<NL>
<xsl:apply-templates select="NL/(text() | *[node-name(.) eq current-grouping-key()])"/>
</NL>
</xsl:for-each>
</NEW>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each-group>
</xsl:copy>
</xsl:template>
<xsl:template match="NL/*">
<xsl:copy>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
the result is
<UL>
<ITEM>
aaa
<ITEM1>111</ITEM1>
</ITEM>
<ITEM>
bbb
<ITEM1>333</ITEM1>
</ITEM>
<NEW>
<NL>iii
<ITEM2>222</ITEM2>
</NL>
<NL>vvv
<ITEM2>444</ITEM2>
</NL>
</NEW>
</UL>
As an alternative, if we know there are just ITEM1 and ITEM2 we want to split, here is stylesheet using modes:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="#*|node()" mode="#all">
<xsl:copy>
<xsl:apply-templates select="#*|node()" mode="#current"/>
</xsl:copy>
</xsl:template>
<xsl:template match="NL">
<xsl:apply-templates select="ITEM1"/>
</xsl:template>
<xsl:template match="ITEM2"/>
<xsl:template match="UL">
<xsl:copy>
<xsl:apply-templates/>
<NEW>
<xsl:apply-templates select="descendant::NL" mode="move"/>
</NEW>
</xsl:copy>
</xsl:template>
<xsl:template match="ITEM1" mode="move"/>
</xsl:stylesheet>