SCE — Fundamental problem - cannot represent the properties/characteristics of an Element

ElementType seems to have no way to represent the properties of the type, and TypedElement seems to have no way to represent the values of any properties.
All you can represent is ElementRelationships.
8.1.3 says "entity-type “Thoroughbred Horse” that is used to specific the basic characteristics of thoroughbred horses." but there is nothing I can see that could represent those characteristics, nor their values for the Element Secretariat.