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Background documentation Graphic: Extending Visibility  Locate the document in its SAP Library structure

 

This graphic is explained in the accompanying text

The above graphic clarifies the principle of extending the visibility of package elements over several levels.

P1 and P2 are two main packages. The object IF_1 (from the sub-package P1_2) is passed up to the interface I1 (of the main package P1) using the package interface I2_3 through I1_2. This makes it visible in P2.
Conversely, the element FM_1 is only added to the package interface I2_1, so it is not passed up to the next level. This means that its visibility is not extended any further; it is limited to subpackage P1_1. In contrast, TAB_1 cannot be seen outside P1_2, since it has not been added to any of its package interfaces.

 

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