Extensible select and enumeration types

and their elements in schema APPEARANCE_ASSIGNMENT_MIM taking into account BASED_ON types


 characterized_product_definition - EXTENSIBLE SELECT
          product_definition
          product_definition_relationship

 identification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          representation
          shape_representation

 invisible_item - EXTENSIBLE GENERIC_ENTITY SELECT
          presentation_layer_assignment
          representation
          styled_item