ISO 15924

ISO 15924, Codes for the representation of names of scripts, defines two sets of codes for a number of writing systems (scripts). Each script is given both a four-letter code and a numeric one.^[1] Script is defined as "set of graphic characters used for the written form of one or more languages".^[1]

Where possible the codes are derived from ISO 639-2 where the name of a script and the name of a language using the script are identical (example: Gujarātī ISO 639 guj, ISO 15924 Gujr). Preference is given to the 639-2 Bibliographical codes, which is different from the otherwise often preferred use of the Terminological codes.^[1]

4-letter ISO 15924 codes are incorporated into the Language Subtag Registry for IETF language tags and so can be used in file formats that make use of such language tags. For example, they can be used in HTML and XML to help Web browsers determine which typeface to use for foreign text. This way one could differentiate, for example, between Serbian written in the Cyrillic (sr-Cyrl) or Latin (sr-Latn) script, or mark romanized text as such.

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Maintenance

ISO has appointed the Unicode Consortium as the Registration Authority (RA) for the standard. In 2004, the RA appointed Michael Everson to act as Registrar. The Registrar works with a Joint Advisory Committee (JAC) in developing and implementing the standard.^[2] The JAC contains six members: the Registrar, one member from the Library of Congress, one from Standards Norway, one from the French Encyclopaedia Universalis, an officer of Unicode, and a member of Unicode. These individuals represent the interests of the ISO 15924 RA, the ISO 639-2 RA, ISO Technical Committee 37, ISO Technical Committee 46, and the ISO Coded Character Set Sub-Committee, ISO/IEC JTC1/SC2.^[3]

Script codes

Numeric ranges

000–099 Hieroglyphic and cuneiform scripts
100–199 Right-to-left alphabetic scripts
200–299 Left-to-right alphabetic scripts
300–399 Alphasyllabic scripts
400–499 Syllabic scripts
500–599 Ideographic scripts
600–699 Undeciphered scripts
700–799 Shorthands and other notations^[4]
800–899 (unassigned)
900–999 Private use, alias, special codes^[5]

Special codes

Qaaa–Qabx (900–949): 50 Codes reserved for private use.
Zsye 993: Emoji
Zinh 994: Code for inherited script
Zmth 995: Mathematical notation
Zsym 996: Symbols
Zxxx 997: Code for unwritten languages
Zyyy 998: Code for undetermined script
Zzzz 999: Code for uncoded script

Exceptionally reserved codes

Two four letter codes are reserved at the request of the Common Locale Data Repository Project (CLDR):^[6]

Root: Reserved for the language-neutral base of the CLDR locale tree
True: Reserved for the boolean value "true"

List of codes

This list of codes is from the ISO 15924 standard.^[6]

v t e ISO 15924 script codes^[a]^[b] and Unicode^[c]^[d]
ISO 15924			Script in Unicode^[e]
Code	No.	Name	Alias^[f]	Direction	Version	Characters	Remark
Qaai	908	(Private use)					Not in Unicode (Before version 5.2, this was used instead of Zinh)
Notes قالب:Cnote2 begin ^ ISO 15924 publications اعتبارا من 26 أغسطس 2018 (2018-08-26)^[تحديث] ^ ISO 15924 Normative text file اعتبارا من 26 أغسطس 2018 (2018-08-26)^[تحديث] ^ ISO 15924 Changes (including Aliases for Unicode; اعتبارا من 26 أغسطس 2018 (2018-08-26)^[تحديث]) ^ Unicode version 11.0 ^ Unicode charts ^ Unicode uses the "Property Value Alias" (Alias) as the script-name. These Alias names are part of Unicode and are published informatively next to ISO 15924 قالب:Cnote2 end

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Relations to other standards

The following standards are referred to as indispensable by ISO 15924.

ISO 639-2:1998 Codes for the representation of names of languages — Part 2: Alpha-3 code
ISO/IEC 9541-1:1991 Information technology — Font information interchange — Part 1: Architecture
ISO/IEC 10646-1:2000 Information technology — Universal Multiple-Octet Coded Character Set (UCS)

For definition of font and glyph the standard refers to

ISO/IEC 9541-1:1991

Around 146 scripts are defined in Unicode. Through a linkpin called "Property Value Alias", Unicode has made a 1:1 connection between a script defined, and its ISO 15924 standard. See Script (Unicode).

== المراجع ==

^ ^أ ^ب ^ت Everson, Michael. "ISO 15924:2004". Retrieved 2011-06-21.
^ Unicode - ISO 15924 Registration Authority
^ "Joint Advisory Committee ISO 15924 /RA-JAC". ISO, Unicode, Inc. & Evertype. Retrieved 2011-06-24.
^ In July, 2010, Duployan shorthand was assigned code 755, even though the 700-799 range still carried its original designation of (unassigned). Shortly thereafter, Revision 1.1 clarified that codes in the 700s were reserved for "Shorthands and other notations", although that revision is only provisional until it can be confirmed by governing committees.
^ Everson, Michael (2004-01-09). "ISO 15924:2004 Information and documentation — Codes for the representation of names of scripts". Unicode Consortium.
^ ^أ ^ب "ISO 15924:2004 – Codes for the representation of names of scripts". Unicode. 2018.
^ ^أ ^ب ^ت ^ث ^ج ^ح ^خ ^د ^ذ ^ر ^ز "Proposed New Scripts". Unicode Consortium. 2018-05-25. Retrieved 2018-09-12.
^ ^أ ^ب ^ت "Roadmap to the SMP". Unicode Consortium. 2018-08-08. Retrieved 2018-09-12.
^ Michael Everson (1997-09-18). "Proposal to encode Klingon in Plane 1 of ISO/IEC 10646-2".
^ The Unicode Consortium (2001-08-14). "Approved Minutes of the UTC 87 / L2 184 Joint Meeting".

وصلات خارجية

الكلمات الدالة:

[ISO-15924:2004-1] أ ^ب ^ت Everson, Michael. "ISO 15924:2004". Retrieved 2011-06-21.

[2] Unicode - ISO 15924 Registration Authority

[JAC_info-3] "Joint Advisory Committee ISO 15924 /RA-JAC". ISO, Unicode, Inc. & Evertype. Retrieved 2011-06-24.

[4] In July, 2010, Duployan shorthand was assigned code 755, even though the 700-799 range still carried its original designation of (unassigned). Shortly thereafter, Revision 1.1 clarified that codes in the 700s were reserved for "Shorthands and other notations", although that revision is only provisional until it can be confirmed by governing committees.

[5] Everson, Michael (2004-01-09). "ISO 15924:2004 Information and documentation — Codes for the representation of names of scripts". Unicode Consortium.

[codelist-6] أ ^ب "ISO 15924:2004 – Codes for the representation of names of scripts". Unicode. 2018.

[uniproposed-7] أ ^ب ^ت ^ث ^ج ^ح ^خ ^د ^ذ ^ر ^ز "Proposed New Scripts". Unicode Consortium. 2018-05-25. Retrieved 2018-09-12.

[roadmap-smp-8] أ ^ب ^ت "Roadmap to the SMP". Unicode Consortium. 2018-08-08. Retrieved 2018-09-12.

[9] Michael Everson (1997-09-18). "Proposal to encode Klingon in Plane 1 of ISO/IEC 10646-2".

[10] The Unicode Consortium (2001-08-14). "Approved Minutes of the UTC 87 / L2 184 Joint Meeting".

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