xsl parameter "ulink.footnotes" generating an error

[Erik Leunissen <e.leunissen@hccnet.nl>]

Hello all,


The statement:

    <xsl:param name="ulink.footnotes">1</xsl:param>

used in the customization layer below, triggers the following error message:

    "XPath error : Undefined namespace prefix"


Anybody know:
- whether that's merely an annoyance or a real error?
- how to prevent it from happening?


Note aside:
     I know that "ulink.show" needs to be set also,
     if one sets "ulink.footnotes" to 1, but I left
     it out from this example because it doesn't
     appear to relate to the error message.



Thanks in advance for any insight,

Erik.

====== customization script following ==

<?xml version='1.0'?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
                version="1.0">

<!-- base stylesheet upon which the customizations build -->
<xsl:import href="/usr/local/share/xml/docbook-xsl-current/fo/docbook.xsl"/>

<!-- this triggers the error message "XPath error : Undefined namespace
prefix" -->
<xsl:param name="ulink.footnotes">1</xsl:param>

</xsl:stylesheet>

== end of message ==