Codepoints removed between IDNA200X and IDNA2003

[Patrik Fältström]

On 19 mar 2008, at 15.37, Simon Josefsson wrote:

>> cp = ToUnicode(ToASCII(cp, UseSTD3ASCIIRules), UseSTD3ASCIIRules)
>>
>> 002E;DISALLOWED;DISALLOWED;;;Y;FULL STOP
>
> Dot (U+002E) is not allowed by IDNA2003-ToASCII either, so I believe
> that line is incorrect.
>
> Did you run the multiple-label ToASCII algorithm or the single-label
> ToASCII algorithm?  The latter should not permit U+002E.

I called the libidn ToASCII and ToUnicode that exists. Now with the  
flag.

I guess you know the author :-)

> The multiple-label ToASCII algorithm is under-specified with regard to
> zero length labels in RFC 3490.  If you follow the strict algorithm as
> explained in RFC 3490, you end up with rejecting strings that end with
> '.', including the string that only contains '.'.

Fine, still, we know the rest of the list is correct then. I.e. we  
know the issues with ".".

    Patrik