RPG Cycle Newbie

["Malchow, Grizzly" <GMalchow@xxxxxxxxxxxxxxxxxxxxx>]

I have a question about Input Primary and Input Secondary files. I'll
first show the F and I specs.

 

FFILEA     IP   E           k Disk    Prefix( Inp )

FFILEB     IS   E           k Disk    Prefix( Stp )

 

 

IFORMATA       01

I                                          InpPARENT      L1

IFORMATB       02                          

I                                          StpPARENT      L1

I                                          StpCHILD       L2

     I

These 2 files have parent/child relationships in them. I'm trying to
figure out which parent/child relationships are in FILEA, but not in
FILEB and vice versa. I also need to check certain fields of those
parent/child relationships that are in both of the 2 files. The only
thing I know about using Input Primary and Input Secondary files is that
I don't have to use a READ operation, so can someone give me a crash
course about this and can someone tell me if what I have so far is a
step in the right direction? I think I need an InpCHILD L2 I spec for
FORMATA, but I'm not sure. And finally, Can the RPG cycle be used in a
sub procedure? I didn't think it could. Can someone tell me if I'm right
or wrong about that? 

Thanks in advance and happy Thanksgiving.

Griz