Invisible letter (was Re: a character for an unknown character)

[David Corbett]

Couldn’t you use U+1D52 MODIFIER LETTER SMALL O?

(I changed the subject line because the invisible letter proposal is not
relevant to the question about a lacuna character.)

> I strongly support this. In our historical corpus of Polish
>
> http://korpusy.klf.uw.edu.pl/en/IMPACT_GT_2/
>
> we have in particular words ending with 'COMBINING LATIN SMALL LETTER
> O' (U+0366).
>
> We had to precede the character with NBSP as the vase, but to preserve
> the correct segmentation into words we had to treat NBSP as a letter.
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