The G0, G1, G2, G3 keywords take one of the following character-set
  keywords:

         Keyword         Character set description        Internal name
         ------          -------------------------        -------------
         ASCII           ASCII character set              B
         DECSPEC         DEC Special Graphic              0
         DECSUPGR        DEC Supplemental Graphic         %5
         DECTECH         DEC Technical                    >
         ISOLATIN1       ISO Latin-1 supplemental         A
         JIS_KATAKANA    JIS-Katakana (Japanese terminal) I
         JIS_ROMAN       JIS-Roman (Japanese terminal)    J
         KANJI           DEC Kanji (Japanese terminal)    "0 (or 1 or 3)
         KOREAN          Hanji    (Korean terminal)       4
         KS_ROMAN        KS Roman (Korean terminal)       %?
         LINEDRAWING     DEC Line Drawing                 0
         USERPREF        User-preferred supplemental      <

  Or you can specify your own G0, G1, G2, or G3 94-character set
  final sequence by using the STRING= keyword.

  G0=STRING="xx" outputs "<ESC>(xx".
  G1=STRING="xx" outputs "<ESC>)xx".
  G2=STRING="xx" outputs "<ESC>*xx".
  G3=STRING="xx" outputs "<ESC>+xx".

  E.g. CHARACTER_SET=(G0=STRING="B") would be the same as
       CHARACTER_SET=(G0=ASCII)

  and  CHARACTER_SET=(G0=DECSUPGR) would be the same as
       CHARACTER_SET=(G0=STRING="%5")