What for? (2nd part global declaration in transformation)

Question

Hi Experts,
does anybody know, what for is the 2nd part global declaration in a routine of a transformation?
Myself I'm a developer, so I can differ between global and local declaration in a class-definition. But the second possibility to declare variables is outside of class-definition and class-implementation.
I checked start routine, end routine and character/ keyfigure routine. I can see both of the declaration. Does it makes any sence to use this declaration?
$$ begin of global - insert your declaration only below this line  -
    ... "insert your code here
$$ end of global - insert your declaration only before this line   -
$$ begin of 2nd part global - insert your code only below this line  *
... "insert your code here
$$ end of 2nd part global - insert your code only before this line   *
Thanks in advance.
Greets Nico

Answer 1

Hi Lijo,
first, thank you for you answer.
I'm not sure if I got it.
If you want to use a global variable for all packages that will be processed, I have to declare a CLASS-DATA. That means the instance of the class won't be deleted the whole data package.
If I want to use a global variable that will be used in character/ keyfigure routine it's sufficient to declare DATA in 1st or 2nd part of declaration.
I understand it in a way, that the second declaration part is redundant. Is it right?
Thanks in advance.
Greets Nico