[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: Meta-somethingorother (was the semantic webmega-permathrea
Hi Joshua, > It's even worse than this. I don't think anyone *ever* uses RDF to "add > meta-data to some existing data (also called a resource)". It just > can't work this way. The data and the resource are separate, and you > *always* talk about the resource in RDF, and *not* about the data. > > They really are completely separate. I didn't meant "adding" in the sense of including the RDF statements into the data but since you are it, yes they (the rdf statements) "may" be included into the data, for example, included into an XHTML document. There is nothing that ever said in the specs that RDF statements should be in a separate document. > Note that you might even want to use different representation predicates > for different user agents, and so on. Obviously in practice nobody > shares resource representations this way, since we have HTTP and it > works fine. But the point is that *architecturally* and *conceptually*, > the result of HTTP GET is just as much "about" the resource as any other > RDF statement. > I agree. I experiment this every day by producing different data representations from the very same domain model (i.e. data set), in that case, different data textual serialization. If I interact with an RDF server through an HTTP GET I may also get a representation on some unknown internal representation (a Grove? an LDAP directory? a relational DB? a gizmo?). By the way speaking of representation I recently found that XML is a great vehicle to serialize objects (class based or prototype based), even better its inherent REST architecture allows us to support subject oriented programming by showing different representations or subjective views on an object collection. Even better, the transformation characteristics of XML allows me to practice MDA by transforming a subjective view on a model (but still a domain model) into an interactive model (a web apps running entirely on the client). Thanks you REST and XML framework, I wasn't able to that as easily with older technologies. Cheers Didier PH Martin
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