I assume this HTML page is being delivered via HTTP. Hence
this is really a question about the behaviour of HTTP clients
and servers. Have you checked the HTTP spec? How about your
server documentation?
7.1 Entity Header Fields
Sun Mar 12 18:36:52 1995
http://www.w3.org/hypertext/WWW/Protocols/HTTP1.0/HTTP1.0-ID_30.html
|7.1.8 Expires
|
|The Expires field gives the date/time after which the entity should be
|considered stale. This allows information providers to suggest the
|volatility of the resource. Caching clients (including proxies) must
|not cache this copy of the resource beyond the date given, unless its
|status has been updated by a later check of the origin server.
See also:
http://www.w3.org/hypertext/WWW/MarkUp/html-spec/html-spec_5.html#SEC30
Hypertext Markup Language - 2.0 - Document Structure
Fri Jun 16 19:56:22 1995
|Examples
|
|If the document contains:
|
|<META HTTP-EQUIV="Expires"
| CONTENT="Tue, 04 Dec 1993 21:29:02 GMT">
|<meta http-equiv="Keywords" CONTENT="Fred">
|<META HTTP-EQUIV="Reply-to"
| content="fielding@ics.uci.edu (Roy Fielding)">
|<Meta Http-equiv="Keywords" CONTENT="Barney">
|
|then the server may include the following header fields:
|
|Expires: Tue, 04 Dec 1993 21:29:02 GMT
|Keywords: Fred, Barney
|Reply-to: fielding@ics.uci.edu (Roy Fielding)
Dan