Re: half-brackets in the Supplemental Punctuation block

From: Philippe Verdy <>
Date: Thu, 7 Jun 2012 02:25:29 +0200

The problem is that the expected metrics of these half brackets should
batch those used for standard [brackets].

Of course kerning may be used ontextually to cancel the advance width
(this can occur in fact with many spacing characters, see for example
‹T.› or ‹L·› or ‹L’› where the dot or apostrophe contextually become
zero-width, depending on font style), but given the height of
ideographic characters in the ideographic box, and of Hangul, Kanas,
and other East-Asian scripts, I doubt that this use as zero-width
marks added around these scripts match very well.

My opinion then is that the use as East Asian mora marks is as
East-Asian specific zero-width diacritics that are not unifiable with
the standard spacing behavior of the half-bracket punctuation, and
that don't match very well in their real semantics as punctuation
marks (but this last part of the statement is questionable and may be

Note that some scripts are using non-spacing diacritics to denote
punctuations rather than to denote a semantic or phonetic modification
of characters (they are not part of the basic orthography of words to
which these diacritics are added, and are then ignorable in plain-text
searches, at least for the 3 first collation levels).
Received on Wed Jun 06 2012 - 19:28:21 CDT

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