Bidi - BN - clarifying suggestion

Harald Alvestrand harald at
Wed Sep 9 01:50:28 CEST 2009

Vint Cerf wrote:
> john,
> that is a good point - harald will that work for you?
I can't tell the difference between the two, so I'm happy with "for 
example" if John thinks it makes a difference.

In both cases, BN is allowed, and the reader is told that ZWNJ and ZWJ 
belong in that class.
>>> I think the smallest possible change that addresses the issue
>>> of BN is this:
>>> OLD:
>>>   o  BN - Boundary Neutral - control characters
>>> NEW:
>>>   o  BN - Boundary Neutral - control characters, including
>>> ZWNJ and ZWJ
>>> Those two characters are, AFAIK, the only two BN characters
>>> that are allowed by -protocol, so indicating that these two
>>> are members of BN should be a sufficient indication of why the
>>> class is included in the BIDI algorithm.
>> I can live with "including...", but this comes _really_ close to
>> requiring a change to Bidi if the list in Tables changes.  "For
>> example" would make me happier. 

More information about the Idna-update mailing list