These examples demonstrate the use of a simple text file to fill a form. As "Data Supplier" may also be used (x)fdf files.
If the data file is a (x)fdf file, so there is nothing further to be observed. A text file must, however, comply with the following rules:

"Field name in the form = Value to be entered"

So for example:

"Address.LastName=Sanders"
"Address.City=New York"

By means of a control file pdf-FieldMerge has all the necessary instructions for filling the form.