xsl:choose, xsl:when and xsl:otherwise : choose « XSLT stylesheet « XML Tutorial
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File: Data.xml
<?xml version = "1.0" encoding = "UTF-8"?>
<planner>
<year value="2002">
<date month="7" day="15">
<note time="1430">meeting</note>
<note time="1620">course</note>
</date>
<date month="7" day="4">
<note>Independence Day</note>
</date>
<date month="7" day="9">
<note />
</date>
</year>
</planner>
File: Transform.xslt
<?xml version = "1.0" encoding = "UTF-8"?>
<xsl:stylesheet version = "1.0"
xmlns:xsl = "http://www.w3.org/1999/XSL/Transform"
xmlns = "http://www.w3.org/1999/xhtml">
<xsl:output method = "xml" omit-xml-declaration = "no"
doctype-system =
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"
doctype-public =
"-//W3C//DTD XHTML 1.0 Strict//EN" />
<xsl:template match = "/">
<html>
<head><title>Conditional Processing</title></head>
<body>
<paragraph>Appointments
<br />
<xsl:apply-templates select = "planner/year" />
</p>
</body>
</html>
</xsl:template>
<xsl:template match = "year">
<strong>Year:</strong>
<xsl:value-of select = "@value" />
<br />
<xsl:for-each select = "date/note">
<!-- sort by date's day attribute value -->
<xsl:sort select = "../@day" order = "ascending"
data-type = "number" />
<br />
<strong>
Day:
<xsl:value-of select = "../@month"/>/
<xsl:value-of select = "../@day"/>
</strong>
<br />
<xsl:choose>
<xsl:when test =
"@time > '0500' and @time < '1200'">
Morning (<xsl:value-of select = "@time" />):
</xsl:when>
<xsl:when test =
"@time > '1200' and @time < '1700'">
Afternoon (<xsl:value-of select = "@time" />):
</xsl:when>
<xsl:when test =
"@time > '1200' and @time < '2200'">
Evening (<xsl:value-of select = "@time" />):
</xsl:when>
<xsl:when test =
"@time > '2200' and @time < '500'">
Night (<xsl:value-of select = "@time" />):
</xsl:when>
<xsl:otherwise>
Entire day:
</xsl:otherwise>
</xsl:choose>
<xsl:value-of select = "." />
<xsl:if test = ". = ''">
n/a
</xsl:if>
<br />
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
Output:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Conditional Processing</title></head><body><paragraph>Appointments
<br/><strong>Year:</strong>2002<br/><br/><strong>
Day:
7/
4</strong><br/>
Entire day:
Independence Day<br/><br/><strong>
Day:
7/
9</strong><br/>
Entire day:
n/a
<br/><br/><strong>
Day:
7/
15</strong><br/>
Afternoon (1430):
Doctor's appointment<br/><br/><strong>
Day:
7/
15</strong><br/>
Afternoon (1620):
course<br/></p></body></html>