8-bit Character Sets - ISO/IEC 6429
This standard specifies a repertoire of a large number of control functions, giving both their definitions and their coded representations. It includes a C0 set and a C1 set that may be designated for use with any 7-bit or 8-bit code that conforms to the code structure laid down in ISO/IEC 2022, or with the universal multiple-octet coded character set of ISO/IEC 10646. The coded representation of individual control functions consists either of:
- ISO/IEC 6429:1992
- Information technology - Control functions for coded character sets (third edition).
- a single bit combination from either the C0 or the C1 set, or
- a sequence of bit combinations that starts with one from either the C0 or C1 set and which is
constructed according to specific rules that allow the end of the sequence to be determined without
detailed knowledge of the syntax of the particular function represented.
The control functions defined in ISO/IEC 6429 fall into a number of distinct categories. They are primarily concerned with:
More detail of the coding methods used, and of the control functions available for code extension, is given in the section of this guide on control functions.
- code extension;
- transmission control for coded data;
- formatting, editing and presentation of character data;
- control of ancillary devices.
The control functions for formatting, editing and presentation of character data are suitable for use in communicating page layout, either in a fixed format or in a form to allow automatic reformatting when the sender and receiver use different fonts. More specific definitions of these functions, tailored to these particular uses, are given in ISO/IEC 10538.
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