The second mode to realize graph transformations is called Interpretation mode.
This is a more sophisticated mode, applying not only
one rule at a time but a whole sequence of rules.
The order of rules to be applied is defined non-deterministically in general. Starting the
interpretation by clicking on the Start button in menu
Transform, a rule is chosen randomly and applied.
Thereafter, the next rule is chosen randomly and applied, and soon.
Using rule layers, as in the example above, we can define some kind of control flow on graph transformation.
Such transformations are called layered graph transformations.
The graph transformation will stop if either there are no more
rules applicable, or the user has chosen item Stop in
menu Transform.
In this mode transformation options show after step,
wait after step and select new objects after step
can help to analyse the interpretation process.