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• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.6.2 HistoricalDataNodes Address Space Model
  themselves. A simple example of a container for HistoricalDataNodes would be a "Folder Object". Figure 3 illustrates the basic AddressSpace Model of DataVariables that includes History. Figure ... shall have the Historizing Attribute (see OPC 10000-3 ) defined and can reference a HistoricalAccessConfiguration Object . In the case where the HistoricalDataNode is itself a Property then the HistoricalDataNode inherits