[SPAM 1]procedure parameter names

[David FOXWELL <David.FOXWELL@xxxxxxxxx>]

Hi,
 
We're relooking at the naming conventions we are using for parameters in procedures.
 
RPG III was simple, with 6 character field names we had two syllables of 3 characters followed by 2 characters and a prefix I or O.
 
Then, when RPGIV came, we kept the 6 character field names but the prefix A was used for input and output. If the parameter name began with a vowel, the suffix is An. Nobody knows why.
Eg Elephant Name would have been IELPNM. Now it would be AnElpNm.
 
Furthur imposed, is the use of 2 data structures for the parameters.

So, we now have, for the procedure MonPrcNom (mon procédure nom !)

D MonPrcNom        PR              N                                                                                             
D AMonPrcNomIn                        LIKEDS (MonPrcNomInDs) CONST         
D AMonPrcNomOut                       LIKEDS (MonPrcNomOutDs)                                                                                 

In the definition of the DS you find the actual parameter names eg,
D MonPrcNomInDs    DS                 TEMPLATE QUALIFIED      
D  AnElpNm                            LIKE(DFN_ELPNM)

Note that the prefix A or An is now in 2 places, because the actual parameter name is AMonPrcNomIn.AnElpNm. Somewhere in there is the elephant's name!

Any thoughts? 
Thanks.