Live in fragments no longer. Only connect.
We wove a web in childhood, A web of sunny air.
Welcome to the world of Web services! This book is one of
the first in the new Deitel™ Developer Series, which presents
leading-edge computing technologies to software developers, technical managers
and IT professionals.
Anyone familiar with the software industry is aware that
Web services are one of 2002’s hottest new technologies. Microsoft coined the
term "Web services" in June 2000, when the company introduced Web services as
a key component of its .NET initiative, a broad new vision for embracing the
Internet in the development, engineering and use of software. As others began
to investigate Web services, it became clear that the technology could
revolutionize distributed computing. Software vendors quickly established Web
services strategies and began to enhance their products with support for Web
services standards. Now, nearly every major vendor—including Sun Microsystems,
IBM, Hewlett-Packard, Oracle and BEA Systems—is marketing Web services tools
Web services encompass a set of related standards that can
enable any two computer applications to communicate and exchange data via a
network, such as the Internet. The primary standard used in Web services is
the Extensible Markup Language (XML), developed by the World Wide Web
Consortium (W3C). XML is a meta-language for describing data and creating
markup languages; developers use XML tags to describe individual pieces of
data, forming XML documents. Since XML documents are text-based, they can be
processed on any platform. XML’s portability and its rapid adoption throughout
the industry made it an obvious choice for enabling cross-platform data
communication in Web services.
XML provides the foundation for many core Web services
standards, including the Simple Object Access Protocol (SOAP), the Web
Services Description Language (WSDL) and the Universal Description, Discovery
and Integration (UDDI) specification. SOAP is an XML vocabulary (i.e., an
XML-based markup language developed for a specific industry or purpose) that
enables programs on separate computers to interact across a network, such as
the Internet or a company intranet. WSDL, another XML vocabulary created for
Web services, allows developers to describe Web services and their
capabilities in a standardized format. UDDI is a framework that defines
XML-based registries in which businesses can publish information about
themselves and the services they offer.
Almost every type of business—from small organizations to
large, global enterprises—can benefit from Web services. Companies are already
implementing Web services to facilitate a wide variety of business processes,
such as expediting the development of corporate software, integrating
applications and databases and automating transactions with suppliers,
partners and clients. This book explains how developers and businesses can
harness the potential of Web services technology to facilitate
application-to-application communication and improve efficiency and
profitability. For programmers, the book includes appendices on XML,
implementing Web services in Java™ and implementing Web services in Visual
Who Should Read This Book
Deitel & Associates, Inc., offers several publications that
discuss Web services, intended for various audiences. We provide information
here and inside this book’s back cover to help you determine which publication
is best for you.
Web Services A Technical Introduction is the first book
in our A Technical Introduction series, which offers broad overviews of
new technologies. We designed this publication to be a "literacy" book that
explains Web services, explores the benefits they provide to businesses and
discusses key concepts related to the technology. This is not a programming
book, but it contains in-depth treatments of technical concepts. It also
includes significant programming appendices that present Visual Basic .NET and
Java Web services implementations. We believe that the information we present
will be useful both to programmers, who must learn to incorporate Web services
in their applications and networks, and to IT managers, who must decide when
and how to adopt this important new technology.
This book is divided into several sections. Chapters 1–4
present the business case for Web services. We introduce the basics of Web
services, describe Web services’ strengths and limitations and examine the
development of Web services standards. We also explore how companies can use
Web services to improve productivity and enhance their business models. These
chapters present numerous case studies that describe how specific companies
are employing Web services to integrate systems and improve communication
among departments, supply chains and partners.
Chapters 5–7 delve into more technical topics, including
explanations of core Web services technologies and standards. We begin by
introducing XML, its history and role in Web services. This leads to an
analysis of various XML-derived technologies that incorporate Web services,
including e-business XML (ebXML), Business Transaction Protocol (BTP),
Business Process Modeling Language (BPML) and Web Services Flow Language (WSFL).
We then examine the fundamentals of SOAP, including the SOAP messaging
specification, the architecture of SOAP messages and Remote Procedure Calls (RPCs).
