Isn´t base everything thats on the base.tgz file? I allways thought so. While your at killing the base section, kill the other sections also. Its all a bloody mess. Graphics stuff is in libs, x11 stuff in games, some dev packages are in dev, some in lib some somewhere else.
Just some examples: Why are devscripts in util and not in devel? Aren´t they for developement? Why are xmanpages/xbook in X11 and not in doc or devel? As I see it there are several sortings mixed: priority: thats why theres base interface: X11 contents: devel, libs, graphics, net, web... useage: games, devel, graphics, lib, ... what they do: otherosfs, mail, net, web,... Package are where maintainers though they could be and no proper sorting is done. Also a plane structure as present doens´t even work. You can´t bring the interface, the contents, the priority, the work done and the purpose of a package into one flat tree. May the Source be with you. Goswin