iso2022jp, iso-2022-jp, ISO-2022-JP - A character encoding
system (codeset) for Japanese
The ISO-2022-JP codeset consists of the following character
sets: ASCII
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 designated. 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 HP.)
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 follows:
39h ESC $ @ 30h 21h .... ESC ( B .... CRLF
If a line starts with the JIS X0208-1978 character at row
16 column 1, followed 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).
Codeset Conversion [Toc] [Back]
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 while the string ISO-2022-JPext
indicates that user-defined characters are included in the
conversion. Refer to iconv_intro(5) for an introduction to
codeset conversion. For more information 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 or
ISO-2022-JPext_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-2022-JPext_eucJP
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-2022-JPext_SJIS
Converting from and to the Shift JIS codeset:
SJIS(5).
Note that SJIS encoding is equivalent to the
Microsoft code-page format 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.
UTF-8_ISO-2022-JP or UTF-8_ISO-2022-JPext,
ISO-2022-JP_UTF-8 or ISO-2022-JPext_UTF-8
Converting from and to the UTF-8 codeset: Unicode(5).
Commands: locale(1)
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)
iso2022jp(5)
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