A dozen years ago windows-31J was created
because people noticed that there were lots of different
flavors of shift_jis floating around. Uniquely identifying
them may have made sense, however the windows-31J term has
never really been widely adopted for the windows code page 932
behavior.
So I’d like to propose the following
updates, loosly based on discussion about variants some time
ago. I’d be happy to accept other suggestions that help users
discover that some test is tagged with the less-specific
shift_jis name rather than the more specific vendor charset
name.
Name: Windows-31J
MIBenum: 2024
Source: Windows Japanese. A
variant of Shift_JIS to include
NEC special characters
(Row 13), NEC selection of IBM
extensions (Rows 89 to
92), and IBM extensions (Rows
115 to 119). The CCS's
are JIS X0201:1997,
JIS X0208:1997, and these
extensions. This charset
can be used for the
top-level media type "text", but
it is of limited or
specialized use (see RFC2278).
PCL Symbol Set id: 19K.
Windows-31J text is commonly
declared with the
shift_jis name of the parent charset.
Alias: csWindows31J
Alias: shift_jis+cp932
Name: Shift_JIS (preferred MIME name)
MIBenum: 17
Source: This charset is an extension of csHalfWidthKatakana by
adding graphic characters in JIS X 0208. The CCS's are
JIS X0201:1997 and JIS X0208:1997. The
complete definition is shown in Appendix 1 of JIS
X0208:1997.
This charset can be used for the top-level media type "text".
Several vendor specific charsets that derive from shift_jis
often use the shift_jis name instead of a more specific
vendor charset name.
Alias: MS_Kanji
Alias: csShiftJIS