A read-create enumeration, defaulting to candidate, controlling how an NSSA Area Border Router translates internal type-7 LSAs into type-5 LSAs for propagation into other areas: candidate lets OSPF elect a translator, always forces this router to always translate, never means this router never translates, and notApplicable applies when the area isn't NSSA-type. This setting only matters on ABRs of NSSA or NSSA-totally-stub areas, and it determines which router takes on the overhead of translating external routes learned within the NSSA for the rest of the OSPF domain to see. An admin who wants a specific, more capable ABR to always handle NSSA translation rather than leaving it to election would set this to always on that router's area configuration.