Re: idna-bis and 'ß'

John C Klensin klensin at
Fri Nov 23 19:38:49 CET 2007

--On Friday, November 23, 2007 7:16 PM +0100 Harald Tveit 
Alvestrand <harald at> wrote:

> According to the tables at the back of
> draft-faltstrom-idnabis-tables-03, 0x00DF LATIN SMALL LETTER
> SHARP S is listed as NEVER.
> It's an user interface issue what to do when the user types a
> LATIN SMALL LETTER SHARP S; idnabis deliberately does not
> require that one maps it to "ss".


I should have gone back and checked the tables, rather than 
relying on memory, before sending my note.   So we have erred on 
the side of "NEVER", contrary to my assumption.  But the other 
comments in my note about the tradeoffs, as well as Harald's 
comment above, still stand.


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