Re: [WARP] comment on subdomains

On 10 Dec 2009, at 16:51, Dominique Hazael-Massieux wrote:

> A quick comment after re-reading WARP at the invitation of Robin to DAP
> [1]: I don’t think the notion of subdomain is well-defined; is w3.org a
> subdomain of .org? is co a subdomain of co.uk?

The former is, the latter isn't.  The relevant definition is in section 3.1 of RFC 1034:

> A domain is identified by a domain name, and consists of that part of
> the domain name space that is at or below the domain name which
> specifies the domain.  A domain is a subdomain of another domain if it
> is contained within that domain.  This relationship can be tested by
> seeing if the subdomain's name ends with the containing domain's name.
> For example, A.B.C.D is a subdomain of B.C.D, C.D, D, and " ".

http://www.ietf.org/rfc/rfc1034.txt

Received on Friday, 11 December 2009 12:06:26 UTC