This standard defines an Information Modelfor Conditions, DialogConditions, and Alarmsincluding acknowledgement capabilities. It is built upon and extends base Event handling which is defined in OPC 10000-3, OPC 10000-4and OPC 10000-5. This Information Modelcan also be extended to support the additional needs of specific domains. The details of what aspects of the Information Model are supported are defined via Profiles (see OPC 10000-7for Profile definitions). Some systems may expose historical Events and Conditions via the standard Historical Access framework (see OPC 10000-11for Historical Event definitions).