the local model
The local model uses other datatypes for the storage of data and may hold some additional information that are generated from the model store data. It can be viewed as some sort of cache for the local work. Especially because we expect larger datasets to be handled this local mode is somewhat needed to make it work even with a remote model store.
It provides to interfaces into the two directions data are moved in and out. The GUI does the manipulation of the local model and then updates need to be signaled to the model store. And the other way around, if someone changes some data in the, later available, model store the model needs update the local model and signal changes to the GUI.
