why Tamino schema don't support encoding="gb2312" in Tamino

Hi,I found DTD and Schema support encoding=“gb2312”,when using Tamino schema editor to convert dtd with chinese charset to define,it brought a bug!
I want to know the reason!
any one can give me the answer?
thanks a lot!


the Tamino Schema Editor 2.x knows definitely nothing at all about encodings.
The Tamino Schema Editor 3.1.1 knows encodings.

Kind regards,