[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] URI resolver was Re: RDDL and XML Schemas Proposed Recommendation
Justin Couch wrote: > Jonathan Borden wrote: > > > This gets me thinking about RDDLs interactions with URI persistance > > policies - it would be good if in some way we can say: > > > > xxx URI is equivalent to yyy URI > > ... so when you ask for something with xxx nature, treat something with yyy > > nature as equivalent. > > This exists - the II URI resolver request. Is this URI equal/equivalent > to this other URI I've given you. Allows you to map URLs to URNs to > check equivalency. When you say 'exists': Is this something I can easily use and people can easily setup? For example can anyone with a web server easily administer this protocol, or is this something that will require deployment of an infrastructure? How would I do this? (As you can see I'm sort of a dummy about this stuff so I will need some very basic instructions about what to do if you have a chance.) > > Subsetting is an interesting problem, and one that does not really map > well to URI concepts. A URI identifies a resource. How do you subset an > identifier when you really don't know what that identifier means until > the point you resolve it to a real resource instance. A subset only has > meaning after you map it to a fixed thing. Things like RDF allow you to make statements "about" resources without needing to resolve the URI. The resource that a URI identifies is distinct from the "entity" that the URI may resolve to from time to time (the entity is not guarenteed to be constant e.g. a stock price --very unfortunately these days). -Jonathan
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