UUIDgenerate generates a new Universally Unique Identifier. It
can be either time-based or random.
Usage
UUIDgenerate(use.time = NA)
Arguments
use.time
logical, if TRUE then time-based UUID is
generated, if FALSE then a random UUID is generated, if
NA then random one is generated if a sufficiently reliable
source of random numbers can be found, otehrwise a time-based UUID
is generated.