World set (Portage)

The world set encompasses the system set and the selected set.

Packages belonging to the world set are listed by default into the file.

It is the world file, together with the profile and (including ) settings, that defines what software is installed on the system.

Later, when a world update is requested (through emerge -uDN @world or similar command), Portage will use the world file as the base for its update calculations.