ISO-IR-111

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.

KOI8-E (1986)

Alias(es)	ISO-IR-111
Language(s)	Russian, Belarusian, Macedonian, Serbian, Ukrainian (partial)
Standard	ECMA-113:1986
Classification	Extended ASCII, KOI
Extends	KOI8-B
Succeeded by	ECMA-113:1988 (ISO-8859-5)
Other related encoding(s)	KOI8-F

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
0_ 0
1_ 16
2_ 32	SP 0020	! 0021	" 0022	# 0023	$ 0024	% 0025	& 0026	' 0027	( 0028	) 0029	* 002A	+ 002B	, 002C	- 002D	. 002E	/ 002F
3_ 48	0 0030	1 0031	2 0032	3 0033	4 0034	5 0035	6 0036	7 0037	8 0038	9 0039	: 003A	; 003B	< 003C	= 003D	> 003E	? 003F
4_ 64	@ 0040	A 0041	B 0042	C 0043	D 0044	E 0045	F 0046	G 0047	H 0048	I 0049	J 004A	K 004B	L 004C	M 004D	N 004E	O 004F
5_ 80	P 0050	Q 0051	R 0052	S 0053	T 0054	U 0055	V 0056	W 0057	X 0058	Y 0059	Z 005A	[ 005B	\ 005C	] 005D	^ 005E	_ 005F
6_ 96	` 0060	a 0061	b 0062	c 0063	d 0064	e 0065	f 0066	g 0067	h 0068	i 0069	j 006A	k 006B	l 006C	m 006D	n 006E	o 006F
7_ 112	p 0070	q 0071	r 0072	s 0073	t 0074	u 0075	v 0076	w 0077	x 0078	y 0079	z 007A	{ 007B	| 007C	} 007D	~ 007E
8_ 128
9_ 144
A_ 160	NBSP 00A0	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 00AD	ў 045E	џ 045F
B_ 176	№ 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
C_ 192	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
D_ 208	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
E_ 224	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
F_ 240	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

  Letter   Number   Punctuation   Symbol   Other   Undefined

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
Standard	RFC 1345
Classification	Extended ASCII
Transforms / Encodes	ISO-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 with a heavy border.

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
8_ 128
9_ 144
A_ 160	NBSP 00A0	Ё 0401	Ђ 0402	Ѓ 0403	Є 0404	Ѕ 0405	І 0406	Ї 0407	Ј 0408	Љ 0409	Њ 040A	Ћ 040B	Ќ 040C	SHY 00AD	Ў 040E	Џ 040F
B_ 176	№ 2116	ё 0451	ђ 0452	ѓ 0453	є 0454	ѕ 0455	і 0456	ї 0457	ј 0458	љ 0459	њ 045A	ћ 045B	ќ 045C	¤ 00A4	ў 045E	џ 045F
C_ 192	А 0410	Б 0411	В 0412	Г 0413	Д 0414	Е 0415	Ж 0416	З 0417	И 0418	Й 0419	К 041A	Л 041B	М 041C	Н 041D	О 041E	П 041F
D_ 208	Р 0420	С 0421	Т 0422	У 0423	Ф 0424	Х 0425	Ц 0426	Ч 0427	Ш 0428	Щ 0429	Ъ 042A	Ы 042B	Ь 042C	Э 042D	Ю 042E	Я 042F
E_ 224	а 0430	б 0431	в 0432	г 0433	д 0434	е 0435	ж 0436	з 0437	и 0438	й 0439	к 043A	л 043B	м 043C	н 043D	о 043E	п 043F
F_ 240	р 0440	с 0441	т 0442	у 0443	ф 0444	х 0445	ц 0446	ч 0447	ш 0448	щ 0449	ъ 044A	ы 044B	ь 044C	э 044D	ю 044E	я 044F

  Letter   Number   Punctuation   Symbol   Other   Undefined   Deviating from ISO-IR-111 (excluding deviations in case only)

See also

• KOI character encodings

References

1. ECMA (1 August 1985). Right-hand Part of the Cyrillic Alphabet (PDF). ITSCJ/IPSJ. ISO-IR-111.
2. "Character Sets". IANA.
3. ECMA-113. 8-Bit Single-Byte Coded Graphic Character Sets - Latin/Cyrillic Alphabet (1st ed., June 1986)
4. 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. ECMA-113. 8-Bit Single-Byte Coded Graphic Character Sets - Latin/Cyrillic Alphabet (2nd ed., June 1988)
6. Nechayev, Valentin (2013) [2001]. "Review of 8-bit Cyrillic encodings universe". Archived from the original on 2016-12-05. Retrieved 2016-12-05.
7. 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.