Map List Data Processor

Data processor
Name	The name of the data processor currently in use by the selected leaf. To change data processor, select the name property and click on the ellipsis button. Select the appropriate data processor in the form that is displayed.
Settings
Expressions	A list of constant expressions to execute. Select the property and click on the ellipsis button to display the expression editor.
Fallback format	This is a format string, please see MSDN for more information on format strings, allowing you to add the value of the source column to your fallback value. Add {0} anywhere in your format string to add the value of the source column. The fallback format is only applicable / only used if fallback options is set to Fallback.
Fallback options	The fallback option defines what should happen if none of the expressions give a match. The default option is to abort the execution if there is no match, but you can also set the result value to null or to the result of a format string.
Source column	The value of the source column is matched against your supplied list of constant expressions.

When the processor executes, the value of the source column is compared to the supplied Map Constants, in the order they appear in the list, until a match is found or all expressions have been executed. The fallback options property, described above, determines what should happen if there is no match.

The Case sentitive flag determins if the string comparison should be case sensitive.

The result is a format string, allowing you to write constant expressions as well as embedding the source column value in the result. Add {0} anywhere in your format string to insert the value of the source column at that position.