Re: subproperty question

> Stefan,
> 
> In general one wouldn't expect a sub-property of a transitive property
> to be transitive itself, e.g., parent as a sub-property of ancestor.
> 
> Ian

Related to this: I think you can state that, for a property to be transitive,
all of its superproperties have to be transitive too.

From the RDF/S spec: "If some property P2 is a subPropertyOf another more
general property P1, and if a resource A has a P2 property with a value B,
this implies that the resource A also has a P1 property with value B."

Now consider P2 to be a transitive property and you have the following
situation:

	X  --P2-->  Y  --P2-->  Z

In that case, X would also be related to Z through P2 and thus, as P1 is a
superproperty of P2, also through P1. Therefore P1 also has to transitive.

Please correct me if I'm wrong,


Arjohn