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• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.3 ConditionVariable
  ConditionVariable Various information elements of a Condition are not considered to be states. However, a change in their value is considered important and supposed to trigger an Event Notification . These ... information elements are called ConditionVariable . ConditionVariables are represented by a ConditionVariableType, formally defined in Table 2 . Table 2 - ConditionVariableType definition Attribute Value BrowseName ConditionVariableType DataType BaseDataType ValueRank