Because of the mapping required in IDNA2003, it is possible to use href="<a href="http://b%c3%bccher.de/">http://Bücher.de</a>",
as well as "<a href="http://b%c3%9ccher.de/">HTTP://BÜCHER.DE</a>", or "<a href="http://bu%cc%88%cc%88cher.de/">HTTP://BU¨CHER.DE</a>"
(where the ¨ represents a <code>
<a href="http://unicode.org/cldr/utility/character.jsp?a=0308">U+0308</a></code>
( ̈ ) COMBINING DIAERESIS), or many other variations.<br><br>According to IDNA2008, uppercase Unicode is simply illegal. href="<a href="http://b%c3%bccher.de/">http://Bücher.de</a>" would simply fail. So bundling of case variants is not necessary. However, many of us are quite concerned about the interoperability and security problems that will ensue. See the draft mapping being worked on by the Unicode consortium, so as to preserve interoperability as much as possible: <a href="http://www.unicode.org/reports/tr46/">http://www.unicode.org/reports/tr46/</a><br>
<br clear="all">Mark<br>
<br><br><div class="gmail_quote">On Tue, Feb 24, 2009 at 13:36, Shawn Steele (???) <span dir="ltr"><<a href="mailto:Shawn.Steele@microsoft.com">Shawn.Steele@microsoft.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;">
There's lots of discussion of bundling of related names instead of mapping. I'm curious how that behaves when round tripping?<br>
<br>
Presumably a registrant would like a specific name. Related names are also interesting, hence bundling, however there is probably one preferred specific name. How does the client device get from some input variant to the preferred name in the UI (eg: browser address bar)?<br>
<br>
Bundling also has some limitations. Bundling (or not) Eszett with ss may be interesting and helpful, however that won't scale to casing. Currently DNS is expected to be case insensitive, and it isn't really practical to register all the variants of some IDN form of mYdOmAiN.com. So there's still a question of mapping, clients are still going to have to do at least some mapping.<br>
<br>
- Shawn<br>
<br>
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