Øystein:
Readings
http://en.wikipedia.org/wiki/Petri_net
en.wikipedia.org/wiki/Weka_(machine_learning)
Look into
YuvalShahar_TemporalAbstraction.pdf
Shahars: KnaveII: Visualization: SB Martins: http://medinfo.ise.bgu.ac.il/medlab/Other/Knave/KNAVE_poster.pdf
And the work on Process Mining
http://www.processmining.org/research/start
By van der Alst