Origin of Progress UUID (Universal Unique Identifier)

What is the origin of the Progress UUID?

UUID is a Universal Unique Identifier. RMI VMID is used to generate the Progress UUID.

The Progress UUID uses a java specific functionality where a class containing a method generates a globally unique id. 
This id is unique across time and space within a single computer network.
The UUID implementation is based from the RMI VMID class
The VMID class is part of the JAVA RMI package (java/rmi/dgc/VMID))
A VMID is an identifier that is unique across all java virtual machines under the following conditions: 

Progress Articles:

Does the GENERATE-UUID function return a universally unique identifier?   
How to create a correct UUID in broker definition in the ubroker.properties