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).