Parameter Required? Value dimension Yes Dimension column in the dataset used to sort records when calculating the delta values. epoch Yes Epoch date column in the dataset used to sort records within each dimension when calculating delta values. inputMeasure Yes Measure column on which you want to calculate the delta. outputMeasure Yes Name of the output column that contains the delta value. source Yes Node in the dataflow definition file that contains the dataset to which you want to add the delta column.