A HistoricalEventNodethat has Eventhistory available will provide the Property. This Propertyis formally defined in Table 7.
Table 7– Historical Events Properties
|
Name |
Use |
Data Type |
Description |
|
Standard Properties |
|
|
|
|
HistoricalEventFilter |
M |
EventFilter |
A filter used by the Serverto determine which HistoricalEventNodefields are available in history. It may also include a where clause that indicates the types of Eventsor restrictions on the Eventsthat are available via the HistoricalEventNode. The HistoricalEventFilter Propertycan be used as a guideline for what Eventfields the Historian is currently storing. But this field may have no bearing on what Eventfields the Historian is capable of storing. |