Thus, models and theories of concurrency, the oldest one being Petri nets, and their relation to objects are an attractive topic of study.This book presents state-of-the-art results on Petri nets and concurrent object-oriented programming in a coherent and competent way.

Section I.- Object Oriented Modelling with Object Petri Nets.- Using Petri Nets for Specifying Active Objects and Generative Communication.- Object-Oriented Nets with Algebraic Specifications: The CO-OPN/2 Formalism.- CLOWN as a Testbed for Concurrent Object-Oriented Concepts.- Concurrency in Communicating Object Petri Nets.- Object Orientation in Hierarchical Predicate Transition Nets.- CoOperative Objects: Principles, Use and Implementation.- OB(PN)2: An Object Based Petri Net Programming Notation.- On Formalizing UML with High-Level Petri Nets.- Section II.- Modeling a Groupware Editing Tool with Cooperative Objects.- Modelling Constrained Geometric Objects with OBJSA Nets.- An Object-Based Modular CPN Approach: Its Application to the Specification of a Cooperative Editing Environment.- KRON: Knowledge Engineering Approach Based on the Integration of CPNs with Objects.- Modeling of a Library with THORNs.- Inheritance of Dynamic Behavior Development of a Groupware Editor.- Object Coloured Petri Nets - A Formal Technique for Object Oriented Modelling.- Section III.- An Actor Algebra for Specifying Distributed Systems: The Hurried Philosophers Case Study.- Formal Reasoning about Actor Programs Using Temporal Logic.- Flexible Types for a Concurrent Model.- High Level Transition Systems for Communicating Agents.- Schedulability Analysis of Real Time Actor Systems Using Coloured Petri Nets.- Control Properties in Object-Oriented Specifications.- Case Studies.- A Cooperative Petri Net Editor.- The Hurried Philosophers.