Re: Combining latin small letters with diacritics

From: Philippe Verdy <>
Date: Mon, 5 Mar 2012 20:56:40 +0100

Note that the first alternative is the one used in the DAM for

But the document cited by Denis gives a much more productive way that
allows stacking any kind of letters with its diacritics. There won't
be enough space in the BMP for such Latin supplements.

The alternative could be to encode only a single combining diacritic
(or format control) meaning "Stack the next grapheme cluster above the
previous one", to override the normal side-by-side presentation of
successive grapheme clusters. and eventually a similar special
diacritic or control to create a stack below.

Le 5 mars 2012 20:44, Philippe Verdy <> a écrit :
> So what do you propose ?
> - Encoding the new precomposed pairs as a new combining character
> (there may be a lot of candidate pairs to encode, espacially in the
> Latin script),
> - or encoding a variation of the existing diacritic to mean that they
> are bound to a first-level of diacritic (here a combining letter),
> - or duplicating the encoding of the diacritics without using varation
> selectors ?
> - or using an upper layer protocol ?
> Le 5 mars 2012 20:09, Michael Everson <> a écrit :
>> On 5 Mar 2012, at 18:48, Denis Jacquerye wrote:
>>> My question really is whether they could not be seen as
>>> <comb>a<comb><comb>diaeresis</comb>, etc. Where the shape of
>>> <comb>diaeresis</comb> is contextual.
>> No, because both the combining-a and the combining-diaeresis are bound to the base letter; the combining diaeresis is not bound to the combining-a.
>> Michael Everson *
Received on Mon Mar 05 2012 - 14:00:14 CST

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