- From: Roy T. Fielding <fielding@apache.org>
- Date: Wed, 12 Nov 2003 12:42:55 -0800
- To: "Larry Masinter" <LMM@acm.org>
- Cc: <uri@w3.org>, "Michel Suignard" <michelsu@microsoft.com>
> Can we assume that TLDs will be non-numeric?
Yes, but we can't assume that the last domain is a TLD.
> It looks to me that the BNF is ambiguous between
> hostname and IPv4 addresses because the
> BNF for hostname doesn't rule out
> nnn.nnn.nnn.nnn
Yes, it says that in the text describing the rule:
The production for host is ambiguous because it does not completely
distinguish between an IPv4address and a hostname. Again, the
"first-match-wins" algorithm applies: If host matches the production
for IPv4address, then it should be considered an IPv4 address literal
and not a hostname.
All of our attempts to disambiguate within the grammar itself did
not work because, without a trailing ".", there is no way to know
which is the TLD.
....Roy
Received on Wednesday, 12 November 2003 16:08:51 UTC