Re: implicit weight base for U+2CEA2

From: Ken Whistler via Unicode <>
Date: Wed, 27 Sep 2017 14:29:38 -0700

On 9/27/2017 2:19 PM, Markus Scherer via Unicode wrote:
> On Wed, Sep 27, 2017 at 1:49 PM, James Tauber via Unicode
> < <>> wrote:
> I recently updated pyuca[1], my pure Python implementation of the
> Unicode Collation Algorithm to work with 8.0.0, 9.0.0, and 10.0.0
> but to get all the tests to work, I had to special case the
> implicit weight base for U+2CEA2. The spec seems to suggest the
> base should be FB80 but I had to override just that code point to
> have a base of FBC0 for the tests to pass.
> Is this a known issue with the spec or something I've missed?
> 2CEA2..2CEAF are unassigned code points for which the UCA+DUCET uses a
> base of FBC0.
> markus

And you may have a range error in Extension E to account for the test

The relevant section of CollationTest_SHIFTED_SHORT.txt has tests that
will pass only if:

2B735 < 2B81E < 2CEA2 < 2EBE1 < 2FFFE
Ext C< Ext D < Ext E < Ext F < non-character

Those are *unassigned* characters just past the assigned ranges but
still in the blocks in each of those CJK extensions. So if you have a
range error for assigned characters in Extension E, you'd get a failure
at that point in the text cases.

Received on Wed Sep 27 2017 - 16:30:11 CDT

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