I have a couple of questions about the Project Layers work -- please 
excuse if they're too early in the process:

(1) I decided to try again with externalizing a Wonderland in a 2.7a 
image with all updates.

First, I did in a workspace:
w := Wonderland new.

Then in the Wonderland, I loaded up my Favorite Generic Purple 
Dinosaur, and moved him around (including spinning his head around 
demonically a few times :-), then typed back in the original 
workspace:

(ImageSegment new copyFromRootsForExport: (Array with: w))
		writeForExport: 'wonderland.extSeg'.

I got an error "Trying to write out, AnObsoleteWonderlandActor2"  Is 
the complete externalized segment system not in the update stream 
yet, or am I using it incorrectly?

(2) Which leads into my second question: How will one associate 
classes with an externalized segment?  If I create an Active Essay in 
a Project, creating some new classes in the process, how do I get my 
new classes to save out when I save out an externalized version of 
the Package containing the Project?  My (limited) understanding of 
the segmentation system is that it saves out the objects in the 
project/package, but not necessarily the class definitions associated 
with those objects -- is that correct?

Thank you!
   Mark
--------------------------
Mark Guzdial : Georgia Tech : College of Computing : Atlanta, GA 30332-0280
(404) 894-5618 : Fax (404) 894-0673 : guzdial at cc.gatech.edu
http://www.cc.gatech.edu/gvu/people/Faculty/Mark.Guzdial.html