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OPC-10000-13 – OPC Unified Architecture - Part 13: Aggregates

3.1.8 interpolated bounding values

after value does not exist the before value shall be extrapolated using SlopedExtrapolation or SteppedExtrapolation . The period of time that is searched to discover the Good values before and after ... range which is at least the size of the ProcessingInterval. Interpolated Bounding Values using SlopedExtrapolation are calculated as follows: find the first non-Bad Raw value before timestamp; find