- From: Kingsley Idehen <kidehen@openlinksw.com>
- Date: Sun, 24 Mar 2013 14:42:37 -0400
- To: public-lod@w3.org
- Message-ID: <514F491D.2000806@openlinksw.com>
On 3/24/13 2:26 PM, Barry Norton wrote: > On 24/03/13 18:23, Kingsley Idehen wrote: >> On 3/24/13 1:59 PM, Barry Norton wrote: >>> On 24/03/13 17:52, Richard Cyganiak wrote: >>>> On 24 Mar 2013, at 17:39, Kingsley Idehen <kidehen@openlinksw.com> >>>> wrote: >>>>> Thus, if a client de-references the URI >>>>> <http://dbpedia.org/resource/Barack_Obama> and it gets a 200 OK >>>>> from the server combined with >>>>> <http://dbpedia.org/page/Barack_Obama> in the Content-Location >>>>> response header, the client (user agent) can infer the following: >>>>> >>>>> 1. <http://dbpedia.org/resource/Barack_Obama> denotes the >>>>> real-world entity 'Barack Obama' . >>>> Why can a client make this inference? I can't see any basis for the >>>> inference that the URI identifies a “real-world entity”. The >>>> described interaction does not provide any information regarding >>>> the nature of the identified resource, AFAICT. >>>> >>>> Best, >>>> Richard >>> >>> Agreed. And I don't like the 'give a 200 and trust clients to spot >>> the header' approach. I especially don't like that the header will >>> become a 'we can add that later' academic ideal and we'll >>> effectively lose the NIR/IR distinction altogether (if we already >>> haven't). >>> >>> Barry >>> >>> >>> >> That's simply isn't the point. >> >> This is about incorporating more metadata into the Linked Data URI >> disambiguation process i.e., interpret what the Content-Location >> value delivers. The response header implies that the server is >> pointing you to the location of a document associated with the >> request URI. >> >> From a Linked Data perspective, it simply means that we have another >> heuristic for disambiguation. >> >> The goal is to have options, especially an option that kills the 303 >> distraction with regards to hashless URIs. >> >> An optional heuristic is just that, an option. >> >> Aren't you fed up of 303 distractions re. Linked Data and hashless URIs? >> > > > I am. But half of the discussion is caused by having two different > 'options'. A third doesn't solve that. > > Barry > > > We need more options to solve this kind of politically-elastic problem. Here's the current list of options I am aware of: 1. use hash URIs -- here you have implicit indirection enabling implicit disambiguation. 2. use hashless URIs and 303 redirection - here you have explicit indirection via 303 redirection enabling disambiguation. 3. use hashless URIs, 200 OK, and Content-Location header -- here the indirection is aided by simply drawing inference from the existence of two URIs in the response metadata i.e., content-location URI and the request URI. 4. use .well-known/host-meta -- here the RDF document returned enables an agent disambiguate entity and description document URIs. 5. a variant of #3 whereby the client uses the RDF document returned to enable disambiguation of entity and description document URIs. Bottom line, there isn't a golden solution, but from an architectural perspective it's always a win to be "horse for courses" [1] compliant :-) We always get into trouble when we try to mandate a golden option. It never works. The Web works because when all is said an done it is "horses for courses" compliant. Links: 1. http://en.wiktionary.org/wiki/horses_for_courses . -- Regards, Kingsley Idehen Founder & CEO OpenLink Software Company Web: http://www.openlinksw.com Personal Weblog: http://www.openlinksw.com/blog/~kidehen Twitter/Identi.ca handle: @kidehen Google+ Profile: https://plus.google.com/112399767740508618350/about LinkedIn Profile: http://www.linkedin.com/in/kidehen
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Received on Sunday, 24 March 2013 18:43:00 UTC