Why doesn't Ideographic (ID) in UAX#14 have half-width katakana?
m_kato at ga2.so-net.ne.jp
Mon Apr 27 21:20:29 CDT 2015
http://www.unicode.org/reports/tr14/proposed.html#ID defines Ideographic
(ID). Although full-width katakana is included in ID, half-width
katakana (U+FF66 and U+FF71-U+FF9D) isn't. Why?
Also, Conditional Japanese Starter (CJ,
half-width variants such as half-width katakana letter small a.
More information about the Unicode