Control characters in spoolfiles

Once upon a time, there was an operator, who copied a spoolfile to a 
physical file, using, CPYSPLF.  Then the original spoolfile was deleted 
and gone forever, he thought.

But, is there a way to reconstruct the spoolfile, given the PF the 
spoolfile was copied into?.  I've been thinking of creating a small pgm, 
that reads the PF, and writes to a PRTF.  I can see the control characters 
from the spoolfile.  They  are "1"(new page), "-"(I don't know), "0"(I 
don't know) and " "(blank- I don't know).

Where can I find the meaning of these control characters, or even better - 
is there a way to "reconvert" the PF back to the original PRTF? 


Mvh.

Geir Kildal
TietoEnator AS