| Class | QueryState | No class docstring; 1/1 methods documented | 
| Class | NumberQueryState | Create a new NumberQueryState object. | 
| Class | StringQueryState | Create a new StringQueryState object. | 
| Class | DateQueryState | Create a new DateQueryState object. | 
| Class | DateIntervalQueryState | Create a new DateIntervalQueryState object. | 
| Class | QueryExecuter | A QueryExecuter is responsible for taking the state (as in QueryState) |