Core PropertyTypes
RDF:instanceOf
- Indicates a resource is a member of a class; the value must be be an instanceOf:Class
- A resource may be an instance of several classes
RDFS:subClassOf
- Indicates a (strict) subset/superset relationship
- Its domain and range is Class
- A class may not be a subclass of itself
- But there isn't a way to express/enforce this in RDFS