Extensible select and enumeration types

and their elements in schema ACTIVITY_METHOD_IMPLEMENTATION_MIM taking into account BASED_ON types


 classification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          action_method_relationship
          group

 groupable_item - EXTENSIBLE GENERIC_ENTITY SELECT
          action_method_relationship

 identification_item - EXTENSIBLE SELECT
          action_method_relationship

 versionable_item - EXTENSIBLE SELECT