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KOI8-RU

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KOI8-RU
Language(s)Belarusian, Ukrainian, Russian, Bulgarian
Classification8-bit KOI, extended ASCII
ExtendsKOI8-B
Based onKOI8-U, KOI8-R
Other related encoding(s)KOI8-E, KOI8-F

KOI8-RU is an 8-bit character encoding, designed to cover Russian, Ukrainian, and Belarusian which use a Cyrillic alphabet. It is closely related to KOI8-R, which covers Russian and Bulgarian, but replaces ten box drawing characters with five Ukrainian and Belarusian letters Ґ, Є, І, Ї, and Ў in both upper case and lower case. It is even more closely related to KOI8-U, which does not include Ў but otherwise makes the same replacements. The additional letter allocations are matched by KOI8-E, except for Ґ which is added to KOI8-F.

In IBM, KOI8-RU is assigned code page/CCSID 1167.[1][2]

KOI8 remains much more commonly used than ISO 8859-5, which never really caught on. Another common Cyrillic character encoding is Windows-1251. In the future, both may eventually give way to Unicode.

KOI8 stands for Kod Obmena Informatsiey, 8 bit (Russian: Код Обмена Информацией, 8 бит) which means "Code for Information Exchange, 8 bit".

The KOI8 character sets have the property that the Russian Cyrillic letters are in pseudo-Roman order rather than the natural Cyrillic alphabetical order as in ISO 8859-5. Although this may seem unnatural, it has the useful property that if the eighth bit is stripped, the text can still be read (or at least deciphered) in case-reversed transliteration on an ordinary ASCII terminal. For instance, "Русский Текст" in KOI8-RU becomes rUSSKIJ tEKST ("Russian Text") if the 8th bit is stripped.

Character set

The following table shows the KOI8-RU encoding. Each character is shown with its equivalent Unicode code point.

