FDF or XFDF file
FDF and XFDF files are used by Adobe Acrobat to store filled out form data.
The data source will always return a single row of data. The columns in this row derive from the fields in the original form.
An FDF or XFDF data source has the following settings:
The filename or the FDF or XFDF file. You may use an expression to set the file name.