Content-type: text/html Man page of iso2022

iso2022

Section: File Formats (5)
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NAME

iso2022, iso-2022, ISO-2022 - A character encoding mechanism standardized by the International Standards Organization (ISO)  

DESCRIPTION

The ISO-2022 standard defines a mechanism for handling single-byte and multibyte characters. The standard specifies four classes of character sets: The 94-charset class, which contains character sets with 94 positions (single-byte characters). Examples are the ASCII and JIS X0201 character sets. The 96-charset class, which contains character sets with 96 positions (single-byte characters). Examples are the ISO Latin series of character sets. The 94x94-charset class, which contains character sets with 94x94 positions (2-byte characters). Examples are the GB 2312 and the CNS 11643 character sets. The 96x96-charset class, which contains character sets with 96x96 positions (2-byte characters).

In the ISO-2022 standard, four registers, called G0, G1, G2 and G3, are used to reference a character set. Before a character set can be used, the character set must be assigned, or designated, to one of these registers. The designation of a character set is done by using an escape sequence in the following format:

ESC [I] F

In this format: Is an intermediate character that is used to designate a character set to one of the registers (G0, G1, G2, oR G3). Is a unique final character of a particular character set.

The designation of a character set, whose final character is F, to different registers is as follows: Designates a multibyte character set (94x94 or 96x96) to G0. Designates a character set in the 94-charset class to G0. Designates a character set in the 94-charset class to G1. Designates a character set in the 94-charset class to G2. Designates a character set in the 94-charset class to G3. Designates a character set in the 96-charset class to G1. Designates a character set in the 96-charset class to G2. Designates a character set in the 96-charset class to G3.
 

SEE ALSO

Commands: locale(1)

Others: ascii(5), i18n_intro(5), iso2022jp(5), l10n_intro(5)


 

Index

NAME
DESCRIPTION
SEE ALSO

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Time: 02:43:06 GMT, October 02, 2010