OpenFMB, Open Field Message Bus: The Open Field Message Bus (OpenFMB) interoperability framework is a standard ratified in 2016 by North American Energy Standards Board (NAESB)?, a leading energy industry Standards Development Organization (SDO) accredited by the American National Standards Institute (ANSI). The OpenFMB Users Group was created in 2018 after a transition to the Utility Communications Architecture International Users Group (UCAIug) from a Priority Actio?n Plan previously organized by the Smart Grid interoperability Panel (SGIP), which is now part of the Smart Electric Power Alliance (SEPA).?