Extensible select and enumeration types

and their elements in schema ITEM_DEFINITION_STRUCTURE_MIM taking into account BASED_ON types


 characterized_product_definition - EXTENSIBLE SELECT
          product_definition
          product_definition_relationship

 date_and_time_item - EXTENSIBLE SELECT
          event_occurrence

 date_item - EXTENSIBLE SELECT
          event_occurrence

 document_reference_item - EXTENSIBLE SELECT
          product
          product_definition
          product_definition_formation

 effectivity_item - EXTENSIBLE SELECT
          product_definition_relationship

 external_identification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          document_file
          product_definition

 groupable_item - EXTENSIBLE GENERIC_ENTITY SELECT
          package_product_concept_feature
          product_concept_feature

 identification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          document_file
          product_class
          product_concept_feature
          product_identification
          shape_representation

 item_identified_representation_usage_definition - EXTENSIBLE GENERIC_ENTITY SELECT
          represented_definition

 organization_item - EXTENSIBLE SELECT
          product
          product_definition
          product_definition_formation

 person_and_organization_item - EXTENSIBLE SELECT
          product
          product_definition
          product_definition_formation

 shape_model - EXTENSIBLE GENERIC_ENTITY SELECT
          shape_representation