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
