inheritance

Description: 

Inheritance of properties from superclasses to subclasses means that if an item x is an instance of a class A, then
1. all properties that must hold for the instances of any of the superclasses of A must also hold for item x, and
2. all optional properties that may hold for the instances of any of the superclasses of A may also hold for item x.

Source: 
CIDOC-CRM