ISO/IEC 8859-9:1999, ''Information technology — 8-bit single-byte coded graphic character sets — Part 9: Latin alphabet No. 5'', is part of the

ISO/IEC 8859 ISO/IEC 8859 is a joint ISO and IEC series of standards for 8-bit character encodings. The series of standards consists of numbered parts, such as ISO/IEC 8859-1, ISO/IEC 8859-2, etc. There are 15 parts, excluding the abandoned ISO/IEC 8859-12. ...

series of ASCII-based standard

character encoding Character encoding is the process of assigning numbers to graphical characters, especially the written characters of human language, allowing them to be stored, transmitted, and transformed using digital computers. The numerical values tha ...

s, first edition published in 1989. It is designated ECMA-128 by

Ecma International Ecma International () is a nonprofit standards organization for information and communication systems. It acquired its current name in 1994, when the European Computer Manufacturers Association (ECMA) changed its name to reflect the organization ...

and TS 5881 as a Turkish standard. It is informally referred to as Latin-5 or ''Turkish''. It was designed to cover the

Turkish language Turkish ( , ), also referred to as Turkish of Turkey (''Türkiye Türkçesi''), is the most widely spoken of the Turkic languages, with around 80 to 90 million speakers. It is the national language of Turkey and Northern Cyprus. Significant sma ...

(which is its dominant user, even though it can be used for some other languages too), designed as being of more use than the

ISO/IEC 8859-3 ISO/IEC 8859-3:1999, ''Information technology — 8-bit single-byte coded graphic character sets — Part 3: Latin alphabet No. 3'', is part of the ISO/IEC 8859 series of ASCII-based standard character encodings, first edition published in 1988. I ...

encoding. It is identical to

ISO/IEC 8859-1 ISO/IEC 8859-1:1998, ''Information technology — 8-bit single-byte coded graphic character sets — Part 1: Latin alphabet No. 1'', is part of the ISO/IEC 8859 series of ASCII-based standard character encodings, first edition published in ...

except for the replacement of six Icelandic characters ( Ðð, Ýý, Þþ) with characters unique to the Turkish alphabet ( Ğğ, İ, ı, Şş). ISO-8859-9 is the

IANA The Internet Assigned Numbers Authority (IANA) is a standards organization that oversees global IP address allocation, autonomous system number allocation, root zone management in the Domain Name System (DNS), media types, and other Interne ...

preferred charset name for this standard when supplemented with the

C0 and C1 control codes The C0 and C1 control code or control character sets define control codes for use in text by computer systems that use ASCII and derivatives of ASCII. The codes represent additional information about the text, such as the position of a curso ...

from

ISO/IEC 6429 ISO/IEC JTC 1, entitled "Information technology", is a joint technical committee (JTC) of the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). Its purpose is to develop, maintain and ...

. In modern applications Unicode and

UTF-8 UTF-8 is a variable-length character encoding used for electronic communication. Defined by the Unicode Standard, the name is derived from ''Unicode'' (or ''Universal Coded Character Set'') ''Transformation Format 8-bit''. UTF-8 is capable of e ...

are preferred; authors of new web pages and the designers of new protocols are instructed to use

instead. As of 2022, less than 0.06% of all web pages use ISO-8859-9, while 1.9% of web pages located in Turkey declare use of ISO-8859-9. However, the

WHATWG The Web Hypertext Application Technology Working Group (WHATWG) is a community of people interested in evolving HTML and related technologies. The WHATWG was founded by individuals from Apple Inc., the Mozilla Foundation and Opera Software, l ...

Encoding Standard, which specifies the character encodings which are permitted in

HTML5 HTML5 is a markup language used for structuring and presenting content on the World Wide Web. It is the fifth and final major HTML version that is a World Wide Web Consortium (W3C) recommendation. The current specification is known as the HTML ...

and which compliant browsers must support, requires that web pages marked as ISO-8859-9 be handled as

Windows-1254 Windows-1254 is a code page used under Microsoft Windows (and for the web), to write Turkish that it was designed for (which is its dominant user, even though it can be used for some other languages too). Characters with codepoints A0 through FF ...

, which differs from ISO-8859-9 by using the CR range which ISO-8859-9 reserves for

C1 control codes The C0 and C1 control code or control character sets define control codes for use in text by computer systems that use ASCII and derivatives of ASCII. The codes represent additional information about the text, such as the position of a cursor, ...

for additional graphical characters instead (analogous to the relationship between

ISO-8859-1 ISO/IEC 8859-1:1998, ''Information technology — 8-bit single-byte coded graphic character sets — Part 1: Latin alphabet No. 1'', is part of the ISO/IEC 8859 series of ASCII-based standard character encodings, first edition published in ...

and

Windows-1252 Windows-1252 or CP-1252 ( code page 1252) is a single-byte character encoding of the Latin alphabet, used by default in the legacy components of Microsoft Windows for English and many European languages including Spanish, French, and German. ...

). Microsoft has assigned code page 28599 a.k.a. Windows-28599 to ISO-8859-9 in Windows. IBM has assigned code page 920 (

CCSID A CCSID (coded character set identifier) is a 16-bit number that represents a particular encoding of a specific code page. For example, Unicode is a code page that has several encoding (so called "transformation") forms, like UTF-8, UTF-16 and U ...

920) to ISO-8859-9. It is published by

as ECMA-128.

Codepage layout

Differences from

have the Unicode code point number below the character.

References

External links

ISO/IEC 8859-9:1999

8-Bit Single-Byte Coded Graphic Character Sets - Latin Alphabet No. 5 ''2nd edition (December 1999)''
ISO-IR 148
Right-Hand Part of Latin Alphabet No.5 ''(October 1, 1988)'' {{DEFAULTSORT:ISO IEC 8859-9 ISO/IEC 8859 Computer-related introductions in 1989

Codepage layout

See also

References

External links