browser behavioral differences for IDNA

Mark Davis ☕ mark at
Wed Oct 21 21:51:48 CEST 2009

FYI, UTS 46 points to differences among browsers regarding separator
(period) behavior. See

Markus and I have further investigated some browser behavior, and have also
found differences regarding normalization behavior for IDNA. See:


On Tue, Oct 20, 2009 at 12:24, <announcements at> wrote:

> The draft UTS#46 Unicode IDNA Compatible Preprocessing has been updated.
> There are a number of new review notes pointing out issues and asking for
> feedback. There are also new tables: one comparing behavior of compatibility
> and escaped versions of FULL STOP in delimiting labels between different
> browsers, and one comparing the allowed and disallowed repertoires when
> processing IDNs according to the IDNA2003, IDNA2008, and UTS #46
> specifications. There are also many improvements and clarifications of the
> text.
> See:
> Review period closes October 26, 2009.
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