Feedback on the proposal to change U+FFFD generation when decoding ill-formed UTF-8

Richard Wordingham via Unicode unicode at
Wed May 31 00:34:06 CDT 2017

On Fri, 26 May 2017 11:22:37 -0700
Ken Whistler via Unicode <unicode at> wrote:

> On 5/26/2017 10:28 AM, Karl Williamson via Unicode wrote:
> > The link provided about the PRI doesn't lead to the comments.
> >  
> PRI #121 (August, 2008) pre-dated the practice of keeping all the 
> feedback comments together with the PRI itself in a numbered
> directory with the name "feedback.html". But the comments were
> collected together at the time and are accessible here:
> Also there was a separately submitted comment document:
> And the minutes of the pertinent UTC meeting (UTC #116):
> The minutes simply capture the consensus to adopt Option #2 from PRI 
> #121, and the relevant action items.

For Unicode members, there is also the original Unicore thread, which
starts at .

(I couldn't find anything on the general list.)

There were objections there to replacing non-shortest form sequences by
multiple ocurrences of U+FFFD.  They were rejected by those that
mattered, and so the option of a single U+FFFD was not included in the


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