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 letter 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.
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Transcription
Character set
The following table shows the KOI8-RU encoding. Each character is shown with its equivalent Unicode code point.
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 | ─ 2500 |
│ 2502 |
┌ 250C |
┐ 2510 |
└ 2514 |
┘ 2518 |
├ 251C |
┤ 2524 |
┬ 252C |
┴ 2534 |
┼ 253C |
▀ 2580 |
▄ 2584 |
█ 2588 |
▌ 258C |
▐ 2590 |
9x | ░ 2591 |
▒ 2592 |
▓ 2593 |
“[a] 201C |
■ 25A0 |
∙ 2219 |
” 201D |
—[a] 2014 |
№ 2116 |
™[a] 2122 |
NBSP | » 00BB |
® 00AE |
« 00AB |
· 00B7 |
¤ 00A4 |
Ax | ═ 2550 |
║ 2551 |
╒ 2552 |
ё 0451 |
є[b][c] 0454 |
╔ 2554 |
і[b][c] 0456 |
ї[b][c] 0457 |
╗ 2557 |
╘ 2558 |
╙ 2559 |
╚ 255A |
╛ 255B |
ґ[b] 0491 |
ў[c] 045E |
╞ 255E |
Bx | ╟ 255F |
╠ 2560 |
╡ 2561 |
Ё 0401 |
Є[b][c] 0404 |
╣ 2563 |
І[b][c] 0406 |
Ї[b][c] 0407 |
╦ 2566 |
╧ 2567 |
╨ 2568 |
╩ 2569 |
╪ 256A |
Ґ[b] 0490 |
Ў[c] 040E |
© 00A9 |
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 |
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
- ^ "Code page 1167 information document". Archived from the original on 2017-01-16.
- ^ "CCSID 1167 information document". Archived from the original on 2016-03-27.
- ^ Leisher, Mark (1999-12-20), KOI8-RU Belarusian/Ukrainian Cyrillic to Unicode 2.1 mapping table, KOI8RU.TXT
- ^ Code Page CPGID 01167 (pdf) (PDF), IBM
- ^ Code Page CPGID 01167 (txt), IBM
External links
- Nechayev, Valentin (2013) [2001]. "Review of 8-bit Cyrillic encodings universe". Archived from the original on 2016-12-05. Retrieved 2016-12-05.
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