Extensible select and enumeration types

and their elements in schema Behaviour_description_assignment_mim taking into account BASED_ON types


 characterized_product_definition - EXTENSIBLE SELECT
          product_definition
          product_definition_relationship

 groupable_item - EXTENSIBLE GENERIC_ENTITY SELECT
          product_definition

 identification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          product
          product_definition
          product_definition_formation