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

From: Wolfgang Orthuber <orthuber@kfo-zmk.uni-kiel.de>
Date: Tue, 26 May 2009 14:17:29 +0100
Message-ID: <001601c9de04$51e5f430$a3b35ec2@workstation>
To: "Dan Brickley" <danbri@danbri.org>
Cc: "semantic-web" <semantic-web@w3.org>, "Linked Data community" <public-lod@w3.org>

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?


----- Original Message ----- 
From: "Dan Brickley" <danbri@danbri.org>
To: "Wolfgang Orthuber" <orthuber@kfo-zmk.uni-kiel.de>
Cc: "David Booth" <david@dbooth.org>; "semantic-web" <semantic-web@w3.org>; "Linked Data community" 
Sent: Tuesday, May 26, 2009 12:51 PM
Subject: Re: numeric web search (Was: URLs instead of URNs)

> On 26/5/09 14:45, Wolfgang Orthuber wrote:
> [...]
>> Though different HTTP URIs always refer to different addresses
> Where do you get this from?
> Do you mean "though different HTTP URIs are different URIs"?
> http://example.com:80/foo
> and
> http://EXAMple.COM/foo
> ...both address (or fail to address) the same thing.
> If you want to consider these different "addresses" (for potentially the same thing), you're welcome. But 
> the rules of HTTP URIs mean that there's nothing named (addressed) by the one but not by the other. Domain 
> names are case insensitive, and HTTP URIs default to port 80.
> There are other situations where we might say a pair of HTTP URIs happen accidentally (perhaps for a while, 
> perhaps forever) to be for the same underlying thing. But the example above is one in which they simply are 
> different ways of writing the same thing.
> cheers,
> Dan
Received on Tuesday, 26 May 2009 12:14:12 UTC

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