Class: a class is a collection of individual or objects characterized by the same properties.--> E.g. “Person” is a class. Every “person” shares the same properties (basic ones like “has a name”, “was born” etc.); more specific properties can be added by activate new profiles.Property: a property is a connection between entities.--> E.g. The property “has its origins in” allows you to link a entity of the class “Person” to a “Geographical place”.Entity: an entity is a concrete example of a class; the specific data that you will add to your project will be entered in the form of “entities”. It is also often referred to as a concrete "instance" of a class.--> E.g. “Geneva” is an entity of the class “Geographical place”.