W3C home > Mailing lists > Public > semantic-web@w3.org > April 2008

Re: Person Identifier

From: Tim Berners-Lee <timbl@w3.org>
Date: Mon, 21 Apr 2008 21:43:59 +0800
Cc: al@jku.at, "Richard Cyganiak" <richard@cyganiak.de>, "Bent Rasmussen" <incredibleshrinkingsphere@gmail.com>, semantic-web@w3.org
Message-Id: <9C207B5B-CE28-47C4-ABB8-7E6A6730CB41@w3.org>
To: "Mark Birbeck" <mark.birbeck@x-port.net>

On 2008-04 -21, at 18:16, Mark Birbeck wrote:

> [...] So the
> argument being pursued (and I know it's not just your position, but
> one that is widely held) is that we need to establish a connection to
> the internet before we can deduce that some person is *not* a
> web-page.

Wrong.  You have it backward.  That is not a widely held position  
(Or find me examples?).
The TAG's argument (for example) is that *if* you have an HTTP  
identifier *and* you look it up
*then* you can deduce stuff from what you get back.

There are lots of ways of deducing something is not a web page,  
without looking it up.

	<http://example.net/foaf#me> a foaf:Person.

is one, given also commonly shared

   awww:WebPage owl:disjointWith foaf:Person.

can allow you to deduce that without doing any HTTP accesses,
so long as you have some reason to believe both triples.

> That is so back to front as to be frightening!

Well, that's because you took the architecture
"If  you do an HTTP access you know something"
and attacked it as
"If you do no HTTP access you know nothing".
which is a false argument. You had it back to front.

>> The fact, that I can figure out
>> anything about a thing by doing a simple GET request is very very  
>> appealing.
>> I think it makes things really easier.
> GET requests may be simple, but how can making one be easier than
> *not* making one?

That is always your choice.

> [...]
> Regards,
> Mark
> -- 
> Mark Birbeck
> mark.birbeck@x-port.net | +44 (0) 20 7689 9232
> http://www.x-port.net | http://internet-apps.blogspot.com
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Received on Monday, 21 April 2008 13:44:44 UTC

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