| general |  |  |  |  |  | Top level for general info about the model | Yes |  | 
|  | model |  |  |  |  | Name of the package | Yes | ranger | 
|  | version |  |  |  |  | Use: 2 | Yes | 2 | 
|  | type |  |  |  |  | Use: tree | Yes | tree | 
|  | mode |  |  |  |  | Only for Cubist |  | ifelse | 
|  | divisor |  |  |  |  | Only for Cubist, divide the entire formula by |  | 3 | 
|  | is_glm |  |  |  |  | Boolean, to identify a glm model (MARS models) | Yes | 0 | 
| trees |  |  |  |  |  | Top level for trees | Yes |  | 
|  | [tree #] |  |  |  |  | Index tree number, one per tree | Yes |  | 
|  |  | [branch #] |  |  |  | Index branch number, one per branch | Yes |  | 
|  |  |  | prediction |  |  | Estimate value | Yes | versicolor | 
|  |  |  | path |  |  | Top level indicating a path | Yes |  | 
|  |  |  |  | [[path #]] |  | Index path number | Yes |  | 
|  |  |  |  |  | type | Type of field, use: ‘conditional’, and ‘ordinary’ for
intercept | Yes | conditional | 
|  |  |  |  |  | col | Column name | Yes | Petal.Length | 
|  |  |  |  |  | val | Value of the entry | Yes | 2.45 | 
|  |  |  |  |  | op | Operator for formula | Yes | equal | 
|  |  |  |  |  | is_intercept | Only for Cubist |  | 0 | 
| terms |  |  |  |  |  | Top level for terms | MARS only |  | 
|  | [index] |  |  |  |  | Index number, one entry per term | MARS only | [[3]] | 
|  |  | label |  |  |  | Name of the field to be used | MARS only | char_cyl6 | 
|  |  | coef |  |  |  | Coefficient value | MARS only | -4.26 | 
|  |  | is_intercept |  |  |  | Boolean, indicates if it is intercept | MARS only | 0 | 
|  |  | fields |  |  |  | Top level for fields impacted by term | MARS only |  | 
|  |  |  | [index] |  |  | Index number, one entry per field | MARS only | [[1]] | 
|  |  |  |  | type |  | Type of field, use: ‘conditional’, and ‘ordinary’ for
intercept | MARS only | conditional | 
|  |  |  |  | col |  | Column name | MARS only | char_cyl | 
|  |  |  |  | val |  | Value of the entry | MARS only | cyl6 | 
|  |  |  |  | op |  | Operation, use: equal | MARS only | equal |