The 12th volume of ToPNoC contains revised and extended versions of a selection of the best
workshop papers presented at the 37th International Conference on Application and Theory of
Petri Nets and Concurrency Petri Nets 2016 and the 16th International Conference on
Application of Concurrency to System Design ACSD 2016. It also contains one paper submitted
directly to ToPNoC. The 9 papers cover a diverse range of topics including model checking and
system verification refinement and synthesis foundational work on specific classes of Petri
nets and innovative applications of Petri nets and other models of concurrency. Application
areas covered in this volume are: security service composition databases communication
protocols business processes and distributed systems. Thus this volume gives a good overview
of ongoing research on concurrent systems and Petri nets.
