Select the Processor Configuration tab and click on Add Processor.
Select the Basic tab.
The Invoke function name is used for invoking the specific script function.
The Expose XML as variable exposes XML Object as variable to script.
In the Conditional Execution tab, you can set additional processor execution conditions. The Transaction data dependent condition may be specified here as enhanced expression. If this expression returns anything other than TRUE (ignore case) – this processor will be skipped. No additional configuration for this Processor is required.