2018.1

Post function
On the Step properties pane, under Field Definition, you can enter a script in the Post function
field to be run after the extraction. (Click the Use JavaScript Editor button to open the Script
Editor dialog if you need more space.)
A Post function script operates directly on the extracted data. Its results replace the extracted
data. For example, the Post function script replace("-", ""); replaces the first dash character
that occurs inside the extracted string. The code toLowerCase(); converts the string to
lowercase letters.
Note that the function must be appropriate for the field's data type.
JavaScript Expression
Alternatively you can change a field's Mode from Location to Javascript:
1. Select the field in the Data Model.
2. On the Step properties pane, under Field Definition, change its Mode to JavaScript.
You will see that the JavaScript Expression field is not empty; it contains the code that was
used to extract data from the location. This code can be used or deleted.
Note
The last value attribution to a variable is the one used as the result of the expression.
Deleting a field
The list of fields that are included in an extraction is one of the properties of an Extract step. To
delete a field:
1. Select the field: click on the field in the Data Model, or select the Extract step that contains
the field that you want to delete, and in the Step properties pane, under Field Definition,
select the field from the Field List.
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