W3C home > Mailing lists > Public > public-rdf-in-xhtml-tf@w3.org > June 2008

Re: geo location tutorial cut

From: Steven Pemberton <steven.pemberton@cwi.nl>
Date: Mon, 30 Jun 2008 16:17:44 +0200
To: "Shane McCarron" <shane@aptest.com>, "public-rdf-in-xhtml-tf.w3.org" <public-rdf-in-xhtml-tf@w3.org>
Message-ID: <op.udkfbutosmjzpq@acer3010>

On Fri, 27 Jun 2008 22:53:30 +0200, Shane McCarron <shane@aptest.com>  

> One question that has already been posed to me for which I do not have a  
> good answer:
> In the examples I point to the dbpedia entry for the Washington Monument  
> as the definitive *subject* I am describing.  There is also a Washington  
> Monument web page from the US Government.  Why is that not a more  
> appropriate subject?  I use a link to it in the examples so there is  
> something to "click" on.  And if that were the subject for everything,  
> is there a way to update the markup so that we wouldn't have to  
> duplicate the URI?

As Mark pointed out, this is a question I recently raised. In short, there  
is a major difference between a thing and a web page about that thing.

The dc:creator of me is my mother*, but the dc:creator of my web page is  
me. If you mixed me up with my web page, you would have to conclude that I  
was my own mother. It's as simple as that.

I went to a talk at XTech by someone creating a search engine for RDF, and  
he said it was a major headache for them, since their engine was  
constantly concluding things like "Tim Berners-Lee" and "W3C" were the  
same thing.

So the approach I am using in the tutorial I am writing is to say:

	<link about="_:WashingtonMonument" rel="foaf:primaryTopicOf"
               href="http://www.dbpedia.org/resource/Washington_Monument" />
	<p about="_:WashingtonMonument"
            property="geo:lat_long" content="38.8895563,-77.0352546">During  
our trip ...

and then it doesn't matter if you use the Wikipedia page as referent, or  
the .gov page, or even both.

My recent proposal to shortcut this is to define a new URI scheme:

	<p about="pto:http://www.dbpedia.org/resource/Washington_Monument"
            property="geo:lat_long" content="38.8895563,-77.0352546">During  
our trip ...

(where 'pto' means 'primary topic of').

* In passing, I recently met the daughter of an Italian artist who'd had  
her mother's signature tatooed on her neck.
Received on Monday, 30 June 2008 14:18:32 UTC

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