All, I am investigating differing behavior in various environments of the wide-character version of the C function isAlpha with respect to character U+30FC KATAKANA-HIRAGANA PROLONGED SOUND MARK. Some implementations indicate that it is alphabetic, some don't. I suspect that other characters might be subject to the same confusion.
The UNICODE documents seem abiguous on this point: the General Catetory is "Lm" which, although informative instead of normative, would seem to imply that it is alphabetic; likewise DerivedCoreProperties-4.0.0.txt indicates that it is alphabetic; but PropList-4.0.0.txt contains two records - one indicating that it is a diacritic, one that indicates it is an extender. On to my questions: Q1: Can a character be both alphabetic and diacritic? Q2: Is there a difinitive answer as to whether this is an alphabetic character? Thanks in advance for answers to these questions and/or any additional isight you can provide. Regards, Rob Mount
