naming conventions for programs and copybooks...

List,

I need some advice on naming conventions for programs and copybooks. What 
brought this to my attention is that I discovered in my conversion efforts 
that I have a COBOL program (sub-routine) with a corresponding copybook that 
have the same name.

It was my understanding from others that I've spoken with that source "type" 
(or suffix - not sure of the correct term in the iSeries world) should be 
CBLLE for COBOL/ILE and SQLCBLLE for COBOL/ILE+SQL.

I realize it is probably better not to have a copybook and program with the 
same names, but how is this handled in the iSeries world. Separating them to 
two different sourcefiles may not be enough because both may be searched 
during a compile procedure.

Is there a way to differentiate between a program source vs. a copybook?

What is the recommended way to handle this problem and why?  TIA!