[xslt] codepoints-to-string function in xsltproc

[Vlastimil Krejcir <krejcir ics muni cz>]

  Hi,

  I am trying to use XPath function codepoints-to-string(), but xsltproc 
returning me:

xmlXPathCompOpEval: function codepoints-to-string not found
XPath error : Unregistered function

I think, the function codepoints-to-string is not implemented yet. Am I 
right? I could not find list of available function, so I could not check 
it.

Thanks for help

Vlastik