Function Group and Function Module are said to belong together logically. Function groups are considered to be containers of the Function Modules.
The differences between Function Groups and Function Modules are as follows :
* Function Groups need not be defined in Function Module but however, the latter one must be defined in Function Groups.
* Function Modules are able to be called from various kinds of programs. Function Groups can't be called.
* Function Groups acts as Function Module's containers but the latter one doesn't act as containers.
