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• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.2.2 HistoricalDataConfigurationType
  HasProperty Variable MaxTimeInterval Duration PropertyType Optional HasProperty Variable MinTimeInterval Duration PropertyType Optional HasProperty Variable ExceptionDeviation Double PropertyType Optional HasProperty Variable ExceptionDeviationFormat ExceptionDeviationFormat PropertyType Optional HasProperty Variable StartOfArchive UtcTime PropertyType Optional ... data is collected based on a periodic sampling rate at the defined interval. The ExceptionDeviation Variable specifies the minimum amount that the data for the HistoricalDataNodes shall change in order