![]() ISO/IEC 8859-1 code page layout | |
MIME / IANA | ISO-8859-1 |
---|---|
Alias(es) | iso-ir-100, csISOLatin1, latin1, l1, IBM819, CP819 |
Language(s) | English, various others |
Standard | ISO/IEC 8859 |
Classification | Extended ASCII, ISO/IEC 8859 |
Extends | US-ASCII |
Based on | DEC MCS |
Succeeded by | |
Other related encoding(s) | |
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 1987. ISO/IEC 8859-1 encodes what it refers to as "Latin alphabet no. 1", consisting of 191 characters from the Latin script. This character-encoding scheme is used throughout the Americas, Western Europe, Oceania, and much of Africa. It is the basis for some popular 8-bit character sets and the first two blocks of characters in Unicode.
As of July 2024[update], 1.2% of all web sites use ISO/IEC 8859-1.[1][2] It is the most declared single-byte character encoding, but as Web browsers and the HTML5 standard[3] interpret them as the superset Windows-1252, these documents may include characters from that set. Depending on the country or language, website use can be higher than the global average, in Brazil it is at 3.4%,[4] and in Germany at 2.7%.[5][6]
ISO-8859-1 was (according to the standard, at least) the default encoding of documents delivered via HTTP with a MIME type beginning with text/
, the default encoding of the values of certain descriptive HTTP headers, and defined the repertoire of characters allowed in HTML 3.2 documents. It is specified by many other standards.[example needed] In practice, the superset encoding Windows-1252 is the more likely effective default[7] and it is increasingly common for standards to (at least unofficially)[clarification needed] default to UTF-8.
ISO-8859-1 is the IANA preferred name for this standard when supplemented with the C0 and C1 control codes from ISO/IEC 6429. The following other aliases are registered: iso-ir-100, csISOLatin1, latin1, l1, IBM819. Code page 28591 a.k.a. Windows-28591 is used for it in Windows.[8] IBM calls it code page 819 or CP819 (CCSID 819).[9][10][11][12] Oracle calls it WE8ISO8859P1.[13]