Editing Windows-1254 (section)

{{Short description|Windows character set for Turkish}}
{{Infobox character encoding
| name     = Windows-1254
| mime     = windows-1254
| image    = 
| caption  = 
| alias    = cp1254 ([[Code page]] 1254)
| by       = [[Microsoft]]
| standard = [[WHATWG]] Encoding Standard
| lang     = [[Turkish language|Turkish]]
| status   =
| extends  = [[ISO 8859-9]] (without single-byte C1 controls)
| prev     = 
| next     = 
| encodes  = 
| classification = [[extended ASCII]], [[Windows-125x]]
| otherrelated = 
}}
'''Windows-1254''' is a [[code page]] used under [[Microsoft Windows]] (and for the web), to write [[Turkish language|Turkish]] that it was designed for (and the vast majority of users use it for that language, even though it can also be used for some other languages). Characters with codepoints A0 through FF are compatible with [[ISO 8859-9]], but the [[ISO/IEC 2022#Control character sets|CR range]], which is reserved for [[C1 control codes]] in ISO 8859, is instead used for additional characters (analogous to the relationship between [[ISO-8859-1]] and [[Windows-1252]]). It matches Windows-1252 except for the replacement of six [[Icelandic alphabet|Icelandic]] characters ([[Ð]]ð, [[Ý]]ý, [[Þ]]þ) with characters unique to the [[Turkish alphabet]] ([[Ğ]]ğ, [[İ]], [[dotless I|ı]], [[Ş]]ş).

The [[WHATWG]] Encoding Standard, which specifies the character encodings which are permitted in [[HTML5]] and which compliant browsers must support,<ref>{{Cite web |url=https://www.w3.org/TR/html51/syntax.html#character-encodings |title=8.2.2.3. Character encodings |work=HTML 5.1 2nd Edition |publisher=[[W3C]] |quotation=User agents must support the encodings defined in the WHATWG Encoding standard, including, but not limited to […]}}</ref> includes Windows-1254, which is used for both the Windows-1254 and ISO-8859-9 labels.<ref name="nal" /><ref name="lsbe">{{cite web |url=https://encoding.spec.whatwg.org/#legacy-single-byte-encodings |title=Legacy single-byte encodings |work=Encoding Standard |last=van Kesteren |first=Anne |author-link=Anne van Kesteren |publisher=[[WHATWG]]}}</ref> [[Unicode]] is preferred for modern applications; authors of new pages and the designers of new protocols are instructed to use [[UTF-8]] instead.<ref name="nal">{{cite web |url=https://encoding.spec.whatwg.org/#names-and-labels |title=Names and labels |work=Encoding Standard |last=van Kesteren |first=Anne |author-link=Anne van Kesteren |publisher=[[WHATWG]]}}</ref> {{As of|2023}}, less than 0.05% of all web pages use Windows-1254, and less than 0.05% use ISO-8859-9,<ref>{{cite web|url=https://w3techs.com/technologies/history_overview/character_encoding|title=Historical trends in the usage of character encodings for websites|website=w3techs.com}}</ref><ref>{{cite web|url=https://w3techs.com/faq|title=Frequently Asked Questions|website=w3techs.com}}</ref> which the WHATWG also requires web browsers to handle as Windows-1254.<ref name="nal" /> Since 2.2% of all websites located in Turkey use ISO-8859-9, plus the 1.3% that actually declare Windows-1254 used, in effect, <!-- 100-97.3 = 2.7% --> 3.5% of websites there use Windows-1254.<ref>{{cite web|url=https://w3techs.com/technologies/segmentation/sl-tr-/character_encoding|title=Distribution of character encodings among websites that use Turkey|website=w3techs.com|access-date=2023-02-23}}</ref>

[[IBM]] uses code page 1254 ([[CCSID]] 1254 and [[euro sign]] extended CCSID 5350) for Windows-1254.<ref>{{cite web|title=Code page 1254 information document|archive-url=https://web.archive.org/web/20160303214103/http://www-01.ibm.com/software/globalization/cp/cp01254.html|archive-date=2016-03-03|url=https://www-01.ibm.com/software/globalization/cp/cp01254.html}}</ref><ref>{{cite web|title=CCSID 1254 information document|archive-url=https://web.archive.org/web/20160326215218/http://www-01.ibm.com/software/globalization/ccsid/ccsid1254.html|archive-date=2016-03-26|url=http://www-01.ibm.com/software/globalization/ccsid/ccsid1254.html}}</ref><ref>{{cite web|title=CCSID 5350 information document|archive-url=https://web.archive.org/web/20141129212606/http://www-01.ibm.com/software/globalization/ccsid/ccsid5350.html|archive-date=2014-11-29|url=http://www-01.ibm.com/software/globalization/ccsid/ccsid5350.html}}</ref>