Difference between revisions of "uaCap:HistoricalData Aggregates"

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{{CapabilityUri|/HistoricalData/Aggregation}}
 
{{CapabilityUri|/HistoricalData/Aggregation}}
 
'''Description'''
 
'''Description'''
<br>Provides derived values from raw data over a defined time range. There are several defined aggregates as well as the ability for vendors to provide custom aggregates.
+
<br>Aggregates are used to derive values from raw data over a defined time range. There are several defined aggregates as well as the ability for vendors to provide custom aggregates.
  
 
'''Usage Considerations'''
 
'''Usage Considerations'''

Latest revision as of 08:36, 16 February 2015

URN:          https://opcfoundation.org/wiki/index.php/HistoricalData/Aggregation

Description
Aggregates are used to derive values from raw data over a defined time range. There are several defined aggregates as well as the ability for vendors to provide custom aggregates.

Usage Considerations

  • Interpolated data is required.
  • Raw historical data needs to be normalized before it can be used.
  • Summarized trending and reporting.

Conformance Testing

Client Server

Read from history by specifying one of the supported aggregates

Support aggregate processing