BS ISO/IEC 4873:1991

1 Scope
2 Conformance and implementation
2.1 Conformance
2.1.1 Conformance of information interchange
2.1.2 Conformance of devices
2.2 Implementation
3 Normative references
4 Definitions
4.1 active position
4.2 bit combination
4.3 byte 2
4.4 character
4.5 character position
4.6 coded-character-data-element (CC-data-element)
4.7 coded character set
4.8 code extension
4.9 code table
4.10 control character
4.11 control function
4.12 device
4.13 escape sequence
4.14 Final Byte
4.15 graphic character
4.16 graphic symbol
4.17 repertoire
4.18 user 3
5 Notation, code table and names
5.1 Notation
5.2 Code table
5.3 Names
6 Structure of the 8-bit code
6.1 Elements of the 8-bit code
6.2 Identification of the elements of the 8-bit code
6.3 Invocation
6.3.1 C0 set 5
6.3.2 Character SPACE
6.3.3 G0 set
6.3.4 Character DELETE
6.3.5 C1 set 5
6.3.6 G1 set
6.3.7 G2 set
6.3.8 G3 set
7 Specification of the characters of the 8-bit code
7.1 C0 set
7.2 Character ESCAPE
7.3 Character SPACE
7.4 G0 set
7.5 Character DELETE
7.6 C1 set
7.7 G1 set
7.8 G2 set
7.9 G3 set
7.10 Summary of the specification of the 8-bit code
8 Levels
8.1 Level 1
8.2 Level 2
8.3 Level 3
9 Version of the 8-bit code
9.1 Contents of a version
9.2 Unique coding of characters
10 Identification of version and level
10.1 Purpose and context of identification
10.2 Identification of level
10.3 Identification of a version
10.4 Switching from one version to another
10.5 Switching from one level to another
Annexes
A Restrictions applicable to the C0 and C1 sets
B Shift functions
C Composite graphic characters
D Use of bit combinations 00/14 and 00/15
E Main differences between the 2nd edition (1986)
       and the present (third) edition of this
       International Standard

An 8-bit code derived from, and compatible with, 7-bit coded character set specified in ISO/IEC 646. The characteristics of the 8-bit coded character set are also in conformance with the code extension techniques specified in ISO 2022.

This International Standard specifies an 8-bit code derived from, and compatible with, the 7-bit coded character set specified in ISO/IEC 646.

The characteristics of this code are also in conformance with the code extension techniques specified in ISO 2022.

This International Standard specifies an 8-bit code with a number of options. It also provides guidance on how to exercise the options to define specific versions.

This code is primarily intended for general information interchange within an 8-bit environment among data processing systems and associated equipment, and within data communication systems. The need for graphic characters and control functions in data processing has also been taken into account.

The code includes the 10 digits as well as the 52 small and capital letters of the basic Latin alphabet and may include accented letters, special Latin letters and/or the letters of one or several non-Latin alphabet(s).