fully-qualified domain names containing differently-encoded labels ?
=JeffH
Jeff.Hodges at KingsMountain.com
Mon Oct 25 22:23:45 CEST 2010
AFAIK, this is a true statement:
a fully-qualified domain name (FQDN) is comprised of individual labels,
each of which can potentially be allocated via a different registrar,
and that some registrars/registries may or may not be supporting IDNs,
and if they are, they may support IDNA2003 or IDNA2008.
Yes?
Thus, it seems we may encounter domain names comprised of a mixture of label
types (beyond just the obvious two-level mixture of
"<IDNA-label>.<NR-LDH-TLD-label>" where TLD == "top level domain"), e.g...
<IDNA2008 A-label>.<IDNA2003 Punycode-encoded label>.TLD
..or possibly even..
<IDNA2003 Punycode-encoded label>.<NR-LDH>.<IDNA2008 A-label>.<U-label TLD>
..and obvious ad-infinitum variations thereof.
Though this (obviously common) case (that I have various in-the-wild samples of)..
<NR-LDH label>.<IDNA2003 Punycode-encoded label OR IDNA2008 A-label>.TLD
..eg..
www.xn--xample-9ua.org (registered by Paul Hoffman :)
..would seem to be arguably the most common case, at least for a while.
But in any case, it would seem that any specification of conversion operations
on a multi-label domain name, that takes into account IDNA{2003,2008}, needs to
properly allow for and accomodate label-by-label type diversity, yes?
thanks,
=JeffH
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