ISO-IR-111 or KOI8-E is an 8-bit character set. It is a multinational extension of

KOI-8 KOI-8 (КОИ-8) is an 8-bit character set standardized in GOST 19768-74. Маркелова Л. Н. Эксплуатация программоуправляемой вычислительной машины «Искра 226». — М.: Ма ...

for Belarusian, Macedonian, Serbian, and

Ukrainian Ukrainian may refer to: * Something of, from, or related to Ukraine * Something relating to Ukrainians, an East Slavic people from Eastern Europe * Something relating to demographics of Ukraine in terms of demography and population of Ukraine * So ...

(except Ґґ which is added to

KOI8-F KOI8-F or KOI8 Unified is an 8-bit character set. It was designed by Peter Cassetta of Fingertip Software (now defunct) as an attempt to support all the encoded letters from both KOI8-E (ISO-IR-111) and KOI8-RU (and hence also, KOI8-U and KOI8- ...

). The name "ISO-IR-111" refers to its registration number in the

ISO-IR ISO/IEC 2022 ''Information technology—Character code structure and extension techniques'', is an ISO/ IEC standard (equivalent to the ECMA standard ECMA-35, the ANSI standard ANSI X3.41 and the Japanese Industrial Standard JIS X 0202) in the ...

registry, and denotes it as a set usable with

ISO/IEC 2022 ISO/IEC 2022 ''Information technology—Character code structure and extension techniques'', is an ISO/IEC standard (equivalent to the ECMA standard ECMA-35, the ANSI standard ANSI X3.41 and the Japanese Industrial Standard JIS X 0202) in the ...

. It was defined by the first (1986) edition of ECMA-113, which is the

Ecma International Ecma International () is a nonprofit standards organization for information and communication systems. It acquired its current name in 1994, when the European Computer Manufacturers Association (ECMA) changed its name to reflect the organization ...

standard corresponding to , and as such also corresponds to a 1987 draft version of ISO-8859-5. The published editions of instead correspond to subsequent editions of ECMA-113, which defines a different encoding.

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.

). In 1987 ECMA-113 was redesigned.ECMA-113. 8-Bit Single-Byte Coded Graphic Character Sets - Latin/Cyrillic Alphabet (2nd ed., June 1988)
/ref> These newer editions of ECMA-113 are equivalent to

ISO-8859-5 ISO/IEC 8859-5:1999, ''Information technology — 8-bit single-byte coded graphic character sets — Part 5: Latin/Cyrillic alphabet'', is part of the ISO/IEC 8859 series of ASCII-based standard character encodings, first edition published in 198 ...

, 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. Possibly as another consequence of this, 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 Windows-1251 is an 8-bit character encoding, designed to cover languages that use the Cyrillic script such as Russian, Ukrainian, Belarusian, Bulgarian, Serbian Cyrillic, Macedonian and other languages. On the web, it is the second most-used ...

. Due to concerns that existing implementations might use the RFC 1345 definition for those two labels, it was proposed that the IANA additionally recognise as a label for ECMA-113:1985 content, and the IANA presently lists that label as an alias.

Character set

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

Unicode Unicode, formally The Unicode Standard,The formal version reference is is an information technology standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems. The standard, wh ...

code point.

Extended and modified versions

A modified version named KOI8 Unified or

was used in software produced by Fingertip Software, adding the Ґ in its

KOI8-U KOI8-U (RFC 2319) is an 8-bit character encoding, designed to cover Ukrainian, which uses a Cyrillic alphabet. It is based on KOI8-R, which covers Russian and Bulgarian, but replaces eight box drawing characters with four Ukrainian letters Ґ ...

location (replacing the

soft hyphen In computing and typesetting, a soft hyphen (ISO 8859: 0xAD, Unicode , HTML:  or  or ) or syllable hyphen (EBCDIC: 0xCA), abbreviated SHY, is a code point reserved in some coded character sets for the purpose of breaki ...

and displacing the

universal currency sign The currency sign is a character (symbol), character used to denote an unspecified currency. It can be described as a circle the size of a lowercase character with four short radiating arms at 45° (NE), 135° (SE), 225° (SW) and 315° (NW). I ...

), and adding some graphical characters in the

C1 control codes The C0 and C1 control code or control character sets define control codes for use in text by computer systems that use ASCII and derivatives of ASCII. The codes represent additional information about the text, such as the position of a cursor, ...

area, mainly from

KOI8-R KOI8-R (RFC 1489) is an 8-bit character encoding, derived from the KOI-8 encoding by the programmer Andrei Chernov in 1993 and designed to cover Russian, which uses a Cyrillic alphabet. KOI8-R was based on Russian Morse code, which was created ...

and

Incorrect RFC 1345 code page

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

and

. Specifically, line A_ corresponds to ISO-8859-5, lines C_ through F_ correspond to Windows-1251 (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.

References

{{Character encoding Character sets

Naming confusion

Character set

Extended and modified versions

Incorrect RFC 1345 code page

See also

References