Extensible select and enumeration types

and their elements in schema Product_view_definition_properties_arm taking into account BASED_ON types


 measure_value - EXTENSIBLE SELECT
          any_number_value
          any_string_value
          length_measure
          plane_angle_measure

 property_assignment_select - EXTENSIBLE SELECT
          Product_view_definition
          View_definition_relationship

 represented_definition - EXTENSIBLE SELECT
          Assigned_property
          Independent_property