| Class | Description | 
|---|---|
| FieldIndex | 
 Class used to hold operating field index, intermediate data and final results for a stats calculation. 
 | 
| UnivariateStats | 
 Calculate univariate statistics based on one column of the input data. 
 | 
| UnivariateStatsData | 
 Holds temporary data and has routines for computing derived statistics. 
 | 
| UnivariateStatsMeta | 
 Contains the meta-data for the UnivariateStats step: calculates predefined univariate statistics 
 | 
| UnivariateStatsMetaFunction | 
 Holds meta information about one univariate stats calculation: source field name and what derived values are to be
 computed 
 |