A HistoricalEventNode that has Event history available shall provide the Property. This Property is formally defined in Table 10.
Table 10 – Standard Historical Events Properties
|
Name |
Use |
Data Type |
Description |
|
HistoricalEventFilter |
M |
EventFilter |
A filter used by the Server to determine which Event fields are available in history. It also includes a where clause that indicates the types of Events or restrictions on the Events that are available via the HistoricalEventNode. The HistoricalEventFilter Property can be used as a guideline for what Event fields the Historian is currently storing. But this field may have no bearing on what Event fields the Historian is capable of storing or what was stored in the past. |
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ConformanceUnits |
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