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Re: URI itself is a resource?

From: Phil Archer <phil@philarcher.org>
Date: Thu, 05 May 2011 20:21:27 +0100
Message-ID: <4DC2F8B7.6090508@philarcher.org>
To: Jitao Yang <jitao.yang@gmail.com>
CC: Pierre-Antoine Champin <swlists-040405@champin.net>, "semantic-web@w3.org" <semantic-web@w3.org>
Hi Jitao,

If you /really/ want to use a URI as a resource then the POWDER 
semantics may be useful to you [1]. We defined an extension that allows 
a literal value for 2 very specific predicates to be seen as sufficient 
for a URI to be a member of an OWL class. It needs to be handled with 
due care but, well, it works!

HTH

Phil

[1] http://www.w3.org/TR/powder-formal/#regexSemantics

On 05/05/2011 18:44, Jitao Yang wrote:
> Thank you! But I am a little bit confused that:
>
> On Thu, May 5, 2011 at 19:05, Pierre-Antoine Champin<
> swlists-040405@champin.net>  wrote:
>
>> On 05/02/2011 10:33 AM, Jitao Yang wrote:
>>> Dear all,
>>>
>>> In [1], "the term "resource" is used in a general sense for whatever
>>> might be identified by a URI". Then is URI itself a resource or not?>  If
>> a URI can be identified by another URI?
>>
>> Well, anything you can talk about and identify can be considered a
>> resource. URIs are no exception. However...
>>
>>> Such as: I have a webpage W-1,
>>> and I move to a new webpage W-2, whenever people click W-1, then it will
>>> redirect to W-2 automatically. Therefore, can we consider W-1 as an
>>> identifier of W-2?
>>
>> No... The fact that HTTP-GETting W-1 issues a 3xx Redirect to W-2 does
>> not by any mean allow you to infer that W-1 identifies the URI W-2 -- or
>> the resource identified by W-2, for that matter...
>>
>>
> from [1], the 303 response is "A URI", if we can not infer: "W-1 identifies
> the URI W-2", then W-1 identifies what? And could you please give me an
> example on one identifier identifies another identifier? Thank you!
>
> Best regards,
> Jitao
>
>
>> The only inferences that you can make from HTTP respones about what a
>> URI identifies are listed in [1].
>>
>>   pa
>>
>> [1]
>>
>> http://www.w3.org/2001/tag/doc/httpRange-14/2007-05-31/HttpRange-14#ref-deref-table
>>
>>>
>>> [1] http://tools.ietf.org/html/rfc3986
>>>
>>> Thanks,
>>> Jitao
>>
>>
>

-- 

Phil Archer                     | UK Project Manager
http://philarcher.org/          | i-sieve technologies
@philarcher1                    | http://i-sieve.com
Received on Thursday, 5 May 2011 19:22:08 UTC

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