Special charakters in rdf description

If we use a higher version then 1.3 for the PDF creation, there are special charakters in the rdf fields.

The problem is, with this charakters we couldn't parse the xml RDF Fields. The reason is, that our parser doesn't like the special charakters like 

I think that this is a but, i couldn't find a reason for this charakters and i think they are not allowed in the xml data.


GPL Ghostscript 9.04

anyone has a good suggestion for me, is this a bug?!

thanks for help