By Kurt Jensen
This booklet provides a coherent description of the theoretical and sensible aspects
of colored Petri Nets (CP-nets or CPN). It indicates how CP-nets were developed
- from being a promising theoretical version to being a full-fledged language
for the layout, specification, simulation, validation and implementation of
large software program platforms (and different structures within which humans and/or computers
communicate through a few kind of formal rules). The book
contains the formal definition of CP-nets and the mathematical concept behind
their research tools. despite the fact that, it's been the purpose to write down the booklet in
such a manner that it additionally turns into beautiful to readers who're extra in
applications than the underlying arithmetic. which means a wide a part of the
book is written in a method that is toward an engineering textbook (or a users'
manual) than it's to a customary textbook in theoretical laptop technology. The book
consists of 3 separate volumes.
The first quantity defines the web version (i.e., hierarchical CP-nets) and the
basic ideas (e.g., different behavioural houses corresponding to deadlocks, fairness
and domestic markings). It provides an in depth presentation of many smaIl examples
and a quick review of a few commercial purposes. It introduces the formal
analysis equipment. FinaIly, it includes a description of a suite of CPN tools
which aid the sensible use of CP-nets. lots of the fabric during this quantity is
application orientated. the aim of the quantity is to educate the reader how to
construct CPN versions and the way to examine those via simulation.
The moment quantity features a special presentation of the idea at the back of the
formal research tools - particularly incidence graphs with equivalence
classes and place/transition invariants. It additionally describes how those research methods
are supported by means of computing device instruments. elements of this quantity are relatively theoretical
while different components are software orientated. the aim of the amount is to teach
the reader the best way to use the formal research tools. this may now not unavoidably require
a deep knowing of the underlying mathematical thought (although such
knowledge will after all be a help).
The 3rd quantity includes a precise description of a variety of industrial
applications. the aim is to record an important principles and experiences
from the initiatives - in a manner that is priceless for readers who don't yet
have own event with the development and research of huge CPN diagrams.
Another goal is to illustrate the feasibility of utilizing CP-nets and the
CPN instruments for such initiatives.
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Additional resources for Coloured Petri Nets: Basic Concepts, Analysis Methods and Practical Use
By identifying them (and by highlighting the corresponding places in different ways, as explained in Sect. 6), the modeller may greatly enhance the consistency and the readability of the model. 8. Use different kinds of colour sets. It is important to know how to use the different kinds of colour sets - such as indexed sets, cartesian products and lists. CPN ML contains a number of different colour set constructors. Enumeration colour sets are often used to identify processes or tasks. ). , car(l), car(2), ...
Each data base manager has three different states: Inactive. Waiting (for acknowledgments) and Performing (an update requested by another manager). Each message can be in four different states: Unused. Sent. Received and Acknowledged. Finally. the system can be either Active or Passive. Initially all managers are Inactive and all messages are Unused. This is indicated by the initialization expressions. • the set A considered as a multi-set). When a manager. s. decides to make an Update and Send Messages.
This means that each transition removes exactly one token (from the place of the predecessor state) and adds one token (to the place of the successor state). 6. Use the net structure to model control and the net inscriptions to model data manipulations. , the places, transitions and arcs) in a similar way as the control structures of an ordinary programming language, while the net inscriptions are used for the detailed data manipulations. 17 indicates how some of the usual control structures can be represented in a CP-net.