Understood. But we've heard a very clear statement from DENIC on the similar case, with eszett. That is, they prefer a mapping, and if there is a mapping, they want it to be the same as IDNA2003. We haven't heard a clear statement from Greek participants on the issue, so we need to work to make sure everyone understands the current situation.<br>
<br>And, the Greek case could also be handled compatibly by slight postprocessing for display and choice of names; eg, map sigma to final sigma if final. Then "Cyprus-Travel" works fine, and we don't have URLs going to two different locations.<br>
<br clear="all">Mark<br>
<br><br><div class="gmail_quote">On Thu, Apr 2, 2009 at 12:52, Harald Alvestrand <span dir="ltr"><<a href="mailto:harald@alvestrand.no">harald@alvestrand.no</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;">
<div class="im">Mark Davis wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I agree, and I think there is rough consensus to that effect.<br>
<br>
My biggest concern as far as a transitional appendix is not the Hearts and others, but the cases where IDNA2003 and IDNA2008 produce *divergent* completely valid A-Labels. For that, I think we must have a very good story because of security and interoperability issues.<br>
<br>
If we have M-Labels (whether full NFKC-CF-RDI or some subset), then it looks like the sigma and eszett would go away, so that leaves us with only two cases; ZWJ and ZWNJ. In that case the recommended transitional strategy can devolve to:<br>
<br>
* Lookup with IDNA2008. If it fails, remove any ZWJ/NJ, and try again.<br>
<br>
</blockquote></div>
if we go with lowercasing rather than casefolding, eszett and final sigma survive.<br>
<br>
If we go with lowercasing, "CyprusTravel" in Greek can be represented with a final sigma for "Cyprus"; if we go with casefolding, we end up with "cyprustravel" using a non-final sigma.<br><font color="#888888">
<br>
Harald<br>
</font></blockquote></div><br>