For the Docbook DTD we've decided that to handle element-level
charset shifts we need CHARSET, LANG, and COUNTRY common attributes.
But shifting between charsets at arbitrary points is more
complicated, and we've been waiting for SGML Open to indicate
the manner in which vendors are willing to support it, so haven't
implemented anything.
Regards,
-- Terry Allen (terry@ora.com) Editor, Digital Media Group O'Reilly & Associates, Inc. Sebastopol, Calif., 95472