We also discuss WSDL and present a sample WSDL document. We conclude by
exploring various technologies for locating Web services on a network,
including public and private UDDI registries, ebXML registries and
In Chapter 8, we describe a variety of software vendors and
the Web services development tools they offer. We also discuss vendors that
market Web services management and workflow products. This information is
designed to help programmers and IT managers identify tools and products that
best fit their Web services requirements. Following this broad overview of Web
services development platforms, we examine two of the most popular
platforms—.NET and Java—in detail. Chapter 9 examines Web services in the
context of Microsoft’s .NET platform, including the basics of creating and
consuming Web services in .NET. Chapter 10 explores Sun Microsystems’ Java
Web Services Developer Pack and its capabilities for developing and
deploying Web services that run on Java platforms.
The book’s final chapters provide a detailed analysis of
Web services security issues. In a memo to all Microsoft employees, Bill Gates
stated that the company’s highest priority is trustworthy computing—i.e.,
ensuring that Microsoft applications are reliable, available and secure.
Gates’s security emphasis has been echoed across the computing industry as
organizations work to improve Internet and network security. Security is
particularly crucial to Web services, and we therefore have included a
two-chapter treatment of security issues. Chapter 11 presents general computer
security concepts, such as cryptography, digital signatures and steganography.
In Chapter 12, we examine the set of emerging XML-based security standards
designed specifically for Web services.
The book concludes with programming appendices
that introduce XML markup and .NET and Java Web services implementations.
Appendices B and C contain complete, working examples of Web services
and Web service clients built using the standards and tools we discuss
throughout the book. We include this material as appendices, because
readers must have substantial knowledge of Visual Basic .NET and
Java to understand and run the programs. Readers interested in learning
these languages should refer to our publications Visual Basic
.NET How to Program, Second Edition, Visual Basic .NET for
Experienced Programmers and Java How to Program, Fourth Edition;
the inside back cover of this book contains additional information
on choosing the right book. For a detailed listing of Deitel™ products
and services, please see the "advertorial" pages at the
back of this book or visit
Readers also can register for our new Deitel™ Buzz Online
e-mail newsletter (www.deitel.com/newsletter/subscribe.html),
which provides information about our publications, company announcements,
links to informative technical articles, programming tips, teaching
tips, challenges, anecdotes and more.
As you proceed, if you would like to communicate with us,
please send an e-mail to
always respond promptly. Please check our Web sites,
www.InformIT.com/ deitel for frequent updates, errata, FAQs, etc. When sending an e-mail, please
include the book’s title and edition number. We sincerely hope that you enjoy
learning about Web services with our publications.
Features of Web Services A Technical Introduction
This book contains many features, including:
XML (Extensible Markup Language). XML is gaining
widespread popularity in the software-development and e-business
communities. As a platform-independent standard for describing data and
creating markup languages, XML is ideal for Web services. Many core Web
services standards—including SOAP, WSDL and UDDI—are based on XML. Chapter
5, XML and Derivative Technologies, examines the basic structure of XML
and overviews key concepts related to the technology. Appendix A,
Introduction to XML Markup, describes the fundamentals of XML markup,
including elements, attributes and character data.
Simple Object Access Protocol (SOAP). The
Simple Object Access Protocol is the lingua franca of Web services,
enabling interoperability among disparate applications. SOAP is a simple
markup language for describing messages between applications. Built using
XML, SOAP provides the platform and programming-language independence that
developers require to integrate applications and business processes across
the Web. Chapter 6, Understanding SOAP and WSDL, discusses the SOAP
specification and SOAP messaging.
Web Services Description Language (WSDL). The
Web Services Description Language provides developers with an XML-based
language for describing Web services and exposing those Web services for
public access. Chapter 6, Understanding SOAP and WSDL, examines the WSDL
standard and provides an explanation of a sample WSDL document.
