Netscape's method uses their own ADD_DATE and LAST_VISIT attributes to help
keep track of when to update the cache. I'm not aware of which if any
browsers support it, but the only HTML-compatible element that is designed
to handle this is the META tag, which is what I'm assuming Mike is
referring to ("expires content tag"):
<META HTTP-EQUIV="Expires"
CONTENT="Tue, 04 Dec 1993 21:29:02 GMT">
which is straight from Tim and Dan's June 16th HTML 2.0 draft [1]. If
browser designers were to follow anything (and Lord knows, they don't
always), they would hopefully follow that. However, I don't believe the
date format is specified.
Murray
[1] http://www.w3.org/hypertext/WWW/MarkUp/html-spec/html-spec_5.html#SEC30
__________________________________________________________________
Murray M. Altheim, Information Systems Analyst
National Technology Transfer Center, Wheeling, West Virginia
email: murray.altheim@nttc.edu
www: http://ogopogo.nttc.edu/people/maltheim/maltheim.html