Shane M - 2014-07-24

When I try an XSL transform (F8) with the following stylesheet, I received an error "Cannot transform: Error at line 0: Unregistered function.

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:str="http://exslt.org/strings" extension-element-prefixes="str">
  <xsl:template match="@*|node()">
    <xsl:copy>
      <xsl:apply-templates select="@*|node()"/>
    </xsl:copy>
  </xsl:template>
  <xsl:template match="text()">
    <xsl:value-of select="str:replace(.,'7','XXX')"/>
  </xsl:template>
</xsl:stylesheet>

Either there is an error in my stylesheet or XML Copy Editor does not support EXSLT. Can you help ?