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This optional default view period for the time of Validity (Tv) can be used to define the time span of data displayed in the time series display whenever the Tv button is selected. This view period is enforced every time the user switches to another display node. This view period is relative to the Tv of the time series in the display and not to T0. This element is required when you have configured a timeOfValidity element in the flagSourceColumns.xml configuration file. The functionality of Time of Validity is more exhaustively described in the Validation Status page.
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