A ClassificationScheme normally has numerous child concepts, which can also have child concepts.
In the Details area for the ClassificationScheme, click the ChildConcepts tab.
The ChildConcepts table appears.
A Details Panel window opens.
In the Name field, type a name for the concept.
(Optional) Type a description of the concept in the Description field.
In the Value field, type a value for the concept.
Click Add to save the new object and close the Details Panel window.
Click Apply in the Details area for the object.