- From: Mark Baker <distobj@acm.org>
- Date: Fri, 25 Jul 2008 14:24:30 -0400
- To: "Williams, Stuart (HP Labs, Bristol)" <skw@hp.com>
- Cc: "David Orchard" <orchard@pacificspirit.com>, "Henry S. Thompson" <ht@inf.ed.ac.uk>, "www-tag@w3.org" <www-tag@w3.org>
On 7/25/08, Williams, Stuart (HP Labs, Bristol) <skw@hp.com> wrote: > > > David, Mark, > > I think that I understand "hypermedia as the enegine of application state" > as a concept, however both of you seem to indicate that there is some rule > here that stands to be broken. Could eiether of you state crisply what that > rule is? I've had a quick look in the oracle.. and have come up empty. Let's use an example. From http://www.cdlib.org/inside/diglib/ark/ ; In a web browser, for example, if you enter http://ark.cdlib.org/ark:/13030/tf5p30086k? it returns a brief machine- and eye-readable metadata record, such as [...] So if I've got an AWK-aware agent that is in the state "Looking at representation of http://ark.cdlib.org/ark:/13030/tf5p30086k", and that agent knows it need only append "?" to that URI and dereference it to take it to a new state in the application state machine where it can view a representation of a metadata record about that other resource, then that is a state transition that didn't use hypermedia. A hypermedia approach would have explicitly declared the "?" URI in the former representation with some link metadata called "metadata-record" or some such, e.g. <a rel="metadata" href="?" /> Make sense? Mark.
Received on Friday, 25 July 2008 18:26:16 UTC