Updates to Exceptions and BackwardCompatible Sets

Vint Cerf vint at google.com
Thu Jul 16 03:24:45 CEST 2009


yes

On Jul 15, 2009, at 5:49 PM, Mark Davis ⌛ wrote:

> I think we need to strictly forbid, for stability's sake, any  
> changes in the following direction:
> PVALID => CONTEXT* => DISALLOWED
> The whole premise for this major invalidation of existing IDNs is  
> that it be a one-time occurrence.
>
> Making any change in the other direction should probably require  
> IETF-level intervention in the near term, but as you say, might be  
> made lighter-weight over time.
> DISALLOWED => CONTEXT* => PVALID
> Does this match what you think, Vint?
>
> Mark
>
>
> On Wed, Jul 15, 2009 at 14:40, Vint Cerf <vint at google.com> wrote:
> nominally I think we hope that we will not have to deal with going
> from disallowed to contextO.
>
> I think the current view is that such changes should require IETF-
> level intervention in the near
> term although a lighter-weight process might be considered based on
> experience.
>
> Does anyone see this differently?
>
> vint
>
>
> On Jul 15, 2009, at 5:26 PM, Wil Tan wrote:
>
> > What are the WG's expectations on possible updates to the list of
> > exceptions?
> >
> > I'm not suggesting that we would update it often (or at all) but
> > *should* the need arise, e.g. to change a character currently
> > classified as DISALLOWED to CONTEXTO and define a contextual rule  
> for
> > it, what would the process look like?
> >
> > The set of code points in Exceptions (2.6 of idna-tables-05) is
> > immutable, so I presume the only way to update it would be to have a
> > new document that updates this one.
> >
> > It seems that the BackwardCompatible set can be used as a more
> > lightweight method to address this use case, though it appears to be
> > designed only for incompatible changes to Unicode version after 5.1,
> > and not for errata in version 5.1 itself.
> >
> > I don't pretend to have completely read all the relevant drafts,  
> so I
> > may have completely missed the point. If so, please point me in the
> > right materials.
> >
> > =wil
> > _______________________________________________
> > Idna-update mailing list
> > Idna-update at alvestrand.no
> > http://www.alvestrand.no/mailman/listinfo/idna-update
>
> _______________________________________________
> Idna-update mailing list
> Idna-update at alvestrand.no
> http://www.alvestrand.no/mailman/listinfo/idna-update
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.alvestrand.no/pipermail/idna-update/attachments/20090715/fe343f2d/attachment.htm 


More information about the Idna-update mailing list