Re: [idn] Case-insensitiveness of prefix

[David Hopwood <david.hopwood@zetnet.co.uk>]

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YangWoo Ko wrote:
> According to Section 5. of last IDNA document (draft-ietf-idn-idna-04.txt),
> "It(=prefix) MUST be recognized in a case-insensitive manner."
> 
> I could not understand implications of that statement. Does it mean that
> IDNA prohibit the use of case information of prefix for any purpose ?

It means that labels where the prefix characters differ in case are
equivalent. (That should be true for any proposal that uses ACE, not
just IDNA.)

> For example, case information of prefix may be utilized as a parity check
> for any purpose.

No, it couldn't reliably be used as a parity check, because the case of
an ACE label may be changed.

- -- 
David Hopwood <david.hopwood@zetnet.co.uk>

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