Eszett (Sharp-S) - 3 (was AW: Comments on idnabis-rationale-01)

[Alireza Saleh]

Dear Mark,


We also had this issue with ARABIC script and ZWNJ. But the group 
decided to allow ZWNJ in IDNA2008. If having this character is essential 
for the domains in that script we should have it and accept the 
incompatibilities.


Alireza

Mark Davis wrote:

> I can understand the desire for including ß, but I'm worried about the 
> compatibility and security aspects. An IDNA2003 implementation will 
> send "maße.com <http://masse.com>" to masse.com <http://masse.com>, 
> while an IDNA2008 implementation will send it to "maße.com 
> <http://masse.com>".
>
> Mark
>
>
> On Fri, Aug 8, 2008 at 6:52 AM, John C Klensin <klensin at jck.com 
> <mailto:klensin at jck.com>> wrote:
>
>
>
>     --On Friday, 08 August, 2008 12:46 +0200 Georg Ochsner
>     <g.ochsner at revolistic.com <mailto:g.ochsner at revolistic.com>> wrote:
>
>     >> -----Ursprüngliche Nachricht-----
>     >> Von: Marcos Sanz/Denic
>     >> Gesendet: Donnerstag, 17. Juli 2008 09:51
>     >
>     >> * Section 7.3: Just a naive question, no second meanings:
>     >> what reasons speak at the moment *against* including the
>     >> Eszett in the PVALID list under the category of exceptions?
>     >> Thanks.
>     >
>     > In my opinion if Denic agrees or just doesn't mind to add the
>     > sharp s (Eszett), then it should be done.
>
>     FWIW, I tend to agree.  In a "no mapping" world, prohibiting a
>     character just because it historically case-folded into
>     something else is fairly hard to justify.  That justification
>     gets even harder when Unicode now includes an upper-case form
>     for the character so even the historical reason for the
>     case-folding is, well, history.
>
>     The people who have been depending on the mapping to turn a
>     string whose only non-ASCII character is Eszett into an
>     all-ASCII string are going to be hurt by dropping of the
>     guarantee of that mapping, independent of whether the character
>     is now added to the PVALID list.
>
>     Registries that don't want to see Eszett in domain names in
>     their zones should simply prohibit registrations in it, thereby
>     forcing everyone to use the "ss" form.
>
>        john
>
>
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