tests/conf/variable/variable68.xsl

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

  <!-- FileName: variable68 -->
  <!-- Document: http://www.w3.org/TR/xslt -->
  <!-- DocVersion: 19991116 -->
  <!-- Section: 11.6 -->
  <!-- Creator: David Marston -->
  <!-- Purpose: Demonstrate various tests of nullness on local variables -->

<xsl:output method="xml" indent="no" encoding="UTF-8"/>

<xsl:template match="doc">
  <xsl:variable name="NotSet"/>
  <xsl:variable name="String" select="'string'"/>
  <xsl:variable name="nString" select="''"/>
  <xsl:variable name="Node" select="a"/>
  <xsl:variable name="nNode" select="b"/><!-- No element of that name in source. -->
  <out>
    <xsl:text>NotSet: </xsl:text>
    <xsl:choose>
      <xsl:when test="$NotSet = ''"><xsl:text>equals empty</xsl:text></xsl:when>
      <xsl:when test="$NotSet != ''"><xsl:text>not empty</xsl:text></xsl:when>
      <xsl:otherwise><xsl:text>neither</xsl:text></xsl:otherwise>
    </xsl:choose>
    <xsl:text>
String: </xsl:text>
    <xsl:choose>
      <xsl:when test="$String = ''"><xsl:text>equals empty</xsl:text></xsl:when>
      <xsl:when test="$String != ''"><xsl:text>not empty</xsl:text></xsl:when>
      <xsl:otherwise><xsl:text>neither</xsl:text></xsl:otherwise>
    </xsl:choose>
    <xsl:text>
nString: </xsl:text>
    <xsl:choose>
      <xsl:when test="$nString = ''"><xsl:text>equals empty</xsl:text></xsl:when>
      <xsl:when test="$nString != ''"><xsl:text>not empty</xsl:text></xsl:when>
      <xsl:otherwise><xsl:text>neither</xsl:text></xsl:otherwise>
    </xsl:choose>
    <xsl:text>
Node: </xsl:text>
    <xsl:choose>
      <xsl:when test="$Node = ''"><xsl:text>equals empty</xsl:text></xsl:when>
      <xsl:when test="$Node != ''"><xsl:text>not empty</xsl:text></xsl:when>
      <xsl:otherwise><xsl:text>neither</xsl:text></xsl:otherwise>
    </xsl:choose>
    <xsl:text>
nNode: </xsl:text>
    <xsl:choose>
      <xsl:when test="$nNode = ''"><xsl:text>equals empty</xsl:text></xsl:when>
      <xsl:when test="$nNode != ''"><xsl:text>not empty</xsl:text></xsl:when>
      <xsl:otherwise><xsl:text>neither</xsl:text></xsl:otherwise>
    </xsl:choose>
  </out>
</xsl:template>


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</xsl:stylesheet>