Re: Unclear text in the UBA (UAX#9) of Unicode 6.3

On Mon, Apr 21, 2014 at 06:08:12PM -0700, Asmus Freytag wrote:
> Here's the text I supplied, with numbers added for discussion. It
> definitely needs some
> editing, but the point of the exercise would be to see what:
>
> 1. A bracket pair is a pair of characters consisting of an opening
> paired bracket and a closing paired bracket such that the
> Bidi_Paired_Bracket property value of the former equals the
> latter,
> subject to the following constraints.
>
> a - both characters of a pair occur in the same isolating run
> sequence
> b - the closing character of a pair follows the opening character
> c - any bracket character can belong at most to one pair, the
> earliest possible one
> d - any bracket character not part of a pair is treated like an
> ordinary character
> e - pairs may nest properly, but their spans may not overlap
> otherwise
>
>
> 2. Bracket characters with canonical decompositions are
> supposed to be treated
> as if they had been normalized, to allow normalized and
> non-normalized text
> to give the same result.
>
>
> c) needs rewording, because it is not correct
>
> The BD16 examples show
>
> a ( b ) c ) d 2-4
> a ( b ( c ) d 4-6
>
> From that, it follows that it's not the earliest but the one with the smallest span.

Sorry, I do not see any definition here. Just a collection of words
which looks like a definition, but only locally…

And I think I can even invent an example which I cannot parse using
your definition:

  1( 2[ 3( 4] 5) 6)

Is looking-at-1 forcing match of 3-and-5? Or what?

Thanks,
Ilya
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Received on Mon Apr 21 2014 - 22:33:43 CDT