- 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
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 11:17:23 UTC