Re: [idn] length restrictions on IDN label

[Dave Crocker <dhc2@dcrocker.net>]

Erik,

Monday, October 14, 2002, 7:29:11 AM, you wrote:

EN> It might also be useful to make the IDNA specification more clear about
EN> the length limit and its implications somewhere in the document.
EN> Strawman:         The length limit for internationalized labels is the
EN> limit         of at most 63 octets of output from ToASCII. The design
EN> of the Punycode encoding is such that some sequences of up to 63 Unicode
EN> code points result in ToASCII output of 63 or less octets, but
EN> all possible Unicode strings of 64 code points result in ToASCII
EN> output of 64 or more octets.


If this limit is a new and independent from the underlying "native" DNS,
what is the reason for it?  If it is not independent, why duplicate it?

d/