import models/SimpleClassDiagrams as SimpleClassDiagrams SimpleClassDiagrams PetriNets_Design{ SimpleAttribute Natural {} SimpleAttribute String {} Class Place { tokens : Natural name : String } Class Transition {} Association P2T (Place, Transition) { weight : Natural } Association T2P (Transition, Place) { weight : Natural } } export PetriNets_Design to models/PetriNets_Design