From: Richard Wordingham (email@example.com)
Date: Wed Jun 28 2006 - 16:37:50 CDT
Does anyone know of invisible encoding distinctions (*not* canonically
equivalent) actually being deliberately used by significant groups of users?
I can think of a few possibilities:
(1) <U+17D2 KHMER SIGN COENG, U+178A KHMER LETTER DA> v. <U+17D2, U+178F
KHMER LETTER TA>. It is recommended that the choice be made according to
pronunciation, but this would be unetymological in a few words.
(2) Use of <U+034F COMBINING GRAPHEME JOINER> (CGJ) to distinguish digraphs
from accidental sequences in sorting. The usual example given is Slovak
'ch'; Welsh 'ng' could also become a significant possibility. The two cases
(Hebrew and German) where it is intended to affect the rendering are not
relevant to my question.
However, I have no evidence of whether these distinctions are actually being
made by significant number of users. I can well imagine CGJ only being used
on keywords, and then only when the sorting process otherwise yields the
wrong order for the data set in actual use.
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