Integration of BIDI into the protocol

James Mitchell james.mitchell at
Tue Aug 18 02:08:23 CEST 2009

I am not attempting to reopen discussion on inter/intra label tests.

To clarify my earlier email, I am not concerned about the display
ordering of the name in question.  The issue is a mismatch between the
registration and lookup protocols.

The registration protocol asks the question of the label '123abc', which
left-to-right is not required to satisfy BIDI.  However, the lookup
protocol says that one SHOULD apply the BIDI test (on I assume the
name).  Applying the BIDI test to this name will fail and the name will
not be looked up.

As a registry, should I allow registration of the name 123abc.RTL?
As an application, should I lookup the name 123abc.RTL?


James Mitchell

> -----Original Message-----
> From: idna-update-bounces at [mailto:idna-update-
> bounces at] On Behalf Of Andrew Sullivan
> Sent: Tuesday, 18 August 2009 1:24 AM
> To: idna-update at
> Subject: Re: Integration of BIDI into the protocol
> On Mon, Aug 17, 2009 at 01:14:46PM +0200, Harald Alvestrand wrote:
> > The WG has rejected inter-label tests, therefore all tests defined by
> > the protocol as normative (MUST or SHOULD) apply only to one label at a
> > time.
> >
> > Given the WG decision, I tried to make the BIDI document quite clear
> > that certain properties can only be guaranteed for domain names where
> > all the labels meet the test, but this is a case where people have to
> > read the warnings and do something reasonable, rather than having the
> > rules define that being unreasonable is forbidden.
> Given that I was one of the people arguing strongly against
> inter-label tests, I just want to point out that the reasons I thought
> they were a bad idea I still believe.  I think the way the current
> BIDI document normative bits stop at exactly the right point, and I'd
> be opposed to reopening this decision.
> A
> --
> Andrew Sullivan
> ajs at
> Shinkuro, Inc.
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