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Prevent spurious namespace output from Java (xalan) XSLT 

nogeek
Joined:
03/21/2010
Posts:
49

November 04, 2010 20:24:32    Last update: November 04, 2010 20:24:55
XSLT by default writes namespace declarations in the output. Most of the time it's spurious, sometimes outright wrong.
  1. Take this XML: 
    <?xml version="1.0" encoding="ISO-8859-1"?>
<event>
    <title>A test event</title>
    <details>
	<timestamp>1288651500854</timestamp>
	<description>Something happened</description>
    </details>
</event>

  2. And this XSL: 
    <?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:java="http://xml.apache.org/xslt/java">

<xsl:output method="html"/>

<xsl:template match="/">
    <xsl:apply-templates select="event/details">
	<xsl:with-param name="title" select="title"/>
    </xsl:apply-templates>
</xsl:template>

<xsl:template match="details">
    <xsl:param name="title"/>
    Title: <xsl:value-of select="$title"/><br/>
    Timestamp: <xsl:value-of select="java:DateUtil.getDate(number(timestamp))"/><br/>
    Description: <xsl:value-of select="description"/><br/>
</xsl:template>

</xsl:stylesheet>

    where DateUtil.java is: 
    import java.util.Date;

public class DateUtil {
    public static Date getDate(long time) {
	return new Date(time);
    }
}

  3. The output is (with JDK1.6): 
        Title: <br xmlns:java="http://xml.apache.org/xslt/java">
    Timestamp: Mon Nov 01 17:45:00 CDT 2010<br>
    Description: Something happened<br>

    The namespace declaration went to the <br> element, not the timestamp where it belongs.
  4. To remove the namespace info, add exclude-result-prefixes to the XSL: 
    <?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:java="http://xml.apache.org/xslt/java"
    exclude-result-prefixes="java"> <!-- this removes namespace info -->

<xsl:output method="html"/>

<xsl:template match="/">
    <xsl:apply-templates select="event/details">
	<xsl:with-param name="title" select="title"/>
    </xsl:apply-templates>
</xsl:template>

<xsl:template match="details">
    <xsl:param name="title"/>
    Title: <xsl:value-of select="$title"/><br/>
    Timestamp: <xsl:value-of select="java:DateUtil.getDate(number(timestamp))"/><br/>
    Description: <xsl:value-of select="description"/><br/>
</xsl:template>

</xsl:stylesheet>

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