Usage:
1> [ uuid:generate() || I <- lists:seq(1,20) ].
[<<"78eb3eb1-78ac-46b0-94ca-2eecc14875ae">>,
<<"8c89cce5-d4d1-45f2-88e0-1afb3288062a">>,
<<"723adbf5-2702-4109-8d5e-0d604f9619ef">>,
<<"0b765ec0-cff1-4858-b929-a9931a64f920">>,
<<"f45b1682-9e6c-4755-b0e4-196039e7c0d2">>,
<<"06d06111-589d-4c6f-b8af-662b05e9a945">>,
<<"c305269a-8cac-4261-a389-3a8264cf6989">>,
<<"2f97c1da-74f7-4880-9a87-ea92765ea9d5">>,
<<"96f5c8a3-6274-4f01-ac10-ab755f58fc17">>,
<<"bbf9228c-5d1c-498a-9aa1-6fbd0a66b71b">>,
<<"e1da5aa8-0e75-4950-9976-853f551a1c02">>,
<<"bf729d61-f8be-447c-b8ca-0c0d22fdc9a6">>,
<<"c0e9cc97-4a50-4aab-92e1-97963530111b">>,
<<"78d925dd-1880-467a-bcea-3b333e00ec97">>,
<<"540e6e86-1453-4976-af5b-1026850ab18c">>,
<<"d2c45411-098e-402e-a47e-0bb85b44c909">>,
<<"a3e604e7-add0-405c-a9a2-6a683e1d8f72">>,
<<"d0859063-7c23-424b-809c-fa6b29785019">>,
<<"8af19410-c9e5-41d0-ac82-aaa8e6fd6b2f">>,
<<"8335ca05-5c63-4850-971e-357e843f2d79">>]
See also: http://en.wikipedia.org/wiki/UUID