Objects That Can Be Documented  

In the SAP system, objects that can be documented are either interface components, such as data elements and messages, or components of the ABAP Development Workbench, such as domains and function modules. You can create objects with explanatory texts for these objects.

Using the maintenance transaction, however, you can also create documents that do not refer to any object in the system. Examples of this type of documentation are release information, general texts (which can be included as text modules in other documents), or chapters of online books. Documents of this type represent independent objects in the system.