Corrigendum #9

[Karl Williamson]

On 06/01/2014 10:07 AM, Markus Scherer wrote:
> On Sun, Jun 1, 2014 at 7:49 AM, Karl Williamson <public at khwilliamson.com
> <mailto:public at khwilliamson.com>> wrote:
>
>     Thanks, I had not thought about that.  I'm thinking wording
>     something like this is more appropriate
>
>     "Noncharacters may be openly interchanged, but it is inadvisable to
>     do so without prior agreement, since at each stage any of them might
>     be replaced by a REPLACEMENT CHARACTER or otherwise disposed of, at
>     the sole discretion of that stage's implementation."
>
>
> I think that would invite again the kinds of implementations that
> triggered Corrigendum #9, where you couldn't use CLDR files with
> Gnome-based tools (plain text editors, file diff tools, command-line
> terminal) if the files contained noncharacters. (CLDR data uses them for
> boundary mappings in collation data.)
>
> markus

I don't understand your point.  Are you saying that Gnome should not 
have the discretion to rid its inputs of noncharacters?  If so, then 
noncharacters really are just Gc=Co ones.