Function SYSMOD IDs

The IBM® convention for the SYSMOD ID of a function SYSMOD is tcccrrr, where:
t
is the type of function. These are the values used by IBM:
A
Licensed vendor or business partner base function
B
Licensed vendor or business partner dependent function
C, D
Reserved for future use
E
Unlicensed base function
F
Unlicensed dependent function
G
Reserved for future use
H
Licensed base function
I
Reserved for future use
J
Licensed dependent function
K
Reserved for future use

Names of user-written functions can start with any letters other than these.

ccc
For functions provided by IBM, this is the product code. It must be three alphanumeric characters (no vowels).
rrr
For functions provided by IBM, this is the release number. It identifies a specific function within a product. These three characters identify a specific release of a product function and must be alphanumeric.
Note: The former convention for the SYSMOD ID of a function was tvvvrrr.