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Re: How much should RDF represent data ?

From: Jan Algermissen <jalgermissen@topicmapping.com>
Date: Thu, 15 Jun 2006 21:30:39 +0200
Message-Id: <A7E3A215-12ED-4F9C-9D98-A6856DD8BA00@topicmapping.com>
Cc: semantic-web <semantic-web@w3.org>
To: Andrea Splendiani <andrea.splendiani@unimib.it>

Hi Andrea,

maybe it helps to look at RDF from the angle of data modeling.  
Essentially, RDF is as much a data model as is the relational model  
or XML infoset. They all provide a means to deal with data through a  
certain structural abstraction (that is where the three primarily  
differ) and provide operations on the data. Schema mechanisms allow  
you to define semantics that let you express information with the data.

RDF is a data model that is designed for use with Web architecture,  
allows merging of model instances (which XML and all relational  
models o not) and it provides a predefined single primary key  
mechanism (the URI) to name a few specifics.

On Jun 15, 2006, at 7:18 PM, Andrea Splendiani wrote:

>
> When RDF is used to represent OWL, there is also some easy  
> misunderstanding possible, since a piece of information represented  
> in a file is intuitevely closed-world. But this is may not really  
> be important....
>

No, this has nothing to do with files etc. See here: http:// 
esw.w3.org/topic/ClosedWorldAssumptions

HTH,

Jan

> best,
> Andrea
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Received on Thursday, 15 June 2006 19:30:54 UTC

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