General order infile may be used instead of general order in. The variable infile points to a file named <user>.xxx.data, where <user> is tso userident and xxx is the content of infile.
'Square of' word.1 'is' word.1**2
The action block will read the dataset 'R2D2.MYINPUT.DATA' provided that tso userident is R2D2.
The variable infile is primarily used when executing RXS in the background via JCL. See section 36.