Corrigendum #9

[Asmus Freytag]

On 6/1/2014 9:07 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.)
>
>
The new text triggers some really unwarranted interpretations, which can 
invalidate the use of noncharacters for their stated purpose.

Please see my suggested text that attempts to describe both intent and 
differences in use.

A./
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