The Data Item Control record contains:
Record identifier (the word “dataitem”)
Data item name
In sessions created from playback, the keyword estimated indicates a data item whose values were obtained by estimation from data items in other sessions
One data item control record exists for each data item that appeared in the current view’s definition. If alarms or filters or both are applied to the data item, their control records follow that data item’s control record. All of the alarm control records for the data item precede the filter control records for the same data item.