German sharp S uppercase mapping

[David Starner]

On Sun, Dec 1, 2024 at 7:54 PM Dominikus Dittes Scherkl via Unicode
<unicode at corp.unicode.org> wrote:
> But in automatic text processing the old form is simply a bug that needs
> to be fixed. The new form has to be the "default" - otherwise
> implementations will proliferate this bug forever.

Various systems take for granted that case folding is stable.
Differences in how Unicode data is interpreted has open security holes
in systems, and while this isn't particularly likely with this change,
it is possible, which is part of the reason case-folding is guaranteed
to be stable. Such a change can confuse case-insensitive filesystems,
or change the interpretation of code in case-insensitive filesystems.
The automated default isn't going to change, and German is going to
have to join Turkish in that purely default case-conversion just
doesn't work for them.

-- 
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)