KOI8-RU[3][4][5]
_0 _1 _2 _3 _4 _5 _6 _7 _8 _9 _A _B _C _D _E _F
0_
0
Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef|
1_
16
Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef| Template:Chset-color-undef|
2_
32
Template:Chset-color-misc|SP
0020
Template:Chset-color-punct|!
0021
Template:Chset-color-punct|"
0022
Template:Chset-color-punct|#
0023
Template:Chset-color-graph|$
0024
Template:Chset-color-punct|%
0025
Template:Chset-color-punct|&
0026
Template:Chset-color-punct|'
0027
Template:Chset-color-punct|(
0028
Template:Chset-color-punct|)
0029
Template:Chset-color-punct|*
002A
Template:Chset-color-graph|+
002B
Template:Chset-color-punct|,
002C
Template:Chset-color-punct|-
002D
Template:Chset-color-punct|.
002E
Template:Chset-color-punct|/
002F
3_
48
Template:Chset-color-digit|0
0030
Template:Chset-color-digit|1
0031
Template:Chset-color-digit|2
0032
Template:Chset-color-digit|3
0033
Template:Chset-color-digit|4
0034
Template:Chset-color-digit|5
0035
Template:Chset-color-digit|6
0036
Template:Chset-color-digit|7
0037
Template:Chset-color-digit|8
0038
Template:Chset-color-digit|9
0039
Template:Chset-color-punct|:
003A
Template:Chset-color-punct|;
003B
Template:Chset-color-graph|<
003C
Template:Chset-color-graph|=
003D
Template:Chset-color-graph|>
003E
Template:Chset-color-punct|?
003F
4_
64
Template:Chset-color-punct|@
0040
Template:Chset-color-letter|A
0041
Template:Chset-color-letter|B
0042
Template:Chset-color-letter|C
0043
Template:Chset-color-letter|D
0044
Template:Chset-color-letter|E
0045
Template:Chset-color-letter|F
0046
Template:Chset-color-letter|G
0047
Template:Chset-color-letter|H
0048
Template:Chset-color-letter|I
0049
Template:Chset-color-letter|J
004A
Template:Chset-color-letter|K
004B
Template:Chset-color-letter|L
004C
Template:Chset-color-letter|M
004D
Template:Chset-color-letter|N
004E
Template:Chset-color-letter|O
004F
5_
80
Template:Chset-color-letter|P
0050
Template:Chset-color-letter|Q
0051
Template:Chset-color-letter|R
0052
Template:Chset-color-letter|S
0053
Template:Chset-color-letter|T
0054
Template:Chset-color-letter|U
0055
Template:Chset-color-letter|V
0056
Template:Chset-color-letter|W
0057
Template:Chset-color-letter|X
0058
Template:Chset-color-letter|Y
0059
Template:Chset-color-letter|Z
005A
Template:Chset-color-punct|[
005B
Template:Chset-color-punct|\
005C
Template:Chset-color-punct|]
005D
Template:Chset-color-graph|^
005E
Template:Chset-color-punct|_
005F
6_
96
Template:Chset-color-graph|`
0060
Template:Chset-color-letter|a
0061
Template:Chset-color-letter|b
0062
Template:Chset-color-letter|c
0063
Template:Chset-color-letter|d
0064
Template:Chset-color-letter|e
0065
Template:Chset-color-letter|f
0066
Template:Chset-color-letter|g
0067
Template:Chset-color-letter|h
0068
Template:Chset-color-letter|i
0069
Template:Chset-color-letter|j
006A
Template:Chset-color-letter|k
006B
Template:Chset-color-letter|l
006C
Template:Chset-color-letter|m
006D
Template:Chset-color-letter|n
006E
Template:Chset-color-letter|o
006F
7_
112
Template:Chset-color-letter|p
0070
Template:Chset-color-letter|q
0071
Template:Chset-color-letter|r
0072
Template:Chset-color-letter|s
0073
Template:Chset-color-letter|t
0074
Template:Chset-color-letter|u
0075
Template:Chset-color-letter|v
0076
Template:Chset-color-letter|w
0077
Template:Chset-color-letter|x
0078
Template:Chset-color-letter|y
0079
Template:Chset-color-letter|z
007A
Template:Chset-color-punct|{
007B
Template:Chset-color-graph||
007C
Template:Chset-color-punct|}
007D
Template:Chset-color-graph|~
007E
Template:Chset-color-undef|
8_
128
Template:Chset-color-graph|
2500
Template:Chset-color-graph|
2502
Template:Chset-color-graph|
250C
Template:Chset-color-graph|
2510
Template:Chset-color-graph|
2514
Template:Chset-color-graph|
2518
Template:Chset-color-graph|
251C
Template:Chset-color-graph|
2524
Template:Chset-color-graph|
252C
Template:Chset-color-graph|
2534
Template:Chset-color-graph|
253C
Template:Chset-color-graph|
2580
Template:Chset-color-graph|
2584
Template:Chset-color-graph|
2588
Template:Chset-color-graph|
258C
Template:Chset-color-graph|
2590
9_
144
Template:Chset-color-graph|
2591
Template:Chset-color-graph|
2592
Template:Chset-color-graph|
2593
Template:Chset-color-punct-box|
201C
Template:Chset-color-graph|
25A0
Template:Chset-color-graph|
2219
Template:Chset-color-punct-box|
201D
Template:Chset-color-punct-box|
2014
Template:Chset-color-graph-box|
2116
Template:Chset-color-graph-box|
2122
Template:Chset-color-misc|NBSP
