File: Data.xml
<?xml version="1.0"?>
<!-- names.xml -->
<addressbook>
<address>
<name>
<title>Mr.</title>
<first-name>Doris</first-name>
<last-name>Smith</last-name>
</name>
<street>1234 Main Street</street>
<city>New York</city>
<state>WI</state>
<zip>48392</zip>
</address>
<address>
<name>
<title>Ms.</title>
<first-name>Jane</first-name>
<last-name>Lee</last-name>
</name>
<street>930-A Chestnut Street</street>
<city>Twincity</city>
<state>MA</state>
<zip>02930</zip>
</address>
</addressbook>
File: Transform.xslt
<?xml version="1.0"?>
<!-- namegrouper2a.xsl -->
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="no"/>
<xsl:strip-space elements="*"/>
<xsl:template match="/">
<addressbook>
<xsl:for-each select="addressbook/address">
<xsl:sort select="zip"/>
<xsl:copy-of select="."/>
</xsl:for-each>
</addressbook>
</xsl:template>
</xsl:stylesheet>
Output:
<?xml version="1.0" encoding="UTF-8"?><addressbook><address><name><title>Ms.</title><first-name>Jane</first-name><last-name>Lee</last-name></name><street>930-A Chestnut Street</street><city>Twincity</city><state>MA</state><zip>02930</zip></address><address><name><title>Mr.</title><first-name>Doris</first-name><last-name>Smith</last-name></name><street>1234 Main Street</street><city>New York</city><state>WI</state><zip>48392</zip></address></addressbook>
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