[Gen-art] LC review: draft-ietf-idnabis-bidi-06.txt

Erik van der Poel erikv at google.com
Mon Oct 5 21:47:51 CEST 2009

Yes, this change occurred between bidi draft versions 3 and 4, and is
due to Mati's proposal. I believe he came up with that suggestion
based purely on the bidi criteria (grouping, uniqueness), and not
based on what was allowed/disallowed in the Table draft.

I think it's OK to leave CS in there, even if the Table spec excludes
all of them in the current version of Unicode. Future versions of
Unicode might introduce new CS characters that we want to allow in
IDNs, though that seems unlikely.


On Mon, Oct 5, 2009 at 12:40 PM, Andrew Sullivan <ajs at shinkuro.com> wrote:
> On Mon, Oct 05, 2009 at 12:35:29PM -0700, Kenneth Whistler wrote:
>> > At the moment, I can't reconstruct what we were thnking when we decided
>> > to allow it.
>> Neither can I.
>> > The parenthetical remark can go without great loss; nothing depends on
>> > it. But I wondre why we are allowing CS at all.
>> I think the text of idnabis-bidi-06.txt should just remove CS
>> from the list of characters allowed in either RTL labels or LTR labels.
> I seem to recall a thread some time ago (I didn't rummage through the
> archives to find it) that insisted that bidi not exclude any category
> that was not _required_ to be excluded by the bidi rule.  The idea was
> that a given category should only be ruled out by bidi if it is
> necessary for the bidi rule, and for no other reason.  Any other
> exclusions were to be covered by tables (and only tables).
> This was all part of the argument for bidi standing on its own.
> Again, I'm going exclusively from memory here.  But if I had to
> construct an argument for leaving it alone, the above would also be
> the line I'd take.  (That said, I have no strong opinion one way or
> the other.)
> A
> --
> Andrew Sullivan
> ajs at shinkuro.com
> Shinkuro, Inc.
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