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Re: [WARP] comment on subdomains

From: Thomas Roessler <tlr@w3.org>
Date: Fri, 11 Dec 2009 13:06:23 +0100
Cc: Thomas Roessler <tlr@w3.org>, public-webapps@w3.org
Message-Id: <4A91CE89-33F6-4BF4-8955-E17FAFC79D53@w3.org>
To: Dominique Hazael-Massieux <dom@w3.org>
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 donít 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 " ".

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

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