Property or characteristic that uniquely identifies the class of information stored about an entity. Primary keys are determinants or identifiers. Primary keys are never null; each entity or entity class has one and only one primary key. [DoD 8320.1-M-X]
Ngumhlaba oknaye luphawu olwulatha ngokukodwa ihlelo lolwazi olugciniweyo malunga nento ekhoyo. Okungundoqo kokuqala kuzizibonisi okanye izifumani. Kwaye okungundoqo akuzange kuphuthe; into ekhoyo nganye inento engundoqo yayo enye. [DoD 8320.1-M-X]