Re: Alternate source tags?

Michal Young (young@cs.purdue.edu)
Tue, 30 Apr 1996 10:33:33 -0600


Message-Id: <199604301519.KAA25629@discus.cs.purdue.edu>
Date: Tue, 30 Apr 1996 10:33:33 -0600
To: Jim Taylor <JHTaylor@videodiscovery.com>, www-html@w3.org
From: young@cs.purdue.edu (Michal Young)
Subject: Re: Alternate source tags?

>It would be useful if the spec allowed multiple alternate sources (look
>here, then here, then here...) and also allowed date-ranked sources so
>the browser would check all specified sources and then retrieve the
>most recent one. 

One would like to avoid hitting each remote page and checking dates to
determine whether to read the local (CD-ROM) copy or download the remote
version. Rather, one would like to hit a "directory" page once to download
a list of change dates. 

This looks an awful lot like cache management.  Whether the cache is in the
local hard disk or on a CD-rom doesn't seem to matter much.  That makes me
think that http, rather than html, is the place to address it.  Existing
tags like META should suffice for communicating the necessary information
to http servers and clients.

--Michal Young, Purdue