Q3: What characters should be allowed in a revised IDNA2008 specification?
Vint Cerf
vint at google.com
Tue Mar 31 18:14:24 CEST 2009
IDNA2008 currently allows a more restricted set of characters to be
used in domain name labels than IDNA2003 does.
Does the working group agree that the more restricted set of the
current IDNA2008 Tables document should apply once IDNA2008 is
adopted? What should be done about registrations that use characters
that would not be allowed under IDNA2008? Should there be a
transitional period of finite duration after which these registrations
will become invalid? Should they be grandfathered somehow? If we
believe all future registrations should be restricted, how would such
grandfathered registrations be found if the IDNA2008 rules would
reject lookups of the disallowed characters?
A two-lookup scheme might solve this problem:
1. lookup according to IDNA2008 rules (if disallowed characters are
present, go to step 2); if domain name record is found, return the
information. If not, go to step 2
2. lookup according to IDNA2003 rules (permitting a broader range of
characters in the lookup process). If domain record is found, return
it, if not return "no such domain name"
Vint Cerf
Google
1818 Library Street, Suite 400
Reston, VA 20190
202-370-5637
vint at google.com
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