Expiry date (was: HTML+ addition)

Tim Berners-Lee <timbl@www3.cern.ch>
Date: Mon, 6 Sep 93 10:34:49 +0200
From: Tim Berners-Lee <timbl@www3.cern.ch>
Message-id: <9309060834.AA03944@www3.cern.ch>
To: Charles Henrich <henrich@crh.cl.msu.edu>
Subject: Expiry date (was: HTML+ addition)
Cc: www-talk@nxoc01.cern.ch
Reply-To: timbl@nxoc01.cern.ch
Status: RO

>From: Charles Henrich <henrich@crh.cl.msu.edu>
>Date: Sun, 5 Sep 1993 03:31:24 -0400 (EDT)
>How about adding a expiration tag for inlined images/figures?   
Something like
><img exp=never src="/mylogo.gif">

Usual objection:

This information is not appropriate to the link.
It is a property of the image.
It should be conveyed when the image is retrieved,
There is already the facility in HTTP/1.0,

Tim BL