Lookup CONTEXTJ test

John C Klensin klensin at jck.com
Sun Jan 9 21:01:42 CET 2011

--On Sunday, January 09, 2011 16:22 +0100 Simon Josefsson
<simon at josefsson.org> wrote:

> Vint Cerf <vint at google.com> writes:
>> simon:
>> from RFC5894
> Thank you, that was the explanation I was looking for.
> I note that RFC5894 is not a normative reference from
> IDNA2008, nor a standards track document, so if we want the
> explanation in that section to have bearing on
> implementations, that should be fixed.


As the RFC 5894 text that Vint quoted indicates, the actual
rules are in RFC 5982, which is normative.  I've just looked at
those rules again and I think they are adequate and clear (but I
might be too immersed in that text for my judgment to be
reliable).  If that is not the case, then something clearly
needs to be fixed but the intention is that 5894 provides an
overview and easy-to-read explanations while 5890 through 5893
provides the specific and normative rules.

As an implementer, you should probably be looking closely at
5890 through 5893 only (plus or minus whatever you want to do
about mapping) and looking at 5894 only for help in navigating
the documents or understanding the intent of the other ones. 


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