- From: Larry Masinter <masinter@parc.xerox.com>
- Date: Thu, 20 Jun 1996 11:38:04 PDT
- To: marc@ckm.ucsf.edu
- Cc: www-talk@w3.org
> Caching can't function to its potential if servers don't advertise L-M whenever > possible. Caching is essential to HTTP scalability in the near-term. Server > authors: N.B. above. Actually, caching can work without Last-Modified, as long as the origin server sends Expires and an ETag. Expires is actually what lets a cache do its work: give the cache permission to hold on to something. And the ETag lets the cache use If-None-Match instead of If-Modified-Since with date stamps, since dates are unreliable in some systems which might otherwise be able to use cache validators. Larry
Received on Thursday, 20 June 1996 15:27:59 UTC