Re: Record of http discussions at the Paris WWW conference
Larry Masinter (masinter@parc.xerox.com)
Tue, 14 May 1996 19:34:26 PDT
> We worked out the following simplification:
> - adopt a model in which generic resources bind to other resources
> (called variant resources below), not to resource entities
> - thus, for a single resource, at most one response can be cached.
> A resource only has one expiration time associated with it. A
> generic resource is nothing but a `portal' through which variant
> resources are accessed.
I think that there is another view of how content negotiation and
caching might interact, where a single resource might have several
(fresh) entities associated with it in a cache, each corresponding to
different request headers as distinguished by vary parameters, and
where expiration times (freshness) is associated with entities and not
with resources.
I think these differing models of how caching of negotiated resources
might work are both self-consistent but not compatible and will
require different protocol.
Larry