08:38 < testi> Let's assume (for fun) the seom is an object oriented library.
               Example: seomClient and seomStream are classes inside the
               package seom. seomStream is an abstract class and has a
               constructor. seomStream has subclasses for input and output.
               InputSeomStream delivers method to read frames, and
               OutputSeomStream delivers methods to write frames :)
08:39 < testi> while the superclass delivers methods to access different
               "file"-types, sockets etc :)