inheritance in the Glib object system

[foret <foret rsbs anu edu au>]

Hello !

A general question :

Is there any documentation on the Glib/GObject inheritance mechanism ?
For example, is when a child calls overides a parent's  function, is 
there any way to call the parent's function implicitly or explicitly.
(Of course, I'm thinking of the "super();" statement of some other 
language).
Is there anything special about the inheritance of callbacks ?

Thanks a lot !

SF