Re: RPG/400 Definition (was Using VARLEN DDS keyword)

On Wed, 17 Jan 2001, Lynette Chronister wrote:

> so i am mistaken when someone uses the term RPG/400 and i think that this is 
>a higher level than RPGIII?... Lemme get this straight.
> 
> RPGII
> RPGIII
> RPGIV  are the actual languages.
> then what does ILE or /400 stand for?
> when someone says they program RPG/ILE, what does that mean vs RPGIV?
> 
> Lynette Chronister


Language     Compiler Name                             Source Type
-------      ---------------------------------------   -----------
RPG II       IBM AS/400 System/36-Compatible RPG II    RPG36
RPG III      IBM RPG/400                               RPG
RPG IV       IBM ILE RPG/400                           RPGLE


ILE stands for "Integrated Language Enviornment".  Many different
languages particpate in this enviornment, including RPG, COBOL, CL
and C.  In ILE, the compiler creates a module which can then be
bound to zero or more additional modules to create a program or
service program.  

ILE has nothing to do with the syntax of the statements written in
your source member, it only affects how something is compiled and/or
run.  

RPG IV is the only version of RPG (so far) to be written to use the
Integrated Language Enviornment, so it is sometimes referred to as "ILE
RPG" or "RPG-ILE".   However, in my opinion, this only confuses people.

The "/400" is part of the name of the compiler product.  IBM added it to
let you know that this is a compiler for the AS/400.   To add to the 
confusion, sometimes people refer to "RPG/400" as being the AS/400
version of RPG III to distinguish it from the System/38 version.  After
all, the compiler for the AS/400 is called "RPG/400", the one for the
Sys/38 was not.  

I think that pretty much answers your questions :)


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