Invited Papers -- Petri Nets, Discrete Physics, and Distributed Quantum Computation -- Autonomous Distributed System and Its Realization by Multi Agent Nets -- Petri Nets Without Tokens -- Toward Specifications for Reconfigurable Component Systems -- Generating Petri Net State Spaces -- Full Papers -- Markov Decision Petri Net and Markov Decision Well-Formed Net Formalisms -- Comparison of the Expressiveness of Arc, Place and Transition Time Petri Nets -- Improving Static Variable Orders Via Invariants -- Independence of Net Transformations and Token Firing in Reconfigurable Place/Transition Systems -- From Many Places to Few: Automatic Abstraction Refinement for Petri Nets -- A Compositional Method for the Synthesis of Asynchronous Communication Mechanisms -- History-Dependent Petri Nets -- Complete Process Semantics for Inhibitor Nets -- Behaviour-Preserving Transition Insertions in Unfolding Prefixes -- Combining Decomposition and Unfolding for STG Synthesis -- Object Nets for Mobility -- Web Service Orchestration with Super-Dual Object Nets -- Synthesis of Elementary Net Systems with Context Arcs and Localities -- Nets with Tokens Which Carry Data -- Operating Guidelines for Finite-State Services -- Theory of Regions for the Synthesis of Inhibitor Nets from Scenarios -- Utilizing Fuzzy Petri Net for Choreography Based Semantic Web Services Discovery -- Formal Models for Multicast Traffic in Network on Chip Architectures with Compositional High-Level Petri Nets -- Name Creation vs. Replication in Petri Net Systems -- Modelling the Datagram Congestion Control Protocol's Connection Management and Synchronization Procedures -- The ComBack Method - Extending Hash Compaction with Backtracking -- Computing Minimal Elements of Upward-Closed Sets for Petri Nets -- Tool Papers -- ProM 4.0: Comprehensive Support for Real Process Analysis -- dmcG: A Distributed Symbolic Model Checker Based on GreatSPN -- Workcraft: A Static Data Flow Structure Editing, Visualisation and Analysis Tool.