ISO/TR 11941

Vowels Apostrophe The apostrophe (') is used for resolving ambiguity. It is used in the following cases. • Both Method I and Method II: • When appears at the initial position of a non-initial syllable of a polysyllabic word (e.g. ''anc'ara/anj'ara'') • When , , , , or appears at the initial position of a non-initial syllable of a polysyllabic word (e.g. ''a'kka/a'gga'') • Method I only: • When , , , or appears at the initial position of a non-initial syllable of a polysyllabic word (e.g. ''ae'thata'') In fact, the above rules are always applied; they are applied even when there is no ambiguity (e.g. ''a'i, hyin'tteok/hyin'ddeog''). == 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 (e.g. U+1103 (), U+3148 ()) • Method II: characters in the Hangul Syllables block (e.g. U+AF43 ) As the apostrophe is not allowed in character names, it is always omitted. For example, is ''yes'i'eung'' in ISO/TR 11941, but in Unicode and ISO/IEC 10646 (e.g. U+114C ). == Notes ==