XSLT, document() function, filename, read non-standard/English characters (like µ)

Hi!

I am trying to load files that contain non-standard (and non-English) characters (e.g. µ), and need some help in understanding how the XSLT document() function interprets non-standard (and non-English) characters (e.g. µ).

The problem is that I can't load files with such names.

The xslt is saved and declared as UTF-8.

E.g. the xml file has an µ in its name.

This
Shows the file name as a string correctly.


This however
Gives no response. No error, no warning, no nothing. And, of course, it doesn't load the file. This is a bit strange, because normally if the document function fails to find a file it will give a warning. This could mean that the file is found, but not opened.

I transform the xslt documents with PHP 5.2 libxml library, and thus have not access to Xpath 2.0 (and its uri escape functions). However, I do not think that function will help me, I have tried replacing the µ with "%C2%B5", resulting only in a error (file not found).

Any help, pointers and directions is gratefully appreciated!