ISO-IR-111 or KOI8-E is an 8-bit character set. It is a multinational extension of KOI-8 for Belarusian, Macedonian, Serbian, and Ukrainian. 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 edition of ECMA-113, which is the Ecma International 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, was based on the 1974 edition of GOST 19768. In 1987 ECMA-113 was redesigned. These newer editions of ECMA-113 are equivalent to ISO-8859-5, 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. 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 code point.
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, and adding some graphical characters in the C1 control codes area, mainly from KOI8-R and Windows-1251.
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. Specifically, line A_ corresponds to ISO-8859-5, lines C_ through F_ correspond to Windows-1251, 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.
