Basic things like publisher, subscriber, component are now available. No session and call synchronization available yet, so it is really very basic, but still simpler than the java like approach I used by the old dflo. Instead of InputPort and OutputPort I use subscriber and publisher. The components can have multiple subscriber and publisher. This way it is very natural to nest components into each other if necessary. So it is easy to create an inner communication as well. I tried out this approach with the observer example of the old dflo, and I think it was a huge success. I am thinking on removing the Class from the project.