Extensible select and enumeration types

and their elements in schema Specification_control_arm taking into account BASED_ON types


 breakdown_item - EXTENSIBLE SELECT
          Breakdown_element_definition
          Breakdown_element_usage

 configured_item_select - EXTENSIBLE GENERIC_ENTITY SELECT
          Alternative_solution

 date_or_date_time_item - EXTENSIBLE SELECT

 effectivity_item - EXTENSIBLE SELECT
          Configuration
          Replaced_usage_relationship

 extended_value_with_unit - EXTENSIBLE SELECT
          Value_limit
          Value_range
          Value_with_unit

 external_identification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          File

 groupable_item - EXTENSIBLE GENERIC_ENTITY SELECT

 identification_item - EXTENSIBLE SELECT
          Product_class
          Requirement
          Requirement_version

 instance_usage_context_select - EXTENSIBLE GENERIC_ENTITY SELECT
          Collected_item_association
          Solution_element

 measure_value - EXTENSIBLE SELECT
          any_number_value
          any_string_value
          length_measure
          plane_angle_measure

 organization_or_person_in_organization_item - EXTENSIBLE SELECT

 point_select - EXTENSIBLE GENERIC_ENTITY SELECT
          Cartesian_point
          Point_on_curve
          Point_on_surface

 product_item - EXTENSIBLE SELECT
          Product_view_definition
          View_definition_usage

 property_assignment_select - EXTENSIBLE SELECT
          Breakdown_element_realization
          Breakdown_element_usage

 represented_definition - EXTENSIBLE SELECT
          Assigned_property
          Independent_property

 template_definition_select - EXTENSIBLE SELECT
          Geometric_model