Note: is it really allowed to break between a Latin letter and an half-width kana? Such sequences are frequent when there are untranslated foreign Latin (or may be Greek/Cyrillic/Hebrew/Arabic) insertions in Japanese (toponyms, trademarks, people names...), that are followed by a semantic kana terminator. If you allow this break, the terminator will loose its semantic. There are probably similar exception between [ideographs or fullwidth Latin/Greek/Cyrillic] and [half-width or full-width kana], for those script boundaries.
2015-04-28 9:47 GMT+02:00 Philippe Verdy <[email protected]>: > My feeeling is that half-width kanas behave like Latin letters and do not > even have to follow the ideographic composition square to line up with them > (unlike standard kanas). So effectively their line breaking behavior is > very different. > > Those "half-width letters" are in fact similar to linear jamos (not > composed into syllabic squares) in the Korean script, and to Bopomofo > letters. And may be we could add the CJK key letters (radicals used for > example in IDS) to this list, or Yi radicals. > > They are harmonized to be used along with other alphabetic scripts. In > fact they may even not be really "half-width" but proportional. They are > also used with non-ideographic punctuation (notably the ASCII punctuation) > and standard SPACE (U+0020). > > If rendered in vertical lines, they could be either rotated (just like > Latin letters), or not (aligned horizontallly like letters in columns of > crosswords, but they may also have proportional height, like in > Latin/Greek/Cyrillic where it is sometimes needed for example with capital > letters with stacked accents, or when using sized spaces) > > So IMHO, those "half-width" letters are in fact to be considered as > another separate script, for typographic purpose. They are "unified" with > non-halfwidth letters, only for collation with minor differences > (plain-text searching and sorting). > > > 2015-04-28 4:20 GMT+02:00 Makoto Kato <[email protected]>: > >> Hi. >> >> 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, >> http://www.unicode.org/reports/tr14/proposed.html#CJ) considers >> half-width variants such as half-width katakana letter small a. >> >> >> -- Makoto >> > >
