OK, so I wasn't off the mark in my email.
BTW, I usually use precompiler directive to pull in these data structures
from the underlying physical files, but not always.

#pragma mapinc("FILTFILE", "XCENTERDTA/XCFILTFILE(*ALL)","input key
lvlchk","_P")

Elvis

-----Original Message-----
 Subject: [C400-L] Re: External data structures

> I don't code in RPG so even though I've heard of external data structures
I
> am not sure I know what they mean.

External data structure is a struct who's layout would be defined by a
physical file (external to the program).  If the physical file layout
changed, the program would need to be recompiled to pick up the new
layout for the struct.

david



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