- From: Kingsley Idehen <kidehen@openlinksw.com>
- Date: Sun, 24 Mar 2013 14:29:07 -0400
- To: public-lod@w3.org
- Message-ID: <514F45F3.1020402@openlinksw.com>
On 3/24/13 2:05 PM, David Wood wrote: > On Mar 24, 2013, at 13:52, Richard Cyganiak <richard@cyganiak.de> 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. > Right, "the sender asserts that the payload is a representation of the resource identified by the Content-Location field-value". > > So, the sender (DBpedia) asserts that http://dbpedia.org/resource/Barack_Obama is a REPRESENTATION of the resource http://dbpedia.org/resource/Barack_Obama, but the recipient has no way to know that the resource http://dbpedia.org/resource/Barack_Obama is a real-world entity… I used real-world to make a point that's utterly lost. I could have simply said: entity not of the Web :-) The server responds with a 200 OK to <http://dbpedia.org/resource/Barack_Obama> while also providing <http://dbpedia.org/page/Barack_Obama> in the Content-Location header. Linked Data Inference: the server has provided a content location (document URL) for the URI in the request. Thus you have: 1. a URI or URL that denotes the document that describes the entity denoted by <http://dbpedia.org/resource/Barack_Obama> 2. a URI that denotes the entity of type: anything but a Web or Internet resource -- the rest of the definition is expressed and decipherable from the content of the description document. > > One really nice way to say that http://dbpedia.org/resource/Barack_Obama is real-world entity is for RDF returned by http://dbpedia.org/resource/Barack_Obama to say so :) As articulated in my response above. Kingsley > > Regards, > Dave > -- > http://about.me/david_wood > > > >> Best, >> Richard -- 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 18:29:29 UTC