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Re: Visualization of domain and range

From: Toby Inkster <tai@g5n.co.uk>
Date: Thu, 25 Jun 2009 12:16:36 +0100
To: Bernhard Schandl <bernhard.schandl@univie.ac.at>
Cc: public-lod@w3.org, public-semweb-ui@w3.org
Message-Id: <1245928596.10113.7.camel@ophelia2.g5n.co.uk>
On Thu, 2009-06-25 at 11:59 +0200, Bernhard Schandl wrote:

> However many "newbies" to RDF and ontologies are confused by this,  
> because the triple
> 
> foaf:Agent foaf:holdsAccount foaf:OnlineAccount .
> 
> is actually not contained in the ontology.

What needs to be communicated is that:

[ a foaf:Agent ] ´╗┐foaf:holdsAccount [ a foaf:OnlineAccount ] .

instead. Those triples are not actually in the ontology itself, but will
be found (or at least implied) in any instance data that makes use of
the foaf:holdsAccount property.

> [1] <http://www.ifs.univie.ac.at/schandl/2009/06/domain+range_bad.png>
> [2] <http://www.ifs.univie.ac.at/schandl/2009/06/domain 
> +range_better.png>

Something like this might be a nice visualisation:

http://buzzword.org.uk/2009/domain-range-illustration.png

At least, it works for small examples like this, but would probably
become messy if you wanted to illustrate a more complex set of
relationships.

-- 
Toby A Inkster
<mailto:mail@tobyinkster.co.uk>
<http://tobyinkster.co.uk>
Received on Thursday, 25 June 2009 11:17:22 GMT

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