Identity

Eric Bohlman ebohlman at netcom.com
Thu Jun 24 20:30:50 BST 1999


On Thu, 24 Jun 1999, Richard Tobin wrote:

> > That *is* supposed to be a rule: that you can GET the same URL
> > as many times as you want with no changes.  Otherwise caching
> > would not work.
> 
> Surely the whole mechanism of HTTP "if-modified-since" and "expires"
> headers exists because this is not true?

"With no changes" means "with no changes occurring as a *result* of
GETting the URL.  i.e. given a sequence of N>=1 GETs G1,...,Gn to the same
URL with Gn taking place at time Tf, the result of Gn depends only on Tf
and *not* on N.



xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev at ic.ac.uk
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1
To (un)subscribe, mailto:majordomo at ic.ac.uk the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo at ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa at ic.ac.uk)





More information about the Xml-dev mailing list