On Wed, Mar 04, 2009 at 02:56:35PM +0100, Alexander Mayrhofer <[email protected]> wrote a message of 10 lines which said:
> I would keep the ABNF to purely *technical* limits as well. Don't let > the ABNF preclude any policy decisions. +1 But this criteria is easier written than applied. For instance, should the ABNF allow fully-numeric top-level domain names? There is no *technical* reason to ban them. With IPv4, RFC 1123 section 2.1 clearly says "The host SHOULD check the string syntactically for a dotted-decimal number before looking it up in the Domain Name System" so 1.2.3.112 is unambiguously the machine of IP address 1.2.3.112 even if the TLD ".112" is delegated. (With IPv6, it is even clearer since applications typically require some form of indication that it is an IP address, see RFC 3986 section 3.2.2). [In case you wonder, yes, I'm for allowing fully-numeric TLD, _in that I-D_, section 3 still being applicable.] _______________________________________________ DNSOP mailing list [email protected] https://www.ietf.org/mailman/listinfo/dnsop
