That public identifier references as set of entity declarations for
Added Latin 1 characters.  It specifies neither a MIME character set
nor an SGML character set:
The correct MIME character set designation is ISO-8859-1.
>From the MIME RFC, RFC1521, section 7.1.1:
   This RFC specifies the definition of the charset parameter for the
   purposes of MIME to be a unique mapping of a byte stream to glyphs, a
   mapping which does not require external profiling information.
   An initial list of predefined character set names can be found at the
   end of this section.  Additional character sets may be registered
   with IANA, although the standardization of their use requires the
   usual IESG [RFC-1340] review and approval. ...
   The defined charset values are:
   US-ASCII -- as defined in [US-ASCII].
        ISO-8859-X -- where "X" is to be replaced, as necessary, for the
             parts of ISO-8859 [ISO-8859].  Note that the ISO 646
             character sets have deliberately been omitted in favor of
             their 8859 replacements, which are the designated character
             sets for Internet mail.  As of the publication of this
             document, the legitimate values for "X" are the digits 1
             through 9.
The SGML character set is given in the SGML declaration for HTML:
CHARSET
         BASESET  "ISO 646:1983//CHARSET
                   International Reference Version (IRV)//ESC 2/5 4/0"
         DESCSET  0   9   UNUSED
                  9   2   9
                  11  2   UNUSED
                  13  1   13
                  14  18  UNUSED
                  32  95  32
                  127 1   UNUSED
     BASESET   "ISO Registration Number 100//CHARSET
                ECMA-94 Right Part of Latin Alphabet Nr. 1//ESC 2/13 4/1"
     DESCSET   128 32 UNUSED
               160 96 32
Actually, sgmls-1.1.91 on my linux box at home reported some errors
with that character set designation. I seem to recall some mail from
somebody that addressed this issue, but I have looked for it recently,
and I can't find it. If an SMGL priest would kindly give me the
correct spelling, I'd be most greatful.
Dan