From: Neil Harris (email@example.com)
Date: Fri Nov 18 2005 - 08:14:28 CST
Mark Davis wrote:
> It is not that clear-cut. Identifiers by their nature cannot include
> all words and phrases valid in all languages. For IDN, for example,
> one can't express the perfectly reasonable English word "can't", or a
> word like "I.B.M.".
> I did introduce a proposal in March for considering the status of some
> word characters, which turned into a discussion into the UTC of
> whether to add certain items to the identifier definition.
> (I'll copy that section here for those without access:
> 0027 ; # Po APOSTROPHE
> 002D ; # Pd HYPHEN-MINUS
> 002E ; # Po FULL STOP
> 003A ; # Po COLON
> 00B7 ; # Po MIDDLE DOT
> 058A ; # Pd ARMENIAN HYPHEN
> 05F3 ; # Po HEBREW PUNCTUATION GERESH
> 05F4 ; # Po HEBREW PUNCTUATION GERSHAYIM
> 200C ; # Cf ZERO WIDTH NON-JOINER // for Indic?
> 200D ; # Cf ZERO WIDTH JOINER // for Indic?
> 2010 ; # HYPHEN
> 2019 ; # Pf RIGHT SINGLE QUOTATION MARK
> 2027 ; # Po HYPHENATION POINT
> 30A0 ; # Pd KATAKANA-HIRAGANA DOUBLE HYPHEN
> The UTC decided that against adding them to the identifier definition.
> If we were to change that for the Hebrew punctuation, we would have to
> see a documented case for it.
I think you might meet some opposition to including the following in IDNs:
APOSTROPHE (?protocol character)
FULL STOP (it's a label separator: so no chance for use in IDN labels)
COLON (a definite protocol character in URLs)
ZWNJ and ZWJ (unless Indic experts can make a _very_ good case for these
being used only in contexts where they cause _visible_ and _unambiguous_
RIGHT SINGLE QUOTATION MARK (spoof of APOSTROPHE)
HYPHENATION POINT (spoof of MIDDLE DOT)
KATAKANA-HIRAGANA DOUBLE HYPHEN (spoof of EQUALS SIGN, ?protocol character)
which leaves only
00B7 ; # Po MIDDLE DOT
058A ; # Pd ARMENIAN HYPHEN
05F3 ; # Po HEBREW PUNCTUATION GERESH
05F4 ; # Po HEBREW PUNCTUATION GERSHAYIM
as characters which I would consider possible uncontroversial candidates
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