host vs hostname (Was: CID: and MID: URL schemes) from Ed Levinson on 1995-11-02 (uri@w3.org from November 1995)

From: Ed Levinson <elevinso@Accurate.COM>
Date: Thu, 02 Nov 1995 11:19:22 -0500
To: uri@bunyip.com, ietf-822@list.cren.net
Message-Id: <9511021619.AA03957@Accurate.COM>

In examining the syntax of id-spec in draft-levinson-cid-01 I
considered substituting host for the existing hostname.  I.e.,
changing the present syntax from
	id-spec  := local-part "@" hostname
to
	id-spec' := local-part "@" host
where (from rfc 1738)
	host     := hostname | hostnumbmer
and
	hostnumber := digits "." digits "." digits "." digits

However, converting id-spec' into a message-ID (content-ID) becomes
problematical.  Rfc 822 requires, I think, that a message-ID containing
a host's IP address (hostnumber) have the form "[" digits "." digits "."
digits "." digits"]"

Is this reading of rfc822 correct or should id-spec be
local-part@host.

Thanks.../Ed

Received on Thursday, 2 November 1995 11:59:51 UTC