You can use the ADD, CREATE, DELETE, REMOVE, SET and SHOW
 directives with the Subordinate Reference entity.

 The CREATE and DELETE directives are used to create and delete a
 Subordinate Reference entity.

 The SET and SHOW directives are used to set or show Subordinate
 Reference characteristic attributes, respectively.

 The ADD and REMOVE directives are used to add or remove
 values to or from a characteristic attribute.