get unique id(a)

Returns a worldwide unique ID like 7c89da48:1098e664883:-3834.11d1def534ea1be0:-7c89da48:1098e65f282:-7fde

Parameter a = true creates GUID format 8-4-4-4-12, e.g. 6624b931-0150-1a2f-2199-00a60bc90bc1

The GUID contains a timestamp 6624b931-0150-1a2f-2199-00a60bc90bc1

and a ring counter 6624b931-0150-1a2f-2199-00a60bc90bc1.

The first component references the creating system 6624b931-0150-1a2f-2199-00a60bc90bc1.