I think a better solution to this problem is to have a post-processing step for display, where the lowercase sigma is mapped to a final form according to the rules in Ch. 3 of the Unicode Standard. That would show <a href="http://σωτήρης.com.cy">σωτήρης.com.cy</a> properly, and maintain compatibility. The only case where something extra needs to be done is when a label has multiple words -- people would need to have a hyphen in labels after final sigmas. That is, you'd see <a href="http://σωτήρης-σωτήρης.com.cy">σωτήρης-σωτήρης.com.cy</a> if the hyphen is used, instead of <a href="http://σωτήρησσωτήρης.com.cy">σωτήρησσωτήρης.com.cy</a> if it weren't.<br>
<br>Mark<br><br>(There are messages with more background on why for comparison both Σ and ς are converted to σ in the archives; it's also discussed in the Unicode Standard, see <a href="http://www.unicode.org.">http://www.unicode.org.</a>)<br>
<br><div class="gmail_quote">On Fri, Mar 28, 2008 at 10:11 AM, Patrik Fältström <<a href="mailto:patrik@frobbit.se">patrik@frobbit.se</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="Ih2E3d"><br>
On 28 mar 2008, at 17.51, John C Klensin wrote:<br>
<br>
> I personally believe that you have adequately<br>
> explained the "correct and appropriate" part in your two notes<br>
> and earlier materials posted to the list, but others may have<br>
> different opinions on that subject. For the second, it would<br>
> be useful to know exactly what your registries, and any other<br>
> registries that might have registered labels in Greek, propose<br>
> to do to deal with differences between the IDNA2003 behavior<br>
> (map to lower-case medial sigma) and your proposed IDNA200X<br>
> behavior (treat final sigma as a normal character).<br>
<br>
</div>FWIW, I completely agree with this. I personally think you have<br>
explained why you need the codepoint. What you have to explain is how<br>
incompatibility issues with IDNA2003 are dealt with.<br>
<br>
To be very explicit, the codepoint 0x03C2 was not possible to register<br>
according to IDNA2003 as it was mapped to 03C3, so it was DISALLOWED<br>
in IDNA2003, and also DISALLOWED in IDNA200X.<br>
<font color="#888888"><br>
Patrik<br>
</font><div><div></div><div class="Wj3C7c"><br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>Mark