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

Dan,

can a http URI refer transiently or accidentally to some address?
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?

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
>
>