ISO/TR 11941

ISO/TR 11941:1996 is a Korean romanization system used in International Organization for Standardization. It is mainly used in character names in Unicode and ISO/IEC 10646.
The technical report was withdrawn in December 2013.

Transliteration rules

Apostrophe

The apostrophe is used for resolving ambiguity. It is used in the following cases.

Both Method I and Method II:
* When ㅇ appears at the initial position of a non-initial syllable of a polysyllabic word
* When ㄲ, ㄸ, ㅃ, ㅉ, or ㅆ appears at the initial position of a non-initial syllable of a polysyllabic word
Method I only:
* When ㅋ, ㅌ, ㅍ, or ㅊ appears at the initial position of a non-initial syllable of a polysyllabic word

In fact, the above rules are always applied; they are applied even when there is no ambiguity.

In character names in Unicode and ISO/IEC 10646

In Unicode and ISO/IEC 10646, both Method I and Method II are used for character names.

Method I: characters in the Hangul Jamo and Hangul Compatibility Jamo blocks, U+3148 ㅈ )
Method II: characters in the Hangul Syllables block

As the apostrophe is not allowed in character names, it is always omitted. For example, 옛이응 is yes'i'eung in ISO/TR 11941, but in Unicode and ISO/IEC 10646.