Table 3.
Mapping values for basic and collections types.
| Type | Mapping value | 
|---|---|
| Numeric |  | 
| Boolean |  | 
| String | “ ” | 
| List | List(x.head), x.tail, x.reverse, Nil | 
| Tuple |  ,   | 
| General | null | 
Description: x represents the value generated by the original mapping function; k and v represents the key and value generated by the original mapping function in case of Key-Value tuples;  and
 and  represents modified values for the key and value, which is the application of other mapping values respecting the type.
 represents modified values for the key and value, which is the application of other mapping values respecting the type.