ISO/IEC 2022

Moz-cjk

Ecma43_versus_EUC

Character encoding standard

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ISO/IEC 2022 is an international standard for character encoding, developed by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). The standard specifies a framework for encoding character sets and provides mechanisms for switching between different character sets within a single data stream.

Overview[edit | edit source]

ISO/IEC 2022 is designed to support multiple character sets, allowing for the inclusion of characters from various languages and symbol sets. It is particularly useful in environments where multiple languages are used, such as in international communication systems.

The standard defines a structure for character codes and extension techniques, enabling the use of different character sets without conflict. It includes mechanisms for designating and invoking character sets, as well as for switching between them dynamically.

Character Sets[edit | edit source]

ISO/IEC 2022 supports a wide range of character sets, including:

ISO/IEC 646 (a 7-bit character set similar to ASCII)
ISO/IEC 8859 (a series of 8-bit character sets for different languages)
ISO/IEC 10646 (the Universal Character Set, which includes Unicode)

Escape Sequences[edit | edit source]

One of the key features of ISO/IEC 2022 is the use of escape sequences to switch between different character sets. An escape sequence is a series of bytes that signals a change in the character set being used. These sequences allow for the dynamic inclusion of characters from different sets within the same data stream.

Applications[edit | edit source]

ISO/IEC 2022 is used in various applications, including:

Email systems, particularly those that need to support multiple languages
Telecommunications systems
Text processing software

Related Standards[edit | edit source]

ISO/IEC 2022 is related to several other standards, including:

References[edit | edit source]

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