Re: Visualization of domain and range

>> 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.

Certainly true, although this approach mixes up ontology and instance  
level, which might also lead to confusion. (Remember, I'm talking  
about people who have never heard of those things ...)

> Something like this might be a nice visualisation:
>
> http://buzzword.org.uk/2009/domain-range-illustration.png

It would be even better to flip it so that the ontology level is on  
top of the instance level, so to be in line with MOF.

Best,
Bernhard