XML Registries and Universal Description, Discovery and
Integration (UDDI). Before employing a Web service, an
organization must locate the service and learn about its capabilities. XML
registries, including those based on the Universal Description, Discovery
and Integration (UDDI) specification, provide common repositories through
which businesses can advertise themselves and their Web services. Chapter
7, UDDI, Discovery and Web Services Registries, introduces the
fundamentals of UDDI and XML registries.
.NET Web Services. The .NET platform is one of
the most complete environments for building, deploying and accessing Web
services. There are many benefits to implementing Web services in .NET,
including .NET’s support for multiple programming languages and its tools
for code reuse. Chapter 9, .NET Web Services: A Conceptual Overview,
introduces Microsoft’s .NET strategy and describes .NET’s support for Web
services. Appendix B, Implementing Web Services in .NET, introduces Web
services programming with Active Server Pages (ASP) .NET and Visual Basic
Java Web Services. The Java 2 Platform provides
rich support for Web services technologies. Java’s portability, along with
its support for XML and standard networking technologies, makes Java ideal
for building Internet applications, including those based on Web services.
Chapter 10, Java Web Services: A Conceptual Overview, introduces the Java
Web Services Developer Pack, which includes APIs for building Java-based
Web services and clients. Appendix C, Implementing Web Services in Java,
introduces Web services programming with the Java API for XML Messaging (JAXM)
and the Java API for XML-based RPC (JAX-RPC).
Web Services Security Standards. By enabling
organizations to move transactions beyond corporate firewalls, Web
services create significant security challenges. The software industry has
developed numerous XML-based standards to address Web services security,
including the Security Assertion Markup Language (SAML), the XML Key
Management Specification (XKMS), XML Signature and XML Encryption. Chapter
11, Computer and Internet Security, describes fundamental computer
security concepts; Chapter 12, Web Services Security, examines Web
services security standards and how organizations can ensure the security
of Web services transactions.
Web Services A Technical Introduction contains a rich
collection of illustrations, tables, and features that highlight significant
topics discussed in the text. In addition, each chapter includes objectives,
an outline and a summary to help readers identify the chapter’s key goals.
This organization, in combination with our extensive Index and glossary,
enable the book to be used as a reference. For readers who want additional
information on particular topics, all chapters conclude with Internet and Web
resources sections; many chapters also include recommended reading lists.
Each chapter begins with objectives that inform readers of
what to expect and give them an opportunity, after reading the chapter, to
determine whether they have met the intended goals.
The chapter objectives are followed by sets of quotations.
Some are humorous, some are philosophical, and some offer interesting
insights. We have found that readers enjoy relating the quotations to the
chapter material. Many of the quotations are worth a "second look" after
you read each chapter.
The chapter outline enables readers to approach the
material in top-down fashion. Along with the chapter objectives, the outline
helps readers anticipate topics and quickly locate information that is of
particular interest to them.
An abundance of charts, line drawings and Web screenshots
is included. The illustrations and figures provide visual examples of business
and technical topics. Charts and tables offer lists of additional resources
and break information into an organized, easy-to-read format.
Features and Case Studies
Most chapters contain features, which highlight and build
on concepts introduced in the body text. Many features provide case studies on
businesses that are implementing Web services, whereas others highlight key
Web services-related technologies.
Each chapter ends with a summary that helps readers review
and reinforce key concepts. Readers also can use the summaries to discover
what topics are discussed in each chapter.
Internet and Web Resources
Each chapter ends with an Internet and Web resources
section, which lists Web sites that readers can visit for additional
information on the chapter topics.
512 Works Cited
Almost every chapter includes a works cited section, which
contains books, articles, Web sites and other resources from which we derived
information for the chapter.
Most chapters include recommended reading lists, which
refer to books, articles and other resources relevant to the chapter. In most
cases, these reading suggestions represent the sources we found most
informative while writing the book.
The book’s extensive glossary summarizes the key terms in
each chapter. We include the glossary as a helpful reference.
Approximately 2268 Index Entries (with approximately 3,402
We have included an extensive Index. This resource enables
readers to search for any term or concept by keyword. The Index is especially
useful to readers using the book as a reference.
