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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: TR: RDDL (was RE: Negotiate Out The Noise )
 It has just occured to me that dedicating a catalog to a document type, and putting it at a default URL (certainly hosted by the document type author) is essentialy the same thing as associating a document with the URL of a document listing various meta-data resources (like RDDL v2 could be)... The terms change but they are just different words to describe the same system. BTW, if you could concatenate the RDDL xlink:role and xlink:arcrole, and still get a URI, it would be the URI that you would resolve in the catalog described in my previous mail. Of course you can't because a concatenation of two URI gives a URN, not a URI. I'm not sure I'm pretty clear here... I still need to think about it and try to get a precise description of the system. Regards, Nicolas ----- Original Message ----- From: "Nicolas Lehuen" <nicolas.lehuen@u...> To: "Michael Brennan" <mpbrennan@e...>; "John Cowan" <jcowan@r...> Cc: <xml-dev@l...> Sent: Saturday, January 19, 2002 12:09 AM Subject: Re: TR: RDDL (was RE: Negotiate Out The Noise ) > OK, so this could be the best world : a combination of local catalogs with > fallback remote catalogs, possibly with a HTTP cache in between ? > > Let's suppose for now that we'll use catalogs. Now, for any given document, > we have a PI that points to a default catalog and a DOCTYPE with a public > and a system ID. Now I want to get a schema in RELAX NG for the document so > that I can validate it, and, say, the Java Archive that contains an > implementation of java.lang.Applet (which after all is as a nice Java plugin > API for browsers) that can display the document ? > > Suppose the document is an X3D document linked from an XHTML file, then the > browser could validate it and automatically download a renderer Applet then > feed him with the document. Nice, isn't it ? > > My question is : should all those resources (schemas, plugins, etc.) be > resolved directly in the catalog (in which case we have to find a way to sum > up the purpose, nature etc. of resources in their URIs), or thanks to a > RDF/RDDL/whatever document which can handle more complex resolving semantics > than the catalog (in which case we have to define the URI of this document, > and of course the model of the document itself, back to the workbench) ? > Would the catalog resolving capabilities suffice, if associated to a clever > URI format that can encompass purpose and nature of resource ? > > Regards, > Nicolas > > ----- Original Message ----- > From: "Michael Brennan" <mpbrennan@e...> > To: "John Cowan" <jcowan@r...> > Cc: <xml-dev@l...> > Sent: Friday, January 18, 2002 11:21 PM > Subject: Re: TR: RDDL (was RE: Negotiate Out The Noise ) > > > > > > > > John Cowan wrote: > > > > > > Nicolas Lehuen wrote: > > > > > > > Are those catalog DNS like ? > > > > > > They could be, though there is currently nothing analogous to the DNS > > > root servers. Catalogs can be local or remote, and local catalogs > > > can delegate to remote ones, since catalogs are referred to by > > > URIs. > > > > And an XML instance can contain a PI that points to a default catalog > > that the application can fall back to resolve URIs. The referenced > > catalog is appended to the end of the chain of catalogs to search. > > > > ----------------------------------------------------------------- > > The xml-dev list is sponsored by XML.org <http://www.xml.org>, an > > initiative of OASIS <http://www.oasis-open.org> > > > > The list archives are at http://lists.xml.org/archives/xml-dev/ > > > > To subscribe or unsubscribe from this list use the subscription > > manager: <http://lists.xml.org/ob/adm.pl> > > > > > > > > ----------------------------------------------------------------- > The xml-dev list is sponsored by XML.org <http://www.xml.org>, an > initiative of OASIS <http://www.oasis-open.org> > > The list archives are at http://lists.xml.org/archives/xml-dev/ > > To subscribe or unsubscribe from this list use the subscription > manager: <http://lists.xml.org/ob/adm.pl> > > 
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