How to create a constant that differs from Dev to Test to Prod

Hello,

I am customizing our CRM PCUI application (5.0 CRM under 7.0 EP and NW 2004s).

In one of the tabs, we call a BW webquery.

Obviously, the URL cannot be hardcoded in the ABAP controller class, but must be declared somewhere else, so that the Sys Adms may change it whenever needed, in any environment.

I have read there is, in the Customizing, an Information System - Variables section that lets you do this, but this is NOT present in our system! In my Information SystemS section (I do not have an Information System without the "S"), we have: Logistics, Administration... but no variables section! Does that correspond to a transaction?

Is there any other flexible way to declare global (cross - Class) constants in the ABAP environment?

Thanks and... points awarded to the brave ones 😊

Riccardo