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File: Data.xml
<?xml version="1.0"?>
<addressbook>
<address>
<name>
<title>Mr.</title>
<first-name>Doris</first-name>
<last-name>Smith</last-name>
</name>
<street>1234 Main Street</street>
<city>Sheboygan</city>
<state>WI</state>
<zip>48392</zip>
</address>
</addressbook>
File: Transform.xslt
<?xml version="1.0"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="html"/>
<xsl:key name="zipcodes" match="address" use="zip"/>
<xsl:template match="/">
<html>
<head>
<title>Customers grouped by Zip code</title>
</head>
<body>
<table border="1" cellpadding="5">
<xsl:for-each select="/addressbook/address[generate-id(.)=generate-id(key('zipcodes', zip)[1])]">
<xsl:sort select="zip"/>
<xsl:for-each select="key('zipcodes', zip)">
<xsl:sort select="name/last-name"/>
<xsl:sort select="name/first-name"/>
<tr>
<xsl:if test="position() = 1">
<td rowspan="{count(key('zipcodes', zip))}">
<xsl:text>Zip code </xsl:text>
<br/>
<span style="font-size: 150%;">
<xsl:value-of select="zip"/>
</span>
<br/>
<xsl:value-of select="city"/>
<xsl:text>, </xsl:text>
<xsl:value-of select="state"/>
</td>
</xsl:if>
<td>
<xsl:value-of select="name/first-name"/>
<xsl:text> </xsl:text>
<span>
<xsl:value-of select="name/last-name"/>
</span>
</td>
<td>
<xsl:value-of select="street"/>
</td>
</tr>
</xsl:for-each>
</xsl:for-each>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
Output:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Customers grouped by Zip code</title>
</head>
<body>
<table border="1" cellpadding="5">
<tr>
<td rowspan="1">Zip code <br><span style="font-size: 150%;">48392</span><br>Sheboygan, WI
</td>
<td>Doris <span>Smith</span></td>
<td>1234 Main Street</td>
</tr>
</table>
</body>
</html>
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