NSController and subclasses

[Fred Kiefer]

I am still trying to get the Books application to compile with GNUstep.

Amongst many other things that are still missing, we also need
NSController and the two subclasses NSObjectController and
NSArrayController. All these classes have been added to AppKit in MacOSX
10.3 and extended in 10.4. GNUstep still doesn't have them.

These classes need key-value coding and observing to be fully functional
and NSObjectController also uses some classes from the coredata
framework. This lets me doubt, if we really should put these classes
into gui. What about having a coredata framework in the GNUstep SVN and
add these classes as an extension to that?

Any opinions?
Fred