Approximately 3,433 Lines of Code in 18 Example Programs
(with Program Outputs)
For readers who are Java and/or Visual Basic .NET
programmers, the appendices include complete, working programming examples.
All examples are available as downloads from our Web site,
Appendices: Pedagogic Approach
Although Web Services A Technical Introduction is
not a programming book, we have included several programming appendices that
build on topics covered in the main text. These appendices contain a rich
collection of programming examples designed to introduce the basics of XML
markup and .NET and Java Web services. When presenting programming examples
and concepts, we concentrate on the principles of good software engineering
and stress program clarity.
Live-Code™ Teaching Approach
Several Web Services A Technical Introduction appendices
contain Live-Code™ examples. This style exemplifies the way we teach
and write about programming and is the focus of our multimedia Cyber
Classrooms and Web-based training courses, as well. Each programming
concept is presented in the context of a complete, working example
that is followed by one or more windows showing the program’s input/output
dialog. We call this method of teaching and writing the Live-Code™
Approach. Readers have the option of downloading all of the
code examples from
under the Downloads/ Resources
link. Other links provide errata and answers to frequently asked
questions. Features of our Live-Code™ examples include:
Syntax Highlighting. This book’s implementation
appendices use five-way syntax highlighting to emphasize various
programming elements. Our syntax-highlighting conventions are as follows:
errors and ASP .NET directives
text, class, method and variable
This is our term for the process we use to format programs so that they
have a carefully commented, open layout. The code is grouped into small,
well-documented pieces. This greatly improves code readability.
World Wide Web Access
All the source code for the program examples in the
appendices (and our other publications) is available on the Internet as
Registration is quick and easy and the downloads are free.
If you read the programming appendices, we suggest downloading all the
examples, then running each program as you read the corresponding discussion.
Make changes to the examples and immediately see the effects of those
changes—this is a great way to improve your programming skills. [Note:
This is copyrighted material. Feel free to use it as you study, but you may
not republish any portion of it in any form without explicit permission in
writing from Prentice Hall and the authors.]
In the appendices, we have included programming tips to
help readers focus on important aspects of program development. We highlight
these tips in the form of Good Programming Practices, Common Programming
Errors, Portability Tips and Software Engineering Observations.
6 Good Programming Practices
Good Programming Practices are tips that call attention
to techniques that will help developers produce programs that are clearer,
more understandable and more maintainable.
16 Common Programming Errors
Developers learning a language tend to make certain kinds
of errors frequently. Pointing out these Common Programming Errors
reduces the likelihood that readers will make the same mistakes.
2 Portability Tips
We include Portability Tips to help developers write
portable code and to provide insights on how programming languages achieve a
high degree of portability.
1 Software Engineering Observation
Software Engineering Observations highlight techniques,
structural issues and design issues that affect the architecture and
construction of software systems, especially large-scale systems.
Deitel e-Learning Initiatives
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and the emergence of 3G wireless technologies, it is projected that,
within two years, more people will access the Internet through wireless
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Deitel & Associates is partnering with Prentice Hall’s
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InformIT.com, to launch
the Deitel e-Matter series at
www.InformIT.com/deitel in Fall 2002. The Deitel
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The Deitel™ Developer Series
Deitel & Associates, Inc., is making a major commitment to
covering Web services and other leading-edge technologies through the launch
of our Deitel™ Developer Series. Web Services A Technical
Introduction and Java Web Services for Experienced Programmers are
the first Web services books in the series. These will be followed by several
others, including ASP .NET with Visual Basic .NET for Experienced
Programmers and ASP .NET with C# for Experienced Programmers.
Additional Deitel™ Developer Series books include C# A Programmer’s
Introduction, C# for Experienced Programmers, Visual Basic .NET
for Experienced Programmers and Visual C++ .NET for Experienced
Programmers, which cover .NET topics.
The Deitel™ Developer Series is divided into three
subseries. The A Technical Introduction subseries provides IT managers
and developers with detailed overviews of emerging technologies. The A
Programmer’s Introduction subseries is designed to teach the fundamentals
of new languages and software technologies to programmers and novices from the
ground up. These books discuss programming fundamentals, followed by brief
introductions to more sophisticated topics. The For Experienced Programmers
subseries is designed for seasoned developers seeking to learn new programming
languages and technologies without the encumbrance of introductory material.
