"Deprecate"

I recently saw 'deprecate' used in an IANA Considerations and turned to
"IANA Considerations" [RFC5226] to see how it was defined only to find
no mention of it there.  I am used to the term from SMI, as quoted
below, but that seems not quite right, in that a deprecated IANA entry
never disappears, as in
http://www.iana.org/assignments/smi-numbers/smi-numbers.xhtml#smi-number
s-5

Are there other, perhaps better definitions of the term 'deprecated' in
use outside SMI (and yes, I know about praying nuns!)?

Tom Petch

----- Original Message -----
From: "Fred Baker (fred)" <fred@cisco.com>
To: "IPv6 Maintanence" <ipv6@ietf.org>
Sent: Monday, July 29, 2013 3:32 PM
Subject: "Deprecate"

> At the mike a moment ago, I referred to an existing formal definition
of "deprecate". For the record, the reference is to RFC 1158, which
reads:
>
> 3.1.  Deprecated Objects
>
>    In order to better prepare implementors for future changes in the
>    MIB, a new term "deprecated" may be used when describing an object.
>    A deprecated object in the MIB is one which must be supported, but
>    one which will most likely be removed from the next version of the
>    MIB (e.g., MIB-III).
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