This work includes YANG models developed by the OpenConfig working group
and originally published under the Apache License Version 2.
A copy of the original license can be found in the file openconfig.LICENSE

More details at the http://www.openconfig.net/ web site.

OpenConfig models license is usually not mentioned in their YANG description
field. Exceptions include models derived from the IETF works and originally
published under the IETF license.