The books in this subseries move quickly to in-depth coverage of the features
of the programming languages and software technologies being covered.
One of the great pleasures of writing a book is
acknowledging the efforts of many people whose names may not appear on the
cover, but whose hard work, cooperation, friendship and understanding were
crucial to the production of the book. Many other people at Deitel &
Associates devoted long hours to this project. Below is a list of our
full-time employees who contributed to this publication:
Tem R. Nieto, a graduate of the Massachusetts Institute
of Technology, is Director of Product Development at Deitel & Associates,
Inc. He is co-author of C# A Programmer’s Introduction, C# for
Experienced Programmers, Visual Basic .NET for Experienced
Programmers and numerous texts in the How to Program series.
Tem co-authored Chapter 5, XML and Derivative Technologies, and Appendix
A, Introduction to XML Markup, and certified all of the book’s technical
Sean E. Santry, a graduate of Boston College with
degrees in Computer Science and Philosophy, is Director of Software
Development at Deitel & Associates, Inc., and co-author of Java Web
Services. Sean co-authored Chapter 10, Java Web Services: A Conceptual
Overview and Appendix C, Implementing Web Services in Java.
Rashmi Jayaprakash, a graduate of Boston University
with a degree in Computer Science, co-authored Chapter 7, UDDI, Discovery
and Web Services Registries, and contributed to Chapter 8, Web Services
Platforms, Vendors and Strategies.
Su Zhang, a graduate of McGill University with a
Master’s in Computer Science, co-authored Chapter 10 and Appendix C and
contributed to Chapter 5. Su also is a co-author of Java Web Services.
Kyle Lomelí, a graduate of Oberlin College with a
degree in Computer Science and a minor in East Asian Studies, co-authored
Chapter 10 and Appendix C, contributed to Chapter 6, Understanding SOAP
and WSDL, and reviewed many of the book’s technical chapters. Kyle also is
a co-author of Java Web Services.
Jonathan Gadzik, a graduate of the Columbia University
School of Engineering and Applied Science with a major in Computer
Science, co-authored Chapter 10 and Appendix C, contributed to Chapter 6,
Understanding SOAP and WSDL, and reviewed many of the book’s technical
chapters. Jonathan also is a co-author of Java Web Services.
Cheryl Yaeger, a graduate of Boston University with a
degree in Computer Science, is the Director of Microsoft®
Software Publications at Deitel & Associates, Inc., and is the co-author
of C# A Programmer’s Introduction, C# for Experienced
Programmers and Visual Basic®.NET for Experienced
Programmers. She co-authored Chapter 9, .NET Web Services: A
Conceptual Overview, and Appendix B, Implementing Web Services in Visual
Christina J. Courtemarche, a graduate at Boston
University with a degree in Computer Science, contributed to Chapter 5.
Laura Treibick, a graduate of the University of
Colorado at Boulder with a degree in Photography and Multimedia, is
Director of Multimedia at Deitel & Associates, Inc. She enhanced many of
the graphics throughout the text, designed the cover and created the
graphics in the inside front and back covers.
Christi Kelsey, a graduate of Purdue University with a
major in Management and a minor in Information Systems, co-authored
several case studies in Chapter 4, Web Services and Enterprise Computing.
Barbara Deitel applied copy edits to the manuscript and
compiled the quotations for all the chapters.
Abbey Deitel, a graduate of Carnegie Mellon
University’s Industrial Management Program and President of Deitel &
Associates, Inc., co-authored Chapter 11, Computer and Internet Security,
and Chapter 12, Web Services Security.
Matthew R. Kowalewski, a graduate of Bentley College
with a degree in Accounting Information Systems, contributed to Chapter 9.
