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INCITS/ISO/IEC 646 : 1991(R2018)

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

INFORMATION TECHNOLOGY - ISO 7-BIT CODED CHARACTER SET FOR INFORMATION INTERCHANGE

Available format(s)

Hardcopy , PDF

Superseded date

04-11-2024

Language(s)

English

Published date

01-01-1991

1 Scope
2 Conformance and implementation
   2.1 Conformance
   2.2 Implementation
3 Normative references
4 Definitions
   4.1 active position
   4.2 bit combination
   4.3 character
   4.4 character position
   4.5 coded character set
   4.6 coded-character-data-element (CC-data-element)
   4.7 code extension
   4.8 code table
   4.9 control character
   4.10 control function
   4.11 device
   4.12 escape sequence
   4.13 Final Byte
   4.14 graphic character
   4.15 graphic symbol
   4.16 repertoire
   4.17 user
5 Notation, code table and names
   5.1 Notation
   5.2 Code table
   5.3 Names
6 Specification of the coded character set
   6.1 Structure
   6.2 Control characters
   6.3 Character SPACE
   6.4 Graphic characters
   6.5 Character DELETE
7 Composite graphic characters
8 Versions of the coded character set
   8.1 General
   8.2 International Reference Version (IRV)
   8.3 National versions
   8.4 Application-oriented versions
9 Identification of versions
   9.1 Purpose and context of identification
   9.2 Identification of a version
10 Explanation of Code tables No. 4 and No. 5
Annexes
A Specification of the CO set
B Guidelines for standards derived from ISO/IEC 646
C Differences between the second edition (1983) and the
   present (third) edition of this International Standard

This International Standard specifies a set of 128 characters, (control characters and graphic characters such as letters, digits and symbols) with their coded representation. Most of these characters are mandatory and unchangeable, but provision is made for some flexibility to accommodate national and other requirements.

Committee
ISO/IEC JTC 1
DocumentType
Revision
Pages
20
PublisherName
Information Technology Industry Council
Status
Superseded
SupersededBy

Standards Relationship
ISO/IEC 646:1991 Identical

ISO/IEC 6429:1992 Information technology Control functions for coded character sets
ISO/IEC 2022:1994 Information technology Character code structure and extension techniques

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