true() function : boolean operator « XSLT stylesheet « XML

true() function

File: Data.xml

<?xml version="1.0" encoding="utf-8"?>
<emailList>
  <head:header xmlns:head="http://www.domain.com/namespace/header">
    <title>Email List</title>
    <maintainer>Joe</maintainer>
  </head:header>
  <person type="personal" id="p001">
    <name>person1</name>
    <email>p@hotmail.com</email>
  </person>
  <person type="work" id="p002">
    <name>person2</name>
    <email>p@hotmail.com</email>
  </person>
  <person type="personal" id="p003">
    <name>person3</name>
    <email>p3@hotmail.com</email>
  </person>
</emailList>
File: Transform.xslt
<?xml version="1.0" encoding="UTf-8" ?>
<xsl:stylesheet version="1.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="text" indent="yes" />

  <xsl:template match="/">
    <xsl:apply-templates select="emailList">
      <xsl:with-param name="bool" select="true()" />
    </xsl:apply-templates>
  </xsl:template>

  <xsl:template match="emailList">
    <xsl:param name="bool" select="true()" />
    <xsl:variable name="true" select="true()" />
    <xsl:if test="$bool = $true">
      <xsl:text>sendPage.jsp</xsl:text>
    </xsl:if>
  </xsl:template>
</xsl:stylesheet>

Output:

sendPage.jsp
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not operator