[xmlsec] About Chinese

[lxl0621 at vip.sina.com]

when i signatured a xml file containing DTD file,it will fail if the DTD file contains Chinese . So I consider that the signature cannot recognise a Chinese DTD file so that the signature cannot process the Chinese xml file.For example: 
<!ELEMENT books (#PCDATA|Ãû×Ö|writer>
<!ELEMENT Ãû×Ö (#PCDATA)>
<!ELEMENT writer (#PCDATA)>
I asked for help .How to process DTD including Chinese word.
Can you answer me or tell me who can resolve this problem?
Thanks a lot.
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