Re: Another semantics question

Stasinos Konstantopoulos wrote:
> On Tue Apr 22 10:19:11 2008 Phil Archer said:
> 
>> What's the difference between these two
>>
>> <owl:Restriction>
>>   <owl:onProperty
>>     rdf:resource="http://www.w3.org/2007/05/powder#hasIRI"/>
>>   <owl:someValuesFrom rdf:nodeID="iriset_1"/>
>>   <rdfs:subClassOf rdf:nodeID="descriptorset_1"/>
>> </owl:Restriction>
> 
> this one means:
> all resources that have a hasIRI property that has a value from
> "iriset_1" are also in the "descriptorset_1" class.
> 
>> <owl:Class rdf:about="#resourceset_1">
>>   <rdfs:subClassOf rdf:ID="description_1"/>
>> </owl:Class>
> 
> all resources in "resourceset_1" are also in "description_1"
> 
>> and which should we use?
> 
> It's hard to tell in isolation, depends on where "resourceset_1" comes
> from. If it is defined as a restriction on a property, then these two
> might as well mean the same.

Good. I much prefer the second option - i.e. the one that doesn't 
mention hasIRI. The context is a GRDDLed DR so I think this is clear.


P