Understanding WAP Wireless Applications, Devices, and Services phần 2 potx

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Forum strengthen relations with organizations with which it already has an established liaison (e.g., W3C, ETSI, IETF,

TIA, ECMA, etc.) as well as continue to meet with other relevant organizations.

1.8 Conclusions

WAP enables network operators and content providers to reach a mass market. Although WAP-enabled phones are just

in the process of being launched, there are today approximately 200 million GSM subscribers using wireless devices.

Looking less than five years ahead, forecasts by major handset manufacturers predict this figure will probably rise to 700

or 800 million, and we have good reason to believe that the majority of handsets in use will support WAP. Without a

doubt, WAP will add a new dimension to the use of mobile phones.

References

[1] vCard— The Electronic Business Card, Version 2.1, The Internet Mail Consortium (IMC), Sept. 18, 1996,

http://www.imc.org/pdi/vcard-21.doc.

[2] vCalendar— The Electronic Calendaring and Scheduling Format, Version 1.0, The Internet Mail Consortium (IMC),

Sept. 18, 1996, http://www.imc. org/pdi/vcal-10.doc.

[3] St. Laurent, S., and E. Cerami, Building XML Applications, New York: McGraw-Hill, 1999.

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The Wireless Application Environment for Creating WAP Services

and Applications

Marcel van der Heijden and Martin Frost

2.1 Introduction

In recent years, we have witnessed the incredible growth of the Internet: By now, almost all sources of information and

many applications and services are available through this medium. Moreover, a whole new industry has arisen that offers

networked applications and services that differ radically from traditional business models.

CHAPTER

2

Contents

2.1 Introduction

2.2 The wireless

markup language

2.3 Wireless

markup language

script

2.4 Byte￾encoded WML

and compiled

WMLScript

2.5 Overview of

the wireless

telephony

application

interface

2.6 Migrating

from WWW to

WAP

2.7 Markup

languages and

XML

2.8 User agent

capabilities and

content

negotiation

2.9 Miscellaneous

elements of WAP

of interest to

developers

2.10 Available

software tools

2.11 WML

language

reference