Selected set (Portage)

The selected set Article description::contains the packages the admin has explicitly installed, those specified in the world and world_sets files. The selected set, together with the profile set and the system set, make up the world set. With a couple of exceptions, Portage will register selected set package atoms to the file.

External resources

 * https://forums.gentoo.org/viewtopic-t-1042252-start-11.html - A forum thread that discusses dependency calculation using the world file.