Specifies an input file to be transformed. If you specify more
than one input file name, the sap2afp command
concatenates the files. The results are written to a single output
file (if one is specified) or to standard output.
The data in
the file must be in stream mode. That is, it must not contain any
record data.
If you do not specify an input file, or if you
specify a dash (-) as the file name, sap2afp uses standard input.