Previously we looked at using DFE to help make scripts that utilize XML to make it more readable and easier to parameterize. There is another way to use DFE, beyond making a script more readable. Sometimes DFE may be required for the script to run properly. Some applications use what is called GWT (Google Web Toolkit). To use GWT DFE, first you need to identify when an application is using GWT.
DFE is short for Data Format Extension. In simple terms DFE allows for easier LoadRunner scripting by allowing us to decode and encode normally unreadable or formatted data that the may be sent between the client and the server.