Page 59 - DCAP512_WAP_AND_WML

Unit 5: Understanding WAP in WML

Notes

Notes Several other companies were soon on Ericcson’s heels, developing various other
technologies to compete in this soon-to-explode market, two major players including
Nokia (http://www.nokia.com) and Phone.com, formally known as Unwired Planet
(http://www.phone.com).

5.1 WML Decks and Cards

WML pages are called DECKS. They are constructed