What is the significance of having multiple VIDF files defined for an IDFS data set?
If data within the VIDF file changes with time, for example calibration coefficients are modified, additional VIDF files can be defined. Each VIDF file designates the time period over which the file is applicable to the IDFS data set. By having multiple VIDF files, each designating a unique time period over which the file is valid, a history or log of data definitions can be maintained. Caution some parameters defined in the VIDF file are not changeable since changing these definitions are paramount to defining a new virtual data set.
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