Clause 6.3 defines an Asset to be an Object either derived from FxAssetType or an Object of any type which implements the required Interfaces. Asset (plural Assets) is used throughout this document to designate an instance of such an Object, regardless of whether derived from the type or implementing the Interfaces.

Clause 6.4 defines a FunctionalEntity to be an Object either derived from FunctionalEntityType or an Object of any type which implements the required Interface. FunctionalEntity (plural FunctionalEntities) is used throughout this document to designate an instance of such an Object, regardless of whether derived from the type or implementing the Interfaces.