Model
            
            Properties
| Children | Returns a list of child terms referenced by this term. | 
| Column | Returns the number of numerical columns the term maps to. | 
| Columns | Enumerates the numerical columns the term maps to. | 
| IsBound | Gets whether all the variables in the term are bound to a column in a data frame. | 
| IsReducible | Gets whether the term can be reduced to a derived term or set of terms. | 
| Kind | Returns the kind of term. |