- From: Booth, David (HP Software - Boston) <dbooth@hp.com>
- Date: Tue, 10 Apr 2007 12:09:38 -0400
- To: "Richard Cyganiak" <richard@cyganiak.de>, "Alan Ruttenberg" <alanruttenberg@gmail.com>
- Cc: "Tim Berners-Lee" <timbl@w3.org>, "Misha Wolf" <Misha.Wolf@reuters.com>, <www-tag@w3.org>, "Semantic Web" <semantic-web@w3.org>, <public-xg-mmsem@w3.org>, <newsml-g2@yahoogroups.com>, "Jonathan Rees" <jar@creativecommons.org>
> From: Richard Cyganiak > . . . > I'll try to summarize a bit. If you want to serve appropriate > content > to both humans and machines, you have these options (ignoring hash > URIs for the moment): > > 1. use content negotiation and 303-redirect from the domain object's > URI to HTML or RDF documents basend on the Accept header Actually I think there's another option also: to defer the content negotiation to the redirected URL. For example if we have the following four URIs: ud - URI for a domain object ur - general URI for information about ud urRDF - URI for RDF information about ud urHTML - URI for HTML information about ud Then attempting to dereference ud would result in: 1. ud does a 303-redirect to ur. 2. ur uses content negotiation to return either: - RDF (from urRDF); or - HTML (from urHTML). The architectural benefit of this is that it does the content negotiation where it logically makes sense: at the point when a representation will be served. This also allows the ur to be referenced separately, without going through ud. For example, some applications may only care about cataloging the information that is available, rather than the domain object. This approach also permits a 303-redirect service to be used, such as thing-described-by.org , so that: (a) someone minting a domain object URI does not need to configure their server for 303-redirects; and (b) the 303-redirection can be optimized away by syntactically recognizing the 303-redirect service's URI prefix if desired. David Booth, Ph.D. HP Software +1 617 629 8881 office | dbooth@hp.com http://www.hp.com/go/software
Received on Tuesday, 10 April 2007 16:10:48 UTC