Content-type: text/html Man page of iso2022jp


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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 SequenceCharacter Set

ESC ( JJIS X0201-1976 (left-hand part)
ESC $ @JIS X0208-1978
ESC $ ( 0 User-defined characters (This range of characters is proprietary to Compaq.)
ESC $ BJIS 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

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 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.


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)



Codeset Conversion

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Time: 02:43:05 GMT, October 02, 2010