ISO/IEC 2375:2003

INTERNATIONAL ISO/IEC
STANDARD 2375
First edition
2003-02-15
Information technology — Procedure for
registration of escape sequences and
coded character sets
Technologies de l'information — Procédure pour l'enregistrement des
séquences d'échappement et des jeux de caractères codés

Reference number
©
ISO/IEC 2003
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©  ISO/IEC 2003
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ii © ISO/IEC 2003 – All rights reserved

Contents
Page
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3 Terms and definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
4 International Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
5 ISO/IEC supervisory body. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
6 Registration Authority. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
7 Owner of Origin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
8 Copyright Owner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
9 Sponsoring Authority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
10 The Registration Authority’s Joint Advisory Committee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
11 Application for registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
12 Registration procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
13 Technical review of mapping to ISO/IEC 10646 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
14 Processing of an approved application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
15 Appeals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
16 Corrections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
17 Revisions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
18 Withdrawal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Annex A: Details of registrations in the International Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Annex B: Coded character sets with special consideration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Annex C: Criteria for the allocation of ESC F sequences. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
s
Annex D: Layout of code tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Annex E: Example of a mapping table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Annex F: Flow chart of registration process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Annex G: Principal differences between this first edition of ISO/IEC 2375
and the third edition of ISO 2375 (1985-11-01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
© ISO/IEC 2003 – All rights reserved iii

Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO or IEC participate in the development of International Standards through technical committees
established by the respective organization to deal with particular fields of technical activity. ISO and IEC
technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. Draft International
Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as
an International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 2375 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 2, Coded character sets.
This first edition of ISO/IEC 2375 cancels and replaces ISO 2375:1985, which has been technically revised.

iv © ISO/IEC 2003 – All rights reserved

Introduction
International standard coded character sets have been adopted for the interchange of information between

information processing systems and within message transmission systems. However, circumstances occur where
applications require characters which are not included in a single international standard character code or which are
in a character code which is not an international standard.
Provision for additional characters is made by code extension techniques in which the additional coded character
sets are identified by escape sequences. The procedures for code extension and the structure and use of escape
sequences are fully documented in ISO/IEC 2022, which defines classes of escape sequences, but does not assign
specific meanings to individual escape sequences. Instead, it depends on this standard, ISO/IEC 2375, and the
associated International Registry, to assign the meanings.
This International Standard specifies the procedures to be followed in preparing and maintaining a register of
specific escape-sequence meanings. The register associates escape sequences with specific coded character sets.
The purpose of this register is to inform interested parties about coded character sets already developed and of the
specific escape sequences assigned to them.
The publication of the register should promote compatibility in international information interchange and avoid
duplication of effort in developing application-oriented coded character sets. Registration provides a standardized
identifier for a coded character set, but it is not a procedure to standardize a coded character set. Nevertheless, as
a matter apart from registration the coded character set may, but need not, be the subject of an international,
national, or other standard. When such a standard is prepared after the registration of an escape sequence, it would
be appropriate to specify the escape sequence which identifies the coded character set in the standard itself.
© ISO/IEC 2003 – All rights reserved v

INTERNATIONAL STANDARD ISO/IEC 2375:2003(E)

Information technology – Procedure for registration of
escape sequences and coded character sets
ISO/IEC 646: 1991, Information technology – ISO 7-bit
1 Scope
coded character set for information interchange
1.1 This International Standard specifies the
ISO/IEC 2022: 1994, Information technology –
procedures to be followed for preparing, maintaining,
Character code structure and extension techniques
and publishing a register of escape sequences and of
the coded character sets they identify.
ISO/IEC 4873: 1991, Information technology – ISO 8-
bit code for information interchange – Structure and
1.2 The registration process specified in ISO/IEC 2375
rules for implementation
is not a procedure for standardization of characters or
coded character sets. Organizations that wish ISO
ISO/IEC 6429: 1992, Information technology – Control
and/or IEC to create an international standard for a
functions for coded character sets
coded character set or that wish ISO and/or IEC to
ISO/IEC 6937: 2001, Information technology – Coded
code additional characters into ISO/IEC 10646 need to
graphic set for text communication – Latin alphabet
follow the ISO/IEC procedures for doing so. In
particular,
ISO/IEC 10646-1: 2000, Information technology –
Universal Multiple-Octet Coded Character Set (UCS) –
– Registration of a coded character set according to
Part 1: Architecture and Basic Multilingual Plane
the procedures specified by this standard implies
no commitment by ISO and/or IEC to adopt the
ISO/IEC 10646-2: 2001, Information technology –
coded character set as an ISO/IEC standard.
Universal Multiple-Octet Coded Character Set (UCS) –
Part 2: Supplementary Planes
– The existence of a character in an approved
registration does not imply a commitment by ISO
ISO/IEC Directives – Procedures for the technical
and/or IEC to encode that character into ISO/IEC
work of ISO/IEC JTC 1
10646.
http://www.jtc1.org/directives/main.htm
1.3 ISO/IEC 2022 describes the escape sequences
referenced in this International Standard, except for
3 Terms and definitions
escape sequences reserved in ISO/IEC 2022 for
For the purposes of this document, the following terms
private use.
and definitions apply.
1.4 The use of these escape sequences includes code 3.1
extension, that is, the provision of additional sets of bit combination
characters, or of additional control functions, in An ordered set of bits used for the representation of
accordance with ISO/IEC 2022. characters.
3.2
1.5 An escape sequence registered in accordance
byte
with this International Standard serves as an
A bit string that is operated upon as a unit.
identification of the character, the set of characters, or
the control function associated with it in the register.
3.3
character
1.6 The registration itself does not specify the rules in
A member of a set of elements used for the
accordance with which a character or character set
organization, control, or representation of data.
identified by an escape sequence is to be used.
Rather, the registration identifies the documents (for
3.4
example, standards) which specify such rules.
coded character set; code
A set of unambiguous rules that establishes a
2 Normative references
character set and the relationship between the
characters of the set and their coded representation.
The following referenced documents are indispens-
able for the application of this document. For dated
3.5
references, only the edition cited applies. For undated
code position
references, the latest edition of the referenced
That part of a code table identified by its column and
document (including any amendments) applies.
row coordinates.
© ISO/IEC 2003 – All rights reserved

3.6
4 International Register
code table
A table showing the characters allocated to each bit
4.1 Content of the International Register
combination in a code.
The International Register of Coded Character Sets to
3.7
be used with Escape Sequences (“International
combining character
Register” or “IR”) shall consist of three parts: a set of
A member of an identified subset of the coded
registrations, mapping tables associated with
character set intended for combination (a) with the
registrations, and indices to the registrations.
preceding non-combining graphic character, or with a
sequence of combining characters preceded by a non-
4.2 Format of the International Register
combining character (as, for example, in ISO/IEC
10646), or (b) with the following non-combining
The International Register shall be available in
graphic character, or with a sequence of combining
electronic format through the Internet, and optionally
characters followed by a non-combining character (as,
on other electronic media. It may also be made
for example, in ISO/IEC 6937).
available on paper. The mapping tables to ISO/IEC
10646 for the registrations shall be made available in
3.8
a machine readable format.
combining sequence
A sequence of graphic characters consisting of
...