Re: [precis] WGLC: draft-ietf-precis-framework-09.txt

["Martin J. Dürst" <[e-mail]>]

On 2013/10/09 5:55, Peter Saint-Andre wrote:
> On 9/11/13 8:06 PM, Joseph Yee wrote:

>> Reviewed the draft, think the approach is good.  Just one minor comment.
>>
>> Same as Florian, had the 'hmm' reaction when reading about
>> directionality and application behaviour at Section 3.1.  It seems that
>> the only application behaviour is permitted pattern.  It doesn't deal
>> with visual appearance I believed.  Maybe replace 'application
>> behaviour' with 'permitted patther of the string' (or 'allowed
>> combination of the string')?
>
> Hmm, I see why you and Florian don't like that text. :-)
>
> How about this?
>
> OLD
>     Directionality:  defines application behavior in the presence of code
>        points that have directionality, in particular right-to-left code
>        points as defined in the Unicode database (see [UAX9]).
>
> NEW
>     Directionality:  defines which strings are to be considered
>        left-to-right (LTR) and right-to-left (RTL), and the allowable
>        sequences of characters in LTR and RTL strings.

That may be an improvement, but it's missing the fact that LTR and RTL 
strings are the only two alternatives allowed.

Also, it would be good to somewhere say that there is currently no 
widely accepted and implemented solution for the display of constructs 
with mixed pieces (e.g. domain names with LTR and RTL components 
(labels), because the problem is inherently extremely hard.

Regards,   Martin.