[rt-devel] extending rt3 classes?

[Alex Porras]

Can someone point me to some documentation for extending rt3 classes?  We
have a type of class we'd like to implement, that is similar to a ticket,
and the idea I had in mind was to subclass Ticket.pm, but, I'm not sure
that's possible because of the *_Overlay structure.

I checked the documentation here (http://bestpractical.com/rt/docs.html)  
and did not see anything like a developer guide, etc.  I also checked some 
of the perldocs for the RT::* libraries, but maybe I missed one.  Any help 
would be appreciated.

Thanks,

--Alex