iso2022jp, iso-2022-jp, ISO-2022-JP - A character encoding system (codeset)
The ISO-2022-JP codeset consists of the following character sets:
For information on the ASCII character set, refer to ascii(5).
+ JIS X0201-1976
Only the Roman letters in this character set are included. For
details, refer to deckanji(5).
+ JIS X0208-1978
+ JIS X0208-1983
JIS X0208-1983 is a revised version of JIS X0208-1978 and remapped
some characters of JIS X0208-1978 to other positions.
Before a character is used, its corresponding character set must be desig-
nated. In ISO-2022-JP, the designation of a character set is done by using
an escape sequence as follows:
Escape Sequence Character Set
ESC ( B ACSII
ESC ( J JIS X0201-1976 (left-hand part)
ESC $ @ JIS X0208-1978
ESC $ ( 0
User-defined characters (This range of
characters is proprietary to Compaq.)
ESC $ B JIS X0208-1983
It is assumed that the starting code of a line is ASCII (including CR alone
and LF alone, but not including the combination CRLF). If there are JIS
X0208 characters on a line, there must be a switch to ASCII or to the
left-hand part of JIS X0201 (Roman letters) before the end of the line (in
other words, before the CRLF, or carriage return and line feed).
For example, if a line starts with the ASCII character 9, followed by the
JIS X0208-1978 character at row 16 column 1, the line is encoded as fol-
39h ESC $ @ 30h 21h .... ESC ( B .... CRLF
If a line starts with the JIS X0208-1978 character at row 16 column 1, fol-
lowed by the ASCII character 9, then the line is encoded as follows:
ESC $ @ 30h 21h ESC ( B 39h .... CRLF
Once a character set is designated, there is no need to redesignate the
character set if the adjacent character belongs to the same character set.
For example, the following practice is not recommended:
ESC $ B .... ESC $ B ....
Currently, the operating system supports the ISO 2022-JP codeset only
through codeset converters; there is no direct support through locales or
fonts. For your options in printing and displaying Japanese characters,
refer to i18n_printing(5) and Japanese(5).
The following codeset converter pairs are available for converting Japanese
characters between ISO-2022-JP and other encoding formats. In converter
names, the string ISO-2022-JP indicates that user-defined characters are
not included in the conversion jwhile the string ISO-2022-JPext indicates
that user-defined characters are included in the convertsion. Refer to
iconv_intro(5) for an introduction to codeset conversion. For more informa-
tion about the other codeset for which ISO-2022-JP or ISO-2022-JPext is the
input or output, see the reference page specified in the list item.
+ deckanji_ISO-2022-JP or deckanji_ISO-2022-JPext, ISO-2022-JP_deckanji
Converting from and to the DEC Kanji codeset: deckanji(5).
+ eucJP_ISO-2022-JP or eucJP_ISO-2022-JPext, ISO-2022-JP_eucJP or ISO-
Converting from and to Japanese Extended UNIX Code: eucJP(5).
+ sdeckanji_ISO-2022-JP or sdeckanji_ISO-2022-JPext, ISO-2022-
JP_sdeckanji or ISO-2022-JPext_sdeckanji
Converting from and to the Super DEC Kanji codeset: sdeckanji(5).
+ SJIS_ISO-2022-JP or SJIS_ISO-2022-JPext, ISO-2022-JP_SJIS or ISO-
Converting from and to the Shift JIS codeset: SJIS(5).
Note that SJIS encoding is equivalent to the Microsoft code-page for-
mat used on PC systems. Therefore, you can use these converters to
convert Japanese characters between the ISO 2022-JP and PC code-page
formats. See code_page(5) for information on how the operating system
supports PC code pages.
Others: ascii(5), code_page(5), deckanji(5), eucJP(5), i18n_intro(5),
i18n_printing(5), iconv_intro(5), iso2022(5), Japanese(5), jiskanji(5),
l10n_intro(5), sdeckanji(5), shiftjis(5)