Which of the following is NOT a common Historical Attribute?

In the context of a data historian like AVEVA Historian, historical attributes typically represent key data elements that capture the essence of the data collected over time. Common historical attributes include Timestamp, Value, and Quality.

A Timestamp is crucial in representing when a particular data value was recorded, providing the temporal context needed for time-series data analysis. The Value attribute holds the actual data measurement or value, which is essential for interpreting the recorded information. The Quality attribute indicates the reliability of the data collected, helping users understand whether the data can be trusted for analysis.

AutoStart, however, is not typically classified as a historical attribute. Instead, it is more often associated with system configurations or settings related to the operation of the historian itself, defining whether or not the historian should automatically start under certain conditions. This distinction clarifies that AutoStart deals with operational properties rather than the core attributes that define historical data records.

Thus, the identification of AutoStart as the option that does not fit aligns with the understanding of what constitutes the primary historical attributes within a data historian framework.