Reference Data Store
Reference Data Stores allows a Data Store to use the Schema of another Data Store.
It can be used to allow Inheritance with the Schema Only (No Data) Data Store Type, or with any other Data Store as part of a Schema Validation.
Schema Only Inheritance
When using a Schema Only Data Store the classes and attributes can have their inheritance set within the Schema.

After the classes and attributes have been created, inheritance can be defined between them. Right clicking a class and selecting Edit Base Class allows you to set the class your selection should inherit from.

Confirm the choice to update the Schema with the inherited class name next to the class that is inheriting the attributes.