[xslt] document() function doesn't work - my fault?

["Michael Scheibler" <m scheibler xebec de>]

Hello,

my code looks like this:

  <xsl:variable name="language" select="document('de.xml')/bundle@language"
/>

The corresponding document looks like this:

<bundle language="de">
...
</bundle>

The error in my httpd error log is this:

compilation error: file unknown-000143413712 element variable
xsl:variable : could not compile select expression
'document('de.xml')/bundle@language'

What did I do wrong? I thought that's the way it should work!! Is it
possible, that it just can't find my file?

Michael Scheibler