| <xsl:otherwise> | |
| Defines the else or default case in an <xsl:choose> element. This element always appears inside an <xsl:choose> element, and it must always appear last. | |
| Category | |
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Subinstruction (<xsl:otherwise> always appears as part of an <xsl:choose> element). |
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| Required Attributes | |
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None. |
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| Optional Attributes | |
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None. |
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| Content | |
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A template. |
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| Appears in | |
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The <xsl:choose> element. |
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| Defined in | |
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XSLT section 9.2, Conditional Processing with xsl:choose. |
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| Example | |
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As an example, we'll use an <xsl:choose> element that cycles through a set of values for the background color of a cell in an HTML table. We'll use this XML document as our input: <?xml version="1.0"?> <list xml:lang="en"> <title>Albums I've bought recently:</title> <listitem>The Sacred Art of Dub</listitem> <listitem>Only the Poor Man Feel It</listitem> <listitem>Excitable Boy</listitem> <listitem xml:lang="sw">Aki Special</listitem> <listitem xml:lang="en-gb">Combat Rock</listitem> <listitem xml:lang="zu">Talking Timbuktu</listitem> <listitem xml:lang="jz">The Birth of the Cool</listitem> </list> Here is our stylesheet, which uses <xsl:choose> inside an <xsl:attribute> element to determine the correct value for the bgcolor attribute. We have an <xsl:otherwise> element that generates the value whitesmoke for every fourth <listitem> in our source document:
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="html"/>
<xsl:template match="/">
<html>
<head>
<title>
<xsl:value-of select="list/title"/>
</title>
</head>
<body>
<h1><xsl:value-of select="list/title"/></h1>
<table border="1">
<xsl:for-each select="list/listitem">
<tr>
<td>
<xsl:attribute name="bgcolor">
<xsl:choose>
<xsl:when test="@bgcolor">
<xsl:value-of select="@bgcolor"/>
</xsl:when>
<xsl:when test="position() mod 4 = 0">
<xsl:text>papayawhip</xsl:text>
</xsl:when>
<xsl:when test="position() mod 4 = 1">
<xsl:text>mintcream</xsl:text>
</xsl:when>
<xsl:when test="position() mod 4 = 2">
<xsl:text>lavender</xsl:text>
</xsl:when>
<xsl:otherwise>
<xsl:text>whitesmoke</xsl:text>
</xsl:otherwise>
</xsl:choose>
</xsl:attribute>
<xsl:value-of select="."/>
</td>
</tr>
</xsl:for-each>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
Here is our generated HTML document. Notice that every fourth row has a background color of whitesmoke; that value was generated by the <xsl:otherwise> element: <html> <head> <META http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Albums I've bought recently:</title> </head> <body> <h1>Albums I've bought recently:</h1> <table border="1"> <tr> <td bgcolor="mintcream">The Sacred Art of Dub</td> </tr> <tr> <td bgcolor="lavender">Only the Poor Man Feel It</td> </tr> <tr> <td bgcolor="whitesmoke">Excitable Boy</td> </tr> <tr> <td bgcolor="papayawhip">Aki Special</td> </tr> <tr> <td bgcolor="mintcream">Combat Rock</td> </tr> <tr> <td bgcolor="lavender">Talking Timbuktu</td> </tr> <tr> <td bgcolor="whitesmoke">The Birth of the Cool</td> </tr> </table> </body> </html> When rendered, our HTML document looks like Figure A-7. Document cycling among different background colors |
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