KOI8-E (1986)
Alias(es)ISO-IR-111
Language(s)Russian, Belarusian, Macedonian, Serbian, Ukrainian (partial)
StandardECMA-113:1986
ClassificationExtended ASCII, KOI
ExtendsKOI8-B
Succeeded byECMA-113:1988 (ISO-8859-5)
Other related encoding(s)KOI8-F

ISO-IR-111[1] or KOI8-E[2] is an 8-bit character set. It is a multinational extension of KOI-8 for Belarusian, Macedonian, Serbian, and Ukrainian (except Ґґ which is added to KOI8-F). The name "ISO-IR-111" refers to its registration number in the ISO-IR registry, and denotes it as a set usable with ISO/IEC 2022.

It was defined by the first (1986) edition of ECMA-113,[3] which is the Ecma International standard corresponding to ISO/IEC 8859-5, and as such also corresponds to a 1987 draft version of ISO-8859-5.[4] The published editions of ISO/IEC 8859-5 instead correspond to subsequent editions of ECMA-113, which defines a different encoding.[5]

Naming confusion

ISO-IR-111, the 1985 edition of ECMA-113 (also called "ECMA-Cyrillic" or "KOI8-E"), was based on the 1974 edition of GOST 19768 (i.e. KOI-8). In 1987 ECMA-113 was redesigned.[5] These newer editions of ECMA-113 are equivalent to ISO-8859-5,[5][6] and do not follow the KOI layout. This confusion has led to a common misconception that ISO-8859-5 was defined in or based on GOST 19768-74.[6]

Possibly as another consequence of this, RFC 1345 erroneously lists a different codepage under the names "ISO-IR-111" and "ECMA-Cyrillic", resembling ISO-8859-5 with re-ordered rows, and partially compatible with Windows-1251.[7][6] Due to concerns that existing implementations might use the RFC 1345 definition for those two labels, it was proposed that the IANA additionally recognise KOI8-E as a label for ECMA-113:1985 content,[7] and the IANA presently lists that label as an alias.[2]

Character set

The following table shows the ISO-IR-111 encoding. Each character is shown with its equivalent Unicode code point.

ISO-IR-111
0 1 2 3 4 5 6 7 8 9 A B C D E F
0x
1x
2x  SP  ! " # $ % & ' ( ) * + , - . /
3x 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
4x @ A B C D E F G H I J K L M N O
5x P Q R S T U V W X Y Z [ \ ] ^ _
6x ` a b c d e f g h i j k l m n o
7x p q r s t u v w x y z { | } ~
8x
9x
Ax NBSP ђ
0452		 ѓ
0453		 ё
0451		 є
0454		 ѕ
0455		 і
0456		 ї
0457		 ј
0458		 љ
0459		 њ
045A		 ћ
045B		 ќ
045C		 SHY ў
045E		 џ
045F
Bx №
2116		 Ђ
0402		 Ѓ
0403		 Ё
0401		 Є
0404		 Ѕ
0405		 І
0406		 Ї
0407		 Ј
0408		 Љ
0409		 Њ
040A		 Ћ
040B		 Ќ
040C		 ¤
00A4		 Ў
040E		 Џ
040F
Cx ю
044E		 а
0430		 б
0431		 ц
0446		 д
0434		 е
0435		 ф
0444		 г
0433		 х
0445		 и
0438		 й
0439		 к
043A		 л
043B		 м
043C		 н
043D		 о
043E
Dx п
043F		 я
044F		 р
0440		 с
0441		 т
0442		 у
0443		 ж
0436		 в
0432		 ь
044C		 ы
044B		 з
0437		 ш
0448		 э
044D		 щ
0449		 ч
0447		 ъ
044A
Ex Ю
042E		 А
0410		 Б
0411		 Ц
0426		 Д
0414		 Е
0415		 Ф
0424		 Г
0413		 Х
0425		 И
0418		 Й
0419		 К
041A		 Л
041B		 М
041C		 Н
041D		 О
041E
Fx П
041F		 Я
042F		 Р
0420		 С
0421		 Т
0422		 У
0423		 Ж
0416		 В
0412		 Ь
042C		 Ы
042B		 З
0417		 Ш
0428		 Э
042D		 Щ
0429		 Ч
0427		 Ъ
042A

