Re: OPM vs. ILE

[David Silber <david.silber@xxxxxxxxxxxxxxx>]

A couple of comments in response to Jim Essinger's contribution.

(1) Pedantic -- I believe the O in OPM stands for Original, not Old
(2) You don't need ILE to create a pgm that does all your file I/O. We use
OPM COBOL and from the beginning designed a high-level I/O handler which all
'application' pgms call and a low-level handler (containing the Select
clause etc.) that does the actual I/O. Only the high-level handler calls the
low-level handler, thus insulating regular programs from the real I/O. This
has served us well because record sizes frequently increase and when they
do, we only have to change the high- and low-level handlers.
(3) Pointers - we are using Pointers, though in a limited way, in OPM COBOL.
(4) In my view, it would be a very unusual company that could take advantage
of C, COBOL, CL and RPG to warrant putting an application under ILE. I could
see a combination of 2, maybe 3 but not more. Having said all that, I'd
still like to go to ILE COBOL because that's the only one that is going to
support parts of the COBOL 2002 standard. But that decision isn't mine to
take.

David Silber, Quality Consultant
HPD Software Ltd



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