| Class | Description | 
|---|---|
| Example | 
 this class will store the raw data and the desired label 
 | 
| Example1D | 
 this class will store the raw data and the desired label
 the raw data here will be presented as 1D array 
 | 
| Example2D | 
 this class will store the raw data and the desired label
 the raw data here will be presented as 2D array 
 | 
| PredictedLabels | 
 this class is used for name alias
 this PredictedLabels class represents a TreeMap between the label to its score 
 | 
| Vector | 
 this class is used for name alias
 this Vector class represents a HashMap between the feature index to its value 
 |