Extensible select and enumeration types

and their elements in schema Layered_2d_shape_arm taking into account BASED_ON types


 closed_curve - EXTENSIBLE GENERIC_ENTITY SELECT
          Circle
          Closed_composite_curve

 external_identification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          File

 identification_item - EXTENSIBLE SELECT

 measure_value - EXTENSIBLE SELECT
          any_number_value
          any_string_value
          length_measure
          plane_angle_measure

 part_template_or_physical_unit_2d_shape_select - EXTENSIBLE GENERIC_ENTITY SELECT

 point_select - EXTENSIBLE GENERIC_ENTITY SELECT
          Cartesian_point
          Point_on_curve
          Point_on_surface

 property_assignment_select - EXTENSIBLE SELECT
          Characterizable_object
          Shape_element

 represented_definition - EXTENSIBLE SELECT
          Assigned_property
          Independent_property

 template_definition_select - EXTENSIBLE SELECT
          Geometric_model