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Re: BlankNode in subject

From: Nathan <nathan@webr3.org>
Date: Sat, 25 Sep 2010 21:42:41 +0100
Message-ID: <4C9E5EC1.90301@webr3.org>
To: Toby Inkster <tai@g5n.co.uk>
CC: Andy Seaborne <andy.seaborne@epimorphics.com>, Semantic Web <semantic-web@w3.org>
Toby Inkster wrote:
> On Sat, 25 Sep 2010 18:39:41 +0100
> Nathan <nathan@webr3.org> wrote:
> 
>> reworded.. are the following equivalent:
>>
>>    [ :firstname "Ora" ] dc:wrote [ dc:title "Moby Dick" ] .
>>
>>    _:b1 owl:sameAs [ :firstname "Ora" ];
>>      dc:wrote [ dc:title "Moby Dick" ] .
>>
>> as in, can either be used to produce the same pseudo triples / graph
>> in NTriples.
> 
> They have the same meaning when interpreted through an OWL tool, but
> they produce different RDF triples. To begin with the first example
> contains three triples and the second one contains four. They will
> certainly produce different output as N3.
> 
> Here are various ways that the first example can be rewritten in Turtle
> which produce the same triples:
> 
> 	_:a :firstname "Ora" .
> 	_:a dc:wrote _:b .
> 	_:b dc:title "Moby Dick" .
> 
> 
> 	_:a :firstname "Ora" ;
> 		dc:wrote _:b .
> 	_:b dc:title "Moby Dick" .
> 	
> 
> 	_:a :firstname "Ora" ;
> 		dc:wrote [ dc:title "Moby Dick" ] .
> 
> 	
> 	[] :firstname "Ora" ;
> 		dc:wrote [ dc:title "Moby Dick" ] .
> 

thanks Toby, much appreciated!


Best,

Nathan
Received on Saturday, 25 September 2010 20:50:41 GMT

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