<gsmarkup>
<objects>
<window title="My Window" delegate="#NSOwner" />
</objects>
</gsmarkup>
creates a window with title My Window, and sets the window
delegate to be the file owner (that is, the object which is passed as
the owner argument to the loadGSMarkupNamed:owner: call used
to load the file). The delegate is informed of basic events in the
window life (such as the window being miniaturized, or closed, or made
key), and can modify the window behaviour; please refer to the GNUstep
documentation for more information on delegates.