encoded Universally Unique Identifier encoded as a 128-bit integer.
Note: In
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SNOMED CT release files
UUIDs are represented as a string following the standard
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canonical form
. In this string form a UUID is represented by 32 hexadecimal digits, displayed in five groups separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters (32 digits and four hyphens).