Understanding PRTFIL and PRTOBJ

There are two different types of report functions: Print File(PRTFIL) and Print Object(PRTOBJ).

The PRTFIL function is an external function type that specifies a complete report in itself
PRTOBJ is an internal function type that specifies a segment of a report for inclusion within another report function.

Note: Page headings and footers are always defined by the PRTFIL function.