Page 154 - DCAP512_WAP_AND_WML

WAP & WML

Notes WML Script resides within the high-level applications layer of the WAP structure and adds
capabilities for swifter, more advanced and interactive logical operations between the mobile
device and server.

!
Caution WML Script code can be written in normal text files.

11.1.1 The Rules of WML Scripts

What is Scripting?

Scripting adds “behavioral” capabilities to the device to enhance application performances and
the user experience.
Scripting adds capabilities like the following:

 Validating user input
 Accessing device capabilities and processing alerts
 Enabling device extensions.

Scripting enables local processing on the device and eliminates needless “roundtrip” messages
over the air link to the server, and thus

 Speeds up the user experience
 Reduces connection time costs
 Enables faster information input and display

WMLScript Basics

WML Script is

 Inherited from JavaScript 1.1 and ECMA Script
 Modeled for limited capacity devices

 Procedural rather than object oriented
 Uses 32 bit integer
 Is referenced from WML, not contained within it

 Is compiled to binary to run on WAP devices (compiling is handled by the gateway
server)

Script Syntax Rules

WML Script follows these syntax rules.
 Script is case sensitive

 White space is ignored
 Blocks are enclosed in brackets “{}”.

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