uuid 
The uuid package generates and inspects UUIDs based on RFC 4122 and DCE 1.1: Authentication and Security Services.
This package is based on the github.com/pborman/uuid package (previously named code.google.com/p/go-uuid). It differs from these earlier packages in that a UUID is a 16 byte array rather than a byte slice. One loss due to this change is the ability to represent an invalid UUID (vs a NIL UUID).
Install
go get github.com/google/uuid
Documentation
Full go doc style documentation for the package can be viewed online without
installing this package by using the GoDoc site here:
http://godoc.org/github.com/google/uuid