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From: e07@nikhefh.nikhef.nl (Eric Wassenaar)
Newsgroups: comp.protocols.tcp-ip.domains
Subject: definition of sub-sub-domains
Message-ID: <1131@nikhefh.nikhef.nl>
Date: 26 Jan 91 17:11:40 GMT
Sender: e07@nikhef.nl (Eric Wassenaar)
Organization: Nikhef-H, Amsterdam (the Netherlands).
Lines: 21


Is it legal for a nameserver, authoritative for domain 'some.domain',
to define in its zone data file a sub-sub-domain (two levels deeper)
like
	foo.bar.some.domain	NS	somehost.some.domain

especially when 'bar.some.domain' is not defined, i.e. there exists
neither a SOA record, nor a NS record (nor any other record) for
'bar.some.domain' ?

I cannot find any information about this situation in the appropriate
RFCs. There exist many such cases in practice, and apparently it works,
but I am not sure if that is always guaranteed.
(Example: 'navo.navy.mil', 'nwc.navy.mil', etc., but no 'navy.mil')

Eric Wassenaar
-- 
Organization: NIKHEF-H, National Institute for Nuclear and High-Energy Physics
Address: Kruislaan 409, P.O. Box 41882, 1009 DB Amsterdam, the Netherlands
Phone: +31 20 592 0412, Home: +31 20 909449, Telefax: +31 20 592 5155
Internet: e07@nikhef.nl