Sorry for the late reply...
argfile XML: This is a file that can contain all the parameters that can be defined on the command line. So for example you could construct an XML file that could contain the project name and the password for your SQL server instance and the force flag. (It works in a similar way to some of our other products like the SQL Compare command line..)
so for example the xml could look like:
The SQL Doc project file is a little more complicated.
I will write down over the next couple of days what the parameters of the SQL Doc file are. However I would say that it could change in the future.
Hope that helps, and I am sorry for the delay.