scope:

The IEC 61970-405 Generic Eventing and Subscription (GES) specification specifies a generalized interface for efficient exchange of messages. The specification takes into account the latencies caused by a Local Area Network (LAN) providing efficient data exchange also over Local Area Networks. The Generic Eventing and Subscription (GES) API is expected to provide one of the primary means for accomplishing application integration. Beyond the scope of the GES API, other APIs address the high performance, real-time interactive needs of an application within a running system as well as request/reply oriented generic data access. IEC 61970-405 is derived from the Object Management Group (OMG) Data Acquisition from Industrial Systems section Alarms and Events (DAIS A&E) specification. OMG DAIS A&E relies on the OMG Data Access Facility (DAF) and OPC Alarms and Events (A&E) specifications. OMG DAIS A&E is a Platform Specific Model (PSM) with CORBA as the platform and OPC A&E is a PSM with Microsoft COM as the platform. Implementers wanting an introduction to OMG DAIS A&E and OPC A&E shall read these documents.