Org will create these identifiers as needed. When this variable is non-nil,
the created UIDs will be stored in the ID property of the entry. Then the
next time this entry is exported, it will be exported with the same UID,
Org will create these identifiers as needed. When this variable is non-nil,
the created UIDs will be stored in the ID property of the entry. Then the
next time this entry is exported, it will be exported with the same UID,