Why doesn't Ideographic (ID) in UAX#14 have half-width katakana?

[Ken Whistler]

I don't think that is the issue. U+FF9E/F are already lb=NS, which prevents
line breaks before. The issue is instead loosening up the lb class for
the halfwidth katakana syllables (from lb=AL to lb=ID), so that they *can*
break the way the regular katakana syllables do.

--Ken

On 8/19/2015 9:21 AM, fantasai wrote:
> On 05/04/2015 02:19 PM, Peter Edberg wrote:
>> I have been checking with various groups at Apple. The consensus here 
>> is that we would like to see the linebreak value for
>> halfwidth katakana changed to ID.
>
> Do we want all halfwidth kana changed to ID, or should there
> be some exception for the voicing marks (U+FF9E, U+FF9F) to
> forbid breaks before?
>
> ~fantasai
>