Hentaigana and the Kana Supplement block

[Garth Wallace]

On Mon, Jul 27, 2015 at 4:59 PM, Markus Scherer <markus.icu at gmail.com> wrote:
> On Mon, Jul 27, 2015 at 4:46 PM, Garth Wallace <gwalla at gmail.com> wrote:
>>
>> where
>> does that leave the Kana Supplement block? That block contains only
>> two encoded characters, but was allocated 256 code points, presumably
>> for the future encoding of hentaigana. With hentaigana handled by
>> SVSes, it seems unlikely that many of those points would ever get
>> filled. I realize there's no shortage of code points in the UCS, but
>> still.
>
>
> I don't think the committee fills blocks with characters just because there
> is space and some glyphs are related :-)

Yes, but it looked like that was the intent. I'm not saying the
hentaigana should be encoded as atomic characters in that block just
because there is space; I think the SVS approach sounds like the right
one (though I'm hardly an expert on hentaigana). I'm just wondering
what's to be done with all of those code points if they won't be used
for hentaigana, since it seems unlikely that there would be many other
kana that couldn't be handled by existing characters or the proposed
SVSes. Is it possible for a block to be later renamed as something
more general to allow for some non-kana, or even to carve out some of
the empty columns for a new block? Or does the stability policy apply
to block allocations?