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Re: numeric web search (Was: URLs instead of URNs)

From: Kingsley Idehen <kidehen@openlinksw.com>
Date: Tue, 26 May 2009 10:04:59 -0400
Message-ID: <4A1BF70B.6050103@openlinksw.com>
To: Wolfgang Orthuber <orthuber@kfo-zmk.uni-kiel.de>
CC: Dan Brickley <danbri@danbri.org>, semantic-web <semantic-web@w3.org>, Linked Data community <public-lod@w3.org>
Wolfgang Orthuber wrote:
> Dan,
> can a http URI refer transiently or accidentally to some address?
Of course.
> Which term do you suggest for something which permanently refers to a 
> (unique, permanent) web address, and which differs if and only if the 
> web address differs?
A URI that carries location/address specificity or dependency 
(transiently or accidentally).

An Identifier with endowed location specificity (overtly or covertly) 
isn't optimal, but that doesn't stop it being an identifier.

A URL is a Web Address based Identifier -- a URI :-)

> Wolfgang
> ----- Original Message ----- From: "Dan Brickley" <danbri@danbri.org>
> To: "Wolfgang Orthuber" <orthuber@kfo-zmk.uni-kiel.de>
> Cc: "semantic-web" <semantic-web@w3.org>; "Linked Data community" 
> <public-lod@w3.org>
> Sent: Tuesday, May 26, 2009 1:31 PM
> Subject: Re: numeric web search (Was: URLs instead of URNs)
>> On 26/5/09 15:17, Wolfgang Orthuber wrote:
>>> Dan,
>>> in http://www.w3.org/TR/uri-clarification/ I read "An http URI is a 
>>> URL"
>>> . So I concluded that a different http URI is a different URL 
>>> (address).
>>> At this I assumed, that all http URIs which refer to the same address
>>> (case insensitive), are defined as "identical". Is this correct?
>> I'd rather they'd have said "URL" is a technically obsolete but 
>> common colloquial term for http and http-like URIs. Identity of 
>> identifiers is tricky because you have to try to distinguish between 
>> identifiers which accidentally of transiently refer to the same 
>> thing, versus those where it is built-in to the definition of the 
>> scheme (eg. the port 80 and domain name canonicalisation rules).
>> Dan



Kingsley Idehen	      Weblog: http://www.openlinksw.com/blog/~kidehen
President & CEO 
OpenLink Software     Web: http://www.openlinksw.com
Received on Tuesday, 26 May 2009 14:05:46 UTC

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