Extensible select and enumeration types

and their elements in schema SPECIFICATION_DOCUMENT_MIM taking into account BASED_ON types


 document_reference_item - EXTENSIBLE SELECT
          configuration_item
          product
          product_definition
          product_definition_formation
          representation

 external_identification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          document_file
          external_source
          externally_defined_class
          externally_defined_general_property
          product_definition

 externally_versioned_item - EXTENSIBLE GENERIC_ENTITY SELECT
          externally_defined_general_property

 identification_item - EXTENSIBLE SELECT
          document_file

 name_item - EXTENSIBLE GENERIC_ENTITY SELECT
          external_class_library

 organization_item - EXTENSIBLE SELECT
          class

 person_and_organization_item - EXTENSIBLE SELECT

 versionable_item - EXTENSIBLE SELECT
          document_file