We would also like to thank the participants in the Deitel
& Associates, Inc., College Internship Program who contributed to this
A. James O’Leary, a senior in Computer Science and
Psychology at Rensselaer Polytechnic Institute, co-authored Chapter 11 and
Lucas Ballard, a senior at Brandeis University in
Computer Science and Mathematics, contributed to Chapter 1 and Appendix D,
Best Web Services Web Sites, created case studies for Chapter 4 and edited
the entire manuscript.
Jon Goldstein, a senior at Cornell in Computer Science
and Economics, contributed to Chapter 1 and Appendix D, Best Web Services
Web Sites, created case studies for Chapter 4 and edited the entire
Brian Foster, a sophomore at Northeastern University in
Computer Science, contributed to Chapter 8.
Ngale Truong, a sophomore at Northeastern University in
Computer Science, contributed to Chapters 5 and 6.
Matthew Rubino, a sophomore at Northeastern University
in Computer Science, contributed to Chapter 5, Chapter 8 and Appendix D.
Christina Carney, a senior in Psychology and Business
at Framingham State College, researched and co-authored the Internet and
Web Resources URLs and helped with the Preface and the glossary.
Marc Marinaccio, a senior at Brown University in
History, edited the entire manuscript and contributed to the glossary.
Mike Dos’Santos, a senior at Northeastern University in
Computer Science, contributed to Appendix C.
We are fortunate to have been able to work with the
talented and dedicated team of publishing professionals at Prentice Hall. We
especially appreciate the extraordinary efforts of our editor, Karen McLean of
Prentice Hall/PTR, and Michael Ruel, who managed the extraordinary review
processes for our Deitel™ Developer Series Web services publications.
We would also like to thank Mark L. Taub, Editor-in-Chief for computer
publications at PH/PTR, for conceptualizing the Deitel™ Developer Series
and providing the necessary environment and resources to help us generate the
many books in this series. A special note of appreciation goes to Marcia
Horton, Editor-in-Chief of Engineering and Computer Science at Prentice Hall.
Marcia has been our mentor and our friend for 18 years at Prentice Hall. She
is responsible for all aspects of Deitel publications at all Pearson
divisions, including Prentice Hall, PH/PTR and Pearson International.
Laura Treibick, the Director of Multimedia at Deitel
& Associates, Inc., designed the cover. Tamara Newnam (firstname.lastname@example.org)
carried the cover through to completion and produced the artwork
for our programming-tip icons.
We wish to acknowledge the efforts of our reviewers.
Adhering to a tight time schedule, these reviewers scrutinized the text,
providing countless suggestions for improving the accuracy and completeness of
the presentation. We sincerely appreciate the time these people took from
their busy professional schedules to help us ensure the quality, accuracy and
timeliness of this book.
Christopher Fry (Clear Methods)
Kyle Gabhart (Independent Consultant)
Ari Goldberg (Alphawolf)
Corinne A. Gregory (Speaker, Author, Consultant)
Mason Ham (Zambit Technologies, Inc.)
Michael Hudson (Blueprint Technologies, Inc.)
Anne Thomas Manes (Systinet)
Paul Monday (J. D. Edwards & Co.)
JP Morganthal (iKimbo)
John Mueller (Consultant)
Neal Patel (Microsoft Corporation)
Mike Plusch (Clear Methods)
Teri Radichel (Radical Software)
Sazi Temel (BEA)
Priscilla Walmsley (Consultant)
David Weller (Valtech Technologies, Inc.)
Justin Whitney (Author and Web Services Game Designer)
We would sincerely appreciate your comments, criticisms,
corrections and suggestions for improving the book. Please address all
We will respond promptly.
Well, that’s it for now. Welcome to the exciting world of
Web services. We hope you enjoy this presentation of business, technical and
programming topics as much as we enjoyed writing it.
