## globally unique identifier (GUID) The ID is in hexadecimal digits, meaning it uses the numbers 0 through 9 and letters A through F. The hexadecimal digits are grouped in a format that is 36 characters long -- 32 hexadecimal characters grouped as 8-4-4-4-12 and separated by four hyphens: `XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX`. ## # Universally Unique Lexicographically Sortable Identifier (ULID) ## Sources https://www.techtarget.com/searchwindowsserver/definition/GUID-global-unique-identifier https://github.com/ulid/spec