Extensible select and enumeration types

and their elements in schema Requirement_decomposition_arm taking into account BASED_ON types


 activity_item - EXTENSIBLE GENERIC_ENTITY SELECT

 activity_method_item - EXTENSIBLE GENERIC_ENTITY SELECT
          Test_method_based_parameter_assignment

 analytical_model_port_assignment_select - EXTENSIBLE GENERIC_ENTITY SELECT
          Functional_unit_usage_view_terminal_definition

 assigned_name_select - EXTENSIBLE GENERIC_ENTITY SELECT
          External_class_library

 built_in_functions - EXTENSIBLE ENUMERATION
          attr_val

 classification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          classified_element_select
          Material_identification_with_conductivity_classification

 classified_element_select - EXTENSIBLE GENERIC_ENTITY SELECT
          Product
          Product_version
          Product_view_definition

 constants - EXTENSIBLE SELECT
          any_number_value
          any_string_value
          Logical_representation_item

 date_or_date_time_item - EXTENSIBLE SELECT

 documented_element_select - EXTENSIBLE SELECT
          Analytical_model_definition
          Model_parameter
          Predefined_requirement_view_definition
          Product
          Product_configuration
          Product_version
          Product_view_definition
          Property_value_representation
          Rule_set
          Signal_specification

 expression_syntax - EXTENSIBLE ENUMERATION
          express

 extended_value_with_unit - EXTENSIBLE SELECT
          Value_limit
          Value_range
          Value_with_unit

 external_identification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          Composite_signal_property_relationship
          Digital_analytical_model_vector_port
          Document_definition
          File
          Functional_specification
          Signal
          Signal_property
          User_defined_library_or_dictionary

 groupable_item - EXTENSIBLE GENERIC_ENTITY SELECT
          Group_relationship

 identification_item - EXTENSIBLE SELECT
          Product_class
          Requirement
          Requirement_version
          Requirement_view_definition
          Rule_set

 material_item_select - EXTENSIBLE GENERIC_ENTITY SELECT
          Part_view_definition
          Predefined_requirement_view_definition

 measure_value - EXTENSIBLE SELECT
          any_number_value
          any_string_value
          length_measure
          plane_angle_measure

 organization_or_person_in_organization_item - EXTENSIBLE SELECT
          Rule_action

 property_assignment_select - EXTENSIBLE SELECT
          Analytical_model_definition
          Requirement_view_definition

 represented_definition - EXTENSIBLE SELECT
          Assigned_property
          Independent_property

 requirement_assignment_item - EXTENSIBLE SELECT
          Functional_unit
          Group
          Group_relationship

 requirement_source_item - EXTENSIBLE SELECT