Potential contradiction between the WordBreak test data and UAX #29

Tom Hacohen tom at osg.samsung.com
Wed Nov 23 05:14:09 CST 2016

On 23/11/16 11:11, Daniel Bünzli wrote:
> On Wednesday 23 November 2016 at 12:00, Tom Hacohen wrote:
>> This looks like a mistake statement rather than a binding rule.
> Well at least to me it's pretty clear that this is not the case.
>> Even if that's true, look at my second statement (which you redacted in
>> your reply):
> I'm not arguing whether the boundaries produced by this process is good or not. I'm just saying that to me, the test data is consistent with the operational model and rules of UAX#29 as it exists.

I'm arguing it's not, and I still don't agree with your understanding of 
the operational model, again, take a look at what I wrote in my last email:

Also take another look at 
specifically the table that shows another way of writing the ignore 
rule. This again shows my understanding of rule 4 is correct.

Specially look at the following equivalence:
X Y × Z W     ⇒     X (Extend | Format)* Y (Extend | Format)* × Z 
(Extend | Format)* W


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