I am not sure I got the idea of having the two different extension-points
to define services (org.eclipse.tml.framework.device and
org.eclipse.tml.serviceDefinition)
My understanding is that the goal of having two extension points is
basically defining basic service information through
"org.eclipse.tml.framework.device" and allowing them to be customized by
the "org.eclipse.tml.serviceDefinition" (which also defines handlers for
the state transitions).
This way one plug-in can define the services available and other plug-ins
could provide the different "implementation" for that same service.
Did I get the idea?
If my understanding is correct I would like to suggest merging these two
extension points in one (in order to avoid confusion) and add the
capability of defining services as abstract and allowing services to
extend parent services (something similar to what CDT does with elements
of the org.eclipse.cdt.managedbuilder.core.buildDefinitions)