Extensible select and enumeration types

and their elements in schema DESIGN_MANAGEMENT_MIM taking into account BASED_ON types


 action_items - EXTENSIBLE GENERIC_ENTITY SELECT

 action_request_item - EXTENSIBLE GENERIC_ENTITY SELECT

 approval_item - EXTENSIBLE GENERIC_ENTITY SELECT
          frozen_assignment

 date_and_time_item - EXTENSIBLE SELECT
          approval_person_organization

 date_item - EXTENSIBLE SELECT
          approval_person_organization

 managed_design_object - EXTENSIBLE GENERIC_ENTITY SELECT
          product_definition