<div dir="ltr">I can understand the desire for including ß, but I'm worried about the compatibility and security aspects. An IDNA2003 implementation will send "<a href="http://masse.com">maße.com</a>" to <a href="http://masse.com">masse.com</a>, while an IDNA2008 implementation will send it to "<a href="http://masse.com">maße.com</a>".<br>
<br clear="all">Mark<br>
<br><br><div class="gmail_quote">On Fri, Aug 8, 2008 at 6:52 AM, John C Klensin <span dir="ltr"><<a href="mailto:klensin@jck.com">klensin@jck.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
<br>
--On Friday, 08 August, 2008 12:46 +0200 Georg Ochsner<br>
<div class="Ih2E3d"><<a href="mailto:g.ochsner@revolistic.com">g.ochsner@revolistic.com</a>> wrote:<br>
<br>
>> -----Ursprüngliche Nachricht-----<br>
>> Von: Marcos Sanz/Denic<br>
>> Gesendet: Donnerstag, 17. Juli 2008 09:51<br>
><br>
>> * Section 7.3: Just a naive question, no second meanings:<br>
>> what reasons speak at the moment *against* including the<br>
>> Eszett in the PVALID list under the category of exceptions?<br>
>> Thanks.<br>
><br>
> In my opinion if Denic agrees or just doesn't mind to add the<br>
> sharp s (Eszett), then it should be done.<br>
<br>
</div>FWIW, I tend to agree. In a "no mapping" world, prohibiting a<br>
character just because it historically case-folded into<br>
something else is fairly hard to justify. That justification<br>
gets even harder when Unicode now includes an upper-case form<br>
for the character so even the historical reason for the<br>
case-folding is, well, history.<br>
<br>
The people who have been depending on the mapping to turn a<br>
string whose only non-ASCII character is Eszett into an<br>
all-ASCII string are going to be hurt by dropping of the<br>
guarantee of that mapping, independent of whether the character<br>
is now added to the PVALID list.<br>
<br>
Registries that don't want to see Eszett in domain names in<br>
their zones should simply prohibit registrations in it, thereby<br>
forcing everyone to use the "ss" form.<br>
<font color="#888888"><br>
john<br>
</font><div><div></div><div class="Wj3C7c"><br>
<br>
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