Yoneya san's I-D (draft-ietf-idn-jpchar-00.txt) and his presentation on Wednesday ask NamePrep to add normalization rules (or table entries) for hiragana and katakana. Namely rules for HIRAGANA LETTER KA + KATAKANA-HIRAGANA VOICED SOUND MARK -> HIRAGANA LETTER GA and alike. Because this kind of rules are not in NFKC despite there are rules such as HIRAGANA LETTER KA + COMBINING KATAKANA-HIRAGANA VOICED SOUND MARK -> HIRAGANA LETTER GA in NFKC. That said, instead of introducing many new rules into the normalization stage, introducing the following entries into the mapping table is reasonable. KATAKANA-HIRAGANA VOICE SOUND MARK -> COMBINING KATAKANA-HIRAGANA VOICED SOUND MARK KATAKANA-HIRAGANA SEMI-VOICE SOUND MARK -> COMBINING KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK Regards, Hideyo Imazu.
