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Predicate uuid/2
Availability::- use_module(library(uuid)).(can be autoloaded)
Source[det]uuid(-UUID, +Options)
Create a new UUID according to Options. The following options are defined:
version(+Versions)
Integer in the range 1..5, which specifies the UUID version that is created. Default is 1.
dns(DNS)
url(URL)
oid(OID)
x500(X500)
Provide additional context information for UUIDs using version 3 or 5. If there is no explicit version option, UUID version 3 is used.
format(+Format)
Representation of the UUID. Default is atom, yielding atoms such as 8304efdd-bd6e-5b7c-a27f-83f3f05c64e0. The alternative is integer, returning a large integer that represents the 128 bits of the UUID.

If SWI-Prolog was not built with the OSSP UUID dependency library a simple Prolog alternative that only implements version 4 random UUIDs is provided. In this case the default version is 4 and the only admissible options are version(4) and format(Format).

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Jan Wielemaker said (2014-05-20T09:07:16):0 upvotes 0 0 downvotes
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SWI-Prolog's library(uuid) is based on the OSSP library. Please checkout their documentation for details. In a nutshell, the versions are:

  • Version 1 (time and node based) (default)
  • Version 3 (name based, MD5)
  • Version 4 (random data based)
  • Version 5 (name based, SHA-1)