Dr. Harvey M. Deitel
Paul J. Deitel
Lauren K. Trees
About the Authors
Dr. Harvey M. Deitel, Chairman
and Chief Strategy Officer of Deitel & Associates, Inc., has 41 years
experience in the computing field, including extensive industry and academic
experience. Dr. Deitel earned B.S. and M.S. degrees from the Massachusetts
Institute of Technology and a Ph.D. from Boston University. He worked on the
pioneering virtual-memory operating-systems projects at IBM and MIT that
developed techniques now widely implemented in systems such as Unix, Linux™
and Windows® XP. He has 20 years of college teaching experience,
including earning tenure and serving as the Chairman of the Computer Science
Department at Boston College before founding Deitel & Associates, Inc., with
his son, Paul J. Deitel. He is the author or co-author of several dozen books
and multimedia packages and is writing many more. With translations published
in Japanese, Russian, Spanish, Traditional Chinese, Simplified Chinese,
Korean, French, Polish, Italian, Portuguese and Greek, Dr. Deitel’s texts have
earned international recognition. Dr. Deitel has delivered professional
seminars to major corporations, government organizations and various branches
of the military.
Paul J. Deitel, CEO and Chief Technical Officer of
Deitel & Associates, Inc., is a graduate of the Massachusetts Institute of
Technology’s Sloan School of Management, where he studied Information
Technology. Through Deitel & Associates, Inc., he has delivered Java, C, C++
and Internet and World Wide Web programming courses to industry clients
including Compaq, Hewlett-Packard, Sun Microsystems, White Sands Missile
Range, Rogue Wave Software, Boeing, Dell, Stratus, Fidelity, Cambridge
Technology Partners, Open Environment Corporation, One Wave, Hyperion
Software, Lucent Technologies, Adra Systems, Entergy, CableData Systems, NASA
at the Kennedy Space Center, the National Severe Storms Laboratory, IBM and
many other organizations. He has lectured on C++ and Java for the Boston
Chapter of the Association for Computing Machinery and has taught
satellite-based Java courses through a cooperative venture of Deitel &
Associates, Inc., Prentice Hall and the Technology Education Network. He and
his father, Dr. Harvey M. Deitel, are the world’s best-selling programming
language textbook authors.
Lauren Trees is a graduate of Brown University with a
concentration in Literatures in English. Lauren participated in the
conceptualization of this book, performed much of the necessary research and
acted as the primary author of Chapters 1–4. She also served as project
manager and edited the entire manuscript for accuracy, clarity and
effectiveness of presentation. Over the past two years, Lauren has contributed
to numerous Deitel and Associates, Inc., publications, including e-Business
& e-Commerce for Managers, Wireless Internet & Mobile Business How to
Program and Visual Basic® .NET How to Program.
Betsy DuWaldt, Editorial Director of Deitel &
Associates, Inc., is a graduate of Metropolitan State College of Denver with a
major in Technical Communications (Technical Writing and Editing Emphasis).
She acted as primary author of Chapters 5, 6, 8 and Appendix D. Betsy has
contributed to numerous Deitel & Associates, Inc., publications, including
Wireless Internet & Mobile Business How to Program, C# How to Program
and Python How to Program.
About Deitel & Associates, Inc.
Deitel & Associates, Inc., is an internationally recognized
corporate instructor-led training and content-creation organization
specializing in Internet/World Wide Web software technology,
e-business/e-commerce software technology, object technology and computer
programming languages education. The company offers courses in Internet and
World Wide Web programming, wireless Internet programming, Web services (in
both Java and .NET languages), object technology, and major programming
languages and platforms, such as Visual Basic .NET, C#, Visual C++ .NET, Java,
Advanced Java, C, C++, XML, Perl, Python, ASP .NET, ADO .NET and more. Deitel
& Associates, Inc., was founded by Dr. Harvey M. Deitel and Paul J. Deitel,
the world’s leading programming-language textbook authors. The company’s
clients include many of the world’s largest companies and government agencies,
branches of the military and business organizations. Through its 25-year
publishing partnership with Prentice Hall, Deitel & Associates has published
leading-edge programming textbooks, professional books, interactive
CD-ROM-based multimedia Cyber Classrooms, Complete Training Courses,
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Deitel & Associates, Inc., holds a seat on the W3C Advisory
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Officer, Paul Deitel). Advisory Committee members help provide "strategic
direction" to the W3C through meetings held around the world.
Member organizations also help develop standards recommendations
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