Extended and modified versions

A modified version named KOI8 Unified or KOI8-F was used in software produced by Fingertip Software, adding the Ґ in its KOI8-U location (replacing the soft hyphen and displacing the universal currency sign), and adding some graphical characters in the C1 control codes area, mainly from KOI8-R and Windows-1251.[4][6][8][9]

Incorrect RFC 1345 code page

RFC 1345's "ECMA-Cyrillic"
Language(s)Russian, Belarusian, Macedonian, Serbian
StandardRFC 1345
ClassificationExtended ASCII
Transforms / EncodesISO-IR-111
Other related encoding(s)ISO-8859-5, Windows-1251

RFC 1345 erroneously lists a different code page under the name ISO-IR-111, encoding the same Cyrillic characters but with a different layout. It resembles a mixture of Windows-1251 and ISO-8859-5.[7] Specifically, line A_ corresponds to ISO-8859-5, lines C_ through F_ correspond to Windows-1251[6] (equivalent to lines B_ through E_ of ISO-8859-5), and line B_ nearly corresponds to line F_ of ISO-8859-5, with the exception of the § being replaced with a ¤.

Certain codes resemble ISO-IR-111 with flipped letter case, which may have contributed to the confusion. The majority differ and are shown below.

Code page erroneously labelled "ISO-IR-111" or "ECMA-Cyrillic" in RFC 1345
0 1 2 3 4 5 6 7 8 9 A B C D E F
Ax NBSP Ё Ђ Ѓ Є Ѕ І Ї Ј Љ Њ Ћ Ќ SHY Ў Џ
Bx № ё ђ ѓ є ѕ і ї ј љ њ ћ ќ ¤ ў џ
Cx А Б В Г Д Е Ж З И Й К Л М Н О П
Dx Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я
Ex а б в г д е ж з и й к л м н о п
Fx р с т у ф х ц ч ш щ ъ ы ь э ю я
  Deviating from ISO-IR-111 (excluding deviations in case only)

See also

References

  1. ↑ ECMA (1 August 1985). Right-hand Part of the Cyrillic Alphabet (PDF). ITSCJ/IPSJ. ISO-IR-111.
  2. 1 2 "Character Sets". IANA.
  3. ↑ ECMA-113. 8-Bit Single-Byte Coded Graphic Character Sets - Latin/Cyrillic Alphabet (1st ed., June 1986)
  4. 1 2 Czyborra, Roman (1998-11-30) [1998-05-25]. "The Cyrillic Charset Soup". Archived from the original on 2016-12-03. Retrieved 2016-12-03.
  5. 1 2 3 ECMA-113. 8-Bit Single-Byte Coded Graphic Character Sets - Latin/Cyrillic Alphabet (2nd ed., June 1988)
  6. 1 2 3 4 5 Nechayev, Valentin (2013) [2001]. "Review of 8-bit Cyrillic encodings universe". Archived from the original on 2016-12-05. Retrieved 2016-12-05.
  7. 1 2 3 Sokolov, Michael (2003-04-05). "ECMA-cyrillic alias iso-ir-111 sore". IETF Charsets Mailing List.
  8. ↑ "KOI8 Unified". Fingertip Software. Archived from the original on 1998-01-09. Retrieved 2020-02-11.
  9. ↑ Leisher, Mark (2008) [1998-03-05]. "KOI8 Unified Cyrillic to Unicode 2.1 mapping table". Department of Mathematical Sciences, New Mexico State University. Retrieved 2020-05-02.
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