Thus, anyone can create a UUID and use it to identify something with near certainty that the identifier does not duplicate one that has already been, or will be, created to identify something else. While the probability that a UUID will be duplicated is not zero, it is generally considered close enough to zero to be negligible. Their uniqueness does not depend on a central registration authority or coordination between the parties generating them, unlike most other numbering schemes. When generated according to the standard methods, UUIDs are, for practical purposes, unique. The term globally unique identifier ( GUID) is also used. ![]() ![]() A universally unique identifier ( UUID) is a 128-bit label used for information in computer systems.
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