Another silly question

What’s the best way to write a schema for a flatfile with a positional header and a delimited body. One schema, two schemas? I know it’s a newbie question, but I really need to figure this out. It all has to do with parsing these infernal human readable reports that we must have information out of. I could just cludge it, but I’d really rather not and actually parse the files correctly. Any ideas/suggestions would be great.

Thanks,

Jon