W3C home > Mailing lists > Public > public-lod@w3.org > March 2013

Re: Important Change to HTTP semantics re. hashless URIs

From: Young,Jeff (OR) <jyoung@oclc.org>
Date: Sun, 24 Mar 2013 14:28:11 -0400
Message-ID: <19A843C4-279C-4744-BCE9-A786559488D1@oclc.org>
To: "Kingsley Idehen" <kidehen@openlinksw.com>
Cc: <public-lod@w3.org>
Wouldn't the real world entity identifier get confused with the content-negotiable generic document identifier (genericResources-53)? The latter use case should also uses the Content-Location header.

Jeff

Sent from my iPad

On Mar 24, 2013, at 2:20 PM, "Kingsley Idehen" <kidehen@openlinksw.com> wrote:

> On 3/24/13 1:52 PM, 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
> 
> To be a little clearer, "real-world entity" isn't the focal point of the comment per se. This is about disambiguating description document and description document subject URIs. Thus, if the request URI and the Content-Location URI are both hashless and the status returned is 200 OK a client can also infer that the request URI denotes a Web Document (or entity of type: Web Document).
> 
> Re. #1 above, it just denotes an entity that isn't of the Web realm i.e., not of type: Web Document.
> 
> Hope that's clearer?
> 
> -- 
> 
> Regards,
> 
> Kingsley Idehen    
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Received on Sunday, 24 March 2013 18:29:43 UTC

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