The first field of the Validation-Set is a path to a TPT file. The second field of the Validation-Set is an execution configuration.
Example: We have a folder "run". In this folder are the tpt file "run.tpt", our reference folder called "refdata" and after running "run.tpt" a folder called "testdata". Below "refdata" and "testdata" we have a folder with the name of our tpt file, here "run" and below there a folder with the configuration as name, e.g. "foo".