UUID is an acronym for the Universally Unique Identifier, a software architecture standard that is part of the Open Software Foundation's organization in the field of distributed computing environments. UUID is a 128-bit value, which can be calculated by a certain algorithm. To improve efficiency, the commonly used UUID can be shortened to 16 bits. The UUID is used to identify the attribute type and is considered a unique identifier in all space and time. In general, you can guarantee that this value is truly unique. Any UUID generated anywhere will not have the same value. One benefit of using a UUID is that a new identifier can be created for a new service. The standard UUID format is: xxxxxxxx-xxxx-xxxx-xxxxxx-xxxxxxxxxx(8-4-4-4-12).