German sharp S uppercase mapping

[David Starner]

On Sun, Dec 1, 2024 at 3:42 PM Markus Scherer <markus.icu at gmail.com> wrote:
> No, that one is clearly a lowercase ß.

I disagree; that's clearly an eszett, between other uppercase
characters, and unless there's some linguistic weirdness going on,
like iPhone or eBook, that's a capital letter. Glyphs have to be taken
in context, and in that case, it's clear they didn't intend for one
character in the middle of the word to be lowercase. I could wonder
whether that's a bad glyph for the text, or one used by preference to
the ẞ style glyph, but in Latin-script German, in a modern Unicode
context, it makes no sense to maintain a distinction between an
uppercased lowercase ß and an uppercase ẞ. Uppercase("ß") should go to
"SS" or "ẞ", and a glyph looking like ß in an uppercase context should
be interpreted and written as U+1E9E, not U+00DF.

-- 
The standard is written in English . If you have trouble understanding
a particular section, read it again and again and again . . . Sit up
straight. Eat your vegetables. Do not mumble. -- _Pascal_, ISO 7185
(1991)