Extensible select and enumeration types

and their elements in schema Classification_with_attributes_arm taking into account BASED_ON types


 assigned_name_select - EXTENSIBLE GENERIC_ENTITY SELECT
          External_class_library

 classification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          classified_element_select

 classified_element_select - EXTENSIBLE GENERIC_ENTITY SELECT
          Product
          Product_version
          Product_view_definition

 external_identification_item - EXTENSIBLE GENERIC_ENTITY SELECT

 identification_item - EXTENSIBLE SELECT

 measure_value - EXTENSIBLE SELECT
          any_number_value
          any_string_value
          length_measure
          plane_angle_measure

 organization_or_person_in_organization_item - EXTENSIBLE SELECT