calibartion absf. file

What are the values contained within this file? I am trying to calibrate a
touchscreen and I am getting sometimes a swap of x and y but when it seems
correct (x and y wise) the pointer is further to the side of the screen (on
all edges) than where the stilus is.

I would like to play with the values in this file to see if I can improve
the accuracy but would like some info on what those values are.