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'''[[International Organization for Standardization|ISO]] 15924''', '''Codes for the representation of names of scripts''', defines two sets of codes for a number of [[writing system]]s (scripts). Each script is given both a four-letter code and a numeric one.<ref name=ISO-15924:2004>{{cite web|last=Everson|first=Michael|title=ISO 15924:2004|url=http://unicode.org/iso15924/standard/index.html|accessdate=2011-06-21}}</ref>
Script is defined as "set of graphic characters used for the written form of one or more languages".<ref name=ISO-15924:2004 /> 

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: [[Gujarati script|Gujarātī]] ISO 639 guj, ISO 15924 Gujr). Preference is given to the 639-2 Bibliographical codes, which is different from the otherwise often favored use of the Terminological codes.<ref name=ISO-15924:2004 />

4-letter ISO 15924 codes are incorporated into the Language Subtag Registry for [[IETF language tag]]s 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 browser]]s determine which [[typeface]] to use for foreign text. This way one could differentiate, for example, between [[Serbo-Croatian|Serbian]] written in the Cyrillic (<code>sr-Cyrl</code>) or Latin (<code>sr-Latn</code>) script, or mark [[romanization|romanized]] text as such.

==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.<ref>[http://unicode.org/iso15924/ Unicode - ISO 15924 Registration Authority]</ref> The JAC contains six members: the Registrar, 1 member from the Library of Congress, 1 from Standards Norway, 1 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.<ref name="JAC info">{{cite web|title=Joint Advisory Committee ISO 15924 /RA-JAC|url=http://unicode.org/iso15924/iso15924jac.html|publisher=ISO, Unicode, Inc. & Evertype|accessdate=2011-06-24}}</ref>

==Script codes==
===Numeric ranges===
*<tt>000–099</tt> Hieroglyphic and cuneiform scripts
*<tt>100–199</tt> Right-to-left alphabetic scripts
*<tt>200–299</tt> Left-to-right alphabetic scripts
*<tt>300–399</tt> Alphasyllabic scripts
*<tt>400–499</tt> Syllabic scripts
*<tt>500–599</tt> Ideographic scripts
*<tt>600–699</tt> Undeciphered scripts
*<tt>700–799</tt> Shorthands and other notations<ref>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.</ref>
*<tt>800–899</tt> (unassigned)
*<tt>900–999</tt> Private use, alias, special codes<ref>{{cite web | last=Everson | first=Michael | authorlink=Michael Everson | title=ISO 15924:2004 Information and documentation — Codes for the representation of names of scripts | url=http://www.unicode.org/iso15924/standard/index.html | date=2004-01-09 | publisher=[[Unicode Consortium]] }}</ref>

===Special codes===
*<tt>Qaaa&mdash;Qabx (900&mdash;949)</tt>: 50 Codes reserved for private use.
*<tt>Zinh 994 </tt>: Code for inherited script
*<tt>Zmth 995 </tt>: [[Mathematical notation]]
*<tt>Zsym 996 </tt>: [[Symbols]]
*<tt>Zxxx 997 </tt>: Code for unwritten languages
*<tt>Zyyy 998 </tt>: Code for undetermined script
*<tt>Zzzz 999 </tt>: Code for uncoded script

===List of codes===
{{ISO 15924 script codes and Unicode}}

==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

==References==
{{reflist}}

==External links==
* [http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=29546 ISO 15924:2004]
* [http://www.unicode.org/iso15924/ ISO 15924 Registration Authority] ([[Unicode]])
* [http://www.unicode.org/iso15924/codelists.html Official ISO 15924 code lists]
* [http://www.unicode.org/iso15924/codechanges.html Overview of changes in time]

{{ISO 15924/footer}}
{{ISO standards}}

{{DEFAULTSORT:ISO 15924}}
[[Category:ISO standards|#15924]]
[[Category:Writing systems]]
[[Category:ISO 15924| ]]
[[শ্ৰেণী:আন্তৰ্জাতিক মান সংস্থা]]