The SOR$PASS_FILES routine passes the names of input and output
    files and output file characteristics to SORT or MERGE.

    Format

      SOR$PASS_FILES  [inp_desc] [,out_desc] [,org] [,rfm] [,bks]

                      [,bls] [,mrs] [,alq] [,fop] [,fsz] [,context]