Enter or Calculate Data
In addition to mapping, you can enter literal values for output fields or use functions to calculate or transform data.
1. Select the output data field
![](../presto-onlinehelp/images/xpathPickerString.png)
you want to map.
2. To provide a literal value, set the Text option in the Output Node Settings panel and enter the value in the Text field.
3. To use a function to calculate a value, set the Function option in the Output Node Settings panel and:
![*](bullet.gif)
Select the function from the list.
MashZone NextGen has a set of built-in functions, but
MashZone NextGen developers or administrators can add functions to this list.