Eszett and IDNAv2 vs IDNA2008

Erik van der Poel erikv at
Sun Mar 15 18:06:22 CET 2009

I made a couple of mistakes in that email, and it may have been
confusing, so let me try again.

If HTML implementations start performing multiple lookups, we will
probably start to see Web sites that take advantage of the new xn--
names, and they may not bother with any bundling, since the browser is
performing multiple lookups.

If HTML files containing the old IDNA2003 xn-- labels don't disappear
completely, the Web site operators may feel compelled to keep those
domain names, and if those old domain names don't disappear
completely, HTML implementers may feel compelled to continue the
multiple lookup, perhaps forever.

Is this too pessimistic? Or is this realistic, due to the nature of the Web?


On Sun, Mar 15, 2009 at 9:19 AM, Erik van der Poel <erikv at> wrote:
> If IDNA2008 plug-ins start performing multiple lookups, we will
> probably see HTML files start to take advantage of that. Then, when
> the browser developers get around to implementing IDNA2008, they may
> feel compelled to perform multiple lookups too, just to make those new
> HTML files "work".
> Of course, this WG's intention is to use multiple lookup as a
> transition strategy, but if HTML files and Web sites that rely on the
> "old" lookup don't disappear completely, the browser developers may
> feel compelled to continue the multiple lookups, perhaps forever.
> Programmers often add features, but are scared to remove features, for
> fear of "breaking" something.

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