00A0
Template:Chset-color-punct-box|»
00BB
Template:Chset-color-graph-box|®
00AE
Template:Chset-color-punct-box|«
00AB
Template:Chset-color-punct|·
00B7
Template:Chset-color-graph-box|¤
00A4
A_
160
Template:Chset-color-graph|
2550
Template:Chset-color-graph|
2551
Template:Chset-color-graph|
2552
Template:Chset-color-letter|ё
0451
Template:Chset-color-letter-box|є
0454
Template:Chset-color-graph|
2554
Template:Chset-color-letter-box|і
0456
Template:Chset-color-letter-box|ї
0457
Template:Chset-color-graph|
2557
Template:Chset-color-graph|
2558
Template:Chset-color-graph|
2559
Template:Chset-color-graph|
255A
Template:Chset-color-graph|
255B
Template:Chset-color-letter-box|ґ
0491
Template:Chset-color-letter-box|ў
045E
Template:Chset-color-graph|
255E
B_
176
Template:Chset-color-graph|
255F
Template:Chset-color-graph|
2560
Template:Chset-color-graph|
2561
Template:Chset-color-letter|Ё
0401
Template:Chset-color-letter-box|Є
0404
Template:Chset-color-graph|
2563
Template:Chset-color-letter-box|І
0406
Template:Chset-color-letter-box|Ї
0407
Template:Chset-color-graph|
2566
Template:Chset-color-graph|
2567
Template:Chset-color-graph|
2568
Template:Chset-color-graph|
2569
Template:Chset-color-graph|
256A
Template:Chset-color-letter-box|Ґ
0490
Template:Chset-color-letter-box|Ў
040E
Template:Chset-color-graph|©
00A9
C_
192
Template:Chset-color-letter|ю
044E
Template:Chset-color-letter|а
0430
Template:Chset-color-letter|б
0431
Template:Chset-color-letter|ц
0446
Template:Chset-color-letter|д
0434
Template:Chset-color-letter|е
0435
Template:Chset-color-letter|ф
0444
Template:Chset-color-letter|г
0433
Template:Chset-color-letter|х
0445
Template:Chset-color-letter|и
0438
Template:Chset-color-letter|й
0439
Template:Chset-color-letter|к
043A
Template:Chset-color-letter|л
043B
Template:Chset-color-letter|м
043C
Template:Chset-color-letter|н
043D
Template:Chset-color-letter|о
043E
D_
208
Template:Chset-color-letter|п
043F
Template:Chset-color-letter|я
044F
Template:Chset-color-letter|р
0440
Template:Chset-color-letter|с
0441
Template:Chset-color-letter|т
0442
Template:Chset-color-letter|у
0443
Template:Chset-color-letter|ж
0436
Template:Chset-color-letter|в
0432
Template:Chset-color-letter|ь
044C
Template:Chset-color-letter|ы
044B
Template:Chset-color-letter|з
0437
Template:Chset-color-letter|ш
0448
Template:Chset-color-letter|э
044D
Template:Chset-color-letter|щ
0449
Template:Chset-color-letter|ч
0447
Template:Chset-color-letter|ъ
044A
E_
224
Template:Chset-color-letter|Ю
042E
Template:Chset-color-letter|А
0410
Template:Chset-color-letter|Б
0411
Template:Chset-color-letter|Ц
0426
Template:Chset-color-letter|Д
0414
Template:Chset-color-letter|Е
0415
Template:Chset-color-letter|Ф
0424
Template:Chset-color-letter|Г
0413
Template:Chset-color-letter|Х
0425
Template:Chset-color-letter|И
0418
Template:Chset-color-letter|Й
0419
Template:Chset-color-letter|К
041A
Template:Chset-color-letter|Л
041B
Template:Chset-color-letter|М
041C
Template:Chset-color-letter|Н
041D
Template:Chset-color-letter|О
041E
F_
240
Template:Chset-color-letter|П
041F
Template:Chset-color-letter|Я
042F
Template:Chset-color-letter|Р
0420
Template:Chset-color-letter|С
0421
Template:Chset-color-letter|Т
0422
Template:Chset-color-letter|У
0423
Template:Chset-color-letter|Ж
0416
Template:Chset-color-letter|В
0412
Template:Chset-color-letter|Ь
042C
Template:Chset-color-letter|Ы
042B
Template:Chset-color-letter|З
0417
Template:Chset-color-letter|Ш
0428
Template:Chset-color-letter|Э
042D
Template:Chset-color-letter|Щ
0429
Template:Chset-color-letter|Ч
0427
Template:Chset-color-letter|Ъ
042A

  Letter  Number  Punctuation  Symbol  Other  Undefined  Differences from KOI8-R


Although RFC 2319 says that character 0x95 should be U+2219 (∙), it may also be U+2022 (•) to match the bullet character in Windows-1251.

Some references have a typo and incorrectly state that character 0xB4 is U+0403, rather than the correct U+0404. This typo is present in Appendix A of RFC 2319 (but the table in the main text of the RFC gives the correct mapping).

See also

References

  1. ^ "Code page 1167 information document". Archived from the original on 2017-01-16.
  2. ^ "CCSID 1167 information document". Archived from the original on 2016-03-27.
  3. ^ Leisher, Mark (1999-12-20), KOI8-RU Belorusian/Ukrainian Cyrillic to Unicode 2.1 mapping table, KOI8RU.TXT
  4. ^ Code Page CPGID 01167 (pdf) (PDF), IBM
  5. ^ Code Page CPGID 01167 (txt), IBM

External links