Hangul Jamo Extended-B is a Unicode block containing positional (jungseong and jongseong) forms of archaic Hangul vowel and consonant clusters. They can be used to dynamically compose syllables that are not available as precomposed Hangul syllables in Unicode; specifically, syllables that are not used in standard modern Korean.
Block
History The following Unicode-related documents record the purpose and process of defining specific characters in the Hangul Jamo Extended-B block:
Version Count L2 ID WG2 ID Document 5.2 U+D7B0..D7C6, D7CB..D7FB 72 N3168R N3168 doc) N3242 N3257 doc)
References