RE: [gnso-idng] 3rd Draft on Sting Similarity

["Gomes, Chuck" <cgomes@xxxxxxxxxxxx>]

Eric,

I do not disagree with the fact that there can be visual similarity.
What I disagree with is that visual similarity is the lowest common
denominator.

Chuck 

> -----Original Message-----
> From: Eric Brunner-Williams [mailto:ebw@xxxxxxxxxxxxxxxxxxxx] 
> Sent: Tuesday, December 15, 2009 2:19 PM
> To: Gomes, Chuck
> Cc: Avri Doria; gnso-idng@xxxxxxxxx
> Subject: Re: [gnso-idng] 3rd Draft on Sting Similarity
> 
> On 12/15/09 9:23 AM, Gomes, Chuck wrote:
> 
> > I disagree with you that we all agree that visual 
> similarity as the lowest common denominator. ...
> 
> 
> We have, in John Klensin's draft-ietf-idnabis-defs-08.txt, this:
> 
> 
> 4.3.  Visually Similar Characters
> 
>    To help prevent confusion between characters that are visually
>    similar, it is suggested that implementations provide visual
>    indications where a domain name contains multiple scripts, 
> especially
>    when the scripts contain characters that are easily confused
>    visually, such as an omicron in Greek mixed with Latin text.  Such
>    mechanisms can also be used to show when a name contains a 
> mixture of
>    simplified and traditional Chinese characters, or to 
> distinguish zero
>    and one from upper-case "O" and lower-case "L".  DNS zone
>    administrators may impose restrictions (subject to the limitations
>    identified elsewhere in these documents) that try to minimize
>    characters that have similar appearance or similar interpretations.
>    It is worth noting that there are no comprehensive technical
>    solutions to the problems of confusable characters.  One can reduce
>    the extent of the problems in various ways, but probably never
>    eliminate it.  Some specific suggestions about identification and
>    handling of confusable characters appear in a Unicode Consortium
>    publication [Unicode-UTR36].
> 
> I can't come up with anything from the IDNAbis work that met 
> consensus.
> We're still arguing, of course. Steve Crocker and Pat Kane 
> are now doing cameos.
> 
> Related, we're arguing in DNSEXT, over if, and how to alias.
> 
> I don't know what is "more common" than the glyph similarity problem.
> 
> Eric
>