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function-available returns false

Subject: function-available returns false
From: "Manfred Staudinger" <manfred.staudinger@xxxxxxxxx>
Date: Thu, 1 May 2008 18:54:59 +0200
 function-available returns false
With the stylesheet below Saxon 6.5.5 returns false for
function-available for all xslt and xpath functions. Found nothing
under "Limitations"
http://saxon.sourceforge.net/saxon6.5.5/limitations.html
Any idea?

Regards,

Manfred

XML:
<?xml version="1.0" encoding="UTF-8"?>
<html xmlns:dr="http://documenta.rudolphina.org/"
   xmlns="http://www.w3.org/1999/xhtml">
   <head>
      <title>XSLT Availability</title>
   </head>
   <body>
      <h1>XSLT 1.0</h1>
      <dr:available>
         <dr:xslt>
            <dr:functions show="false">
               <dr:f>current</dr:f>
               <dr:f>document</dr:f>
               <dr:f>element-available</dr:f>
               <dr:f>format-number</dr:f>
               <dr:f>function-available</dr:f>
               <dr:f>generate-id</dr:f>
               <dr:f>key</dr:f>
               <dr:f>system-property</dr:f>
               <dr:f>unparsed-entity-uri</dr:f>
            </dr:functions>
         </dr:xslt>
         <dr:xpath>
            <dr:functions show="false">
               <dr:f>last</dr:f>
               <dr:f>position</dr:f>
               <dr:f>count</dr:f>
               <dr:f>id</dr:f>
               <dr:f>local-name</dr:f>
               <dr:f>namespace-uri</dr:f>
               <dr:f>name</dr:f>
               <dr:f>string</dr:f>
               <dr:f>concat</dr:f>
               <dr:f>starts-with</dr:f>
               <dr:f>contains</dr:f>
               <dr:f>substring-before</dr:f>
               <dr:f>substring-after</dr:f>
               <dr:f>substring</dr:f>
               <dr:f>string-length</dr:f>
               <dr:f>normalize-space</dr:f>
               <dr:f>translate</dr:f>
               <dr:f>boolean</dr:f>
               <dr:f>not</dr:f>
               <dr:f>true</dr:f>
               <dr:f>false</dr:f>
               <dr:f>lang</dr:f>
               <dr:f>number</dr:f>
               <dr:f>sum</dr:f>
               <dr:f>floor</dr:f>
               <dr:f>ceiling</dr:f>
               <dr:f>round</dr:f>
            </dr:functions>
         </dr:xpath>
      </dr:available>
   </body>
</html>

XSLT:
<?xml version="1.0" encoding="UTF-8" ?>
<xsl:stylesheet version="1.0"
   xmlns="http://www.w3.org/1999/xhtml"
   xmlns:xhtml="http://www.w3.org/1999/xhtml"
   xmlns:dr="http://documenta.rudolphina.org/"
   exclude-result-prefixes="xhtml dr"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml"
   doctype-public="-//W3C//DTD XHTML 1.0 Strict//EN"
   doctype-system="http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"
   encoding="UTF-8" omit-xml-declaration="yes" indent="no"/>
<xsl:strip-space elements="*"/>

<xsl:template match="/">
   <xsl:apply-templates/>
</xsl:template>
<xsl:template match="*">
   <xsl:copy>
      <xsl:apply-templates select="@*|node()"/>
   </xsl:copy>
</xsl:template>
<xsl:template match="@*|text()|comment()|xhtml:br">
   <xsl:copy/>
</xsl:template>
<xsl:template match="dr:available">
   <ul xmlns="http://www.w3.org/1999/xhtml">
      <xsl:apply-templates select="@*|node()"/>
   </ul>
</xsl:template>
<xsl:template match="dr:available/*">
   <xsl:apply-templates select="@*|node()"/>
</xsl:template>

<xsl:template match="dr:available/*/*">
   <xsl:text>&#10;</xsl:text>
   <li xmlns="http://www.w3.org/1999/xhtml">
      <xsl:value-of select="concat(local-name(ancestor::*[1]), ' ',
local-name(.), ' available')"/>
      <ul xmlns="http://www.w3.org/1999/xhtml">
         <xsl:apply-templates select="node()">
            <xsl:sort select="."/>
            <xsl:with-param name="show" select="@show='true'"/>
         </xsl:apply-templates>
      </ul>
   </li>
</xsl:template>
<xsl:template match="dr:f">
<xsl:param name="show"/>
   <xsl:if test="function-available(string(.))=$show">
      <xsl:text>&#10;   </xsl:text>
      <li xmlns="http://www.w3.org/1999/xhtml">
         <xsl:value-of select="concat(., ': ', function-available(string(.)))"/>
      </li>
   </xsl:if>
</xsl:template>

</xsl:stylesheet>

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