There are two editions of Vyatta. One edition is for the Vyatta Community. The second is the Subscription Edition, often simply referred to as Vyatta. The differences between the two editions are as follows:
Vyatta Community Edition
Vyatta Subscription Edition
Most of the time, Vyatta operates on a two month rapid development cycle. This usually consists of a month of development and a month of QA. The end of code development is referred to as the Code Complete milestone. The end of the QA cycle marks the QA complete milestone. Typically, each milestone in the development cycle results in new packages being posted to the Vyatta repositories where users can update. New community ISO images are built at roughly six month intervals.
Vyatta is an integration of a number of components from a variety of different sources, much the same way as a standard Linux distribution. Many of the components are licensed under the GNU GPL. Others carry a BSD license. All components carry licenses defined as open source.
License files are included with every package installed in the system and can be viewed in the /usr/share/doc/package/copyright file.