I was wondering whether there has been any discussion in the past
regarding the lifetime of a document, somewhat akin to the lifetime of
DNS records.
I thought that this kind of information might be useful to a proxy or
cache. Script generated documents could be given a lifetime of zero
(or in the case of stock price charts, for example, the time until the
next time the chart would be updated) while rather stable things (like
a Shakespeare play, could be given a rather long lifetime.)
Anyway, could anyone give me a pointer to the prior discussion (if
any)?
Thanks in advance.
--karl--