Extensible select and enumeration types

and their elements in schema REQUIREMENT_ASSIGNMENT_XIM taking into account BASED_ON types


 approval_item - EXTENSIBLE GENERIC_ENTITY SELECT
          certification
          contract

 attribute_language_item - EXTENSIBLE GENERIC_ENTITY SELECT
          applied_organizational_project_assignment
          approval
          approval_relationship
          approval_status
          attribute_value_assignment
          certification
          certification_type
          contract
          date_role
          date_time_role
          identification_role
          multi_language_attribute_assignment
          organization_relationship
          organizational_project
          organizational_project_relationship
          organizational_project_role
          person_and_organization

 certification_item - EXTENSIBLE GENERIC_ENTITY SELECT

 characterized_product_definition - EXTENSIBLE SELECT
          product_definition
          product_definition_relationship

 contract_item - EXTENSIBLE GENERIC_ENTITY SELECT

 date_and_time_item - EXTENSIBLE SELECT
          applied_organization_assignment
          applied_person_and_organization_assignment
          applied_security_classification_assignment
          approval_person_organization
          certification
          contract
          event_occurrence
          organizational_project
          security_classification

 date_item - EXTENSIBLE SELECT
          applied_organization_assignment
          applied_person_and_organization_assignment
          applied_security_classification_assignment
          approval_person_organization
          certification
          contract
          event_occurrence
          organizational_project
          security_classification

 event_item - EXTENSIBLE GENERIC_ENTITY SELECT

 event_occurrence_item - EXTENSIBLE GENERIC_ENTITY SELECT
          organizational_project

 external_identification_item - EXTENSIBLE GENERIC_ENTITY SELECT

 identification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          approval_status
          contract
          organization
          product
          product_definition_formation
          requirement
          requirement_version
          requirement_view_definition
          security_classification
          security_classification_level

 multi_language_attribute_item - EXTENSIBLE GENERIC_ENTITY SELECT
          applied_organizational_project_assignment
          approval
          approval_relationship
          approval_status
          certification
          certification_type
          contract
          date_role
          date_time_role
          identification_role
          organization_relationship
          organizational_project
          organizational_project_relationship
          organizational_project_role
          person_and_organization

 organization_item - EXTENSIBLE SELECT
          applied_identification_assignment
          applied_security_classification_assignment
          contract

 person_and_organization_item - EXTENSIBLE SELECT
          applied_identification_assignment
          applied_security_classification_assignment
          contract

 project_item - EXTENSIBLE SELECT

 requirement_assigned_item - EXTENSIBLE GENERIC_ENTITY SELECT

 requirement_assignment_item - EXTENSIBLE SELECT

 requirement_satisfaction_item - EXTENSIBLE GENERIC_ENTITY SELECT
          requirement_assigned_item

 requirement_source_item - EXTENSIBLE GENERIC_ENTITY SELECT

 security_classification_item - EXTENSIBLE SELECT

 uri_item - EXTENSIBLE GENERIC_ENTITY SELECT