Extensible select and enumeration types

and their elements in schema SHAPE_PROPERTY_ASSIGNMENT_XIM taking into account BASED_ON types


 external_identification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          document_file
          file

 identification_item - EXTENSIBLE SELECT
          document_file
          shape_representation

 versionable_item - EXTENSIBLE SELECT
          document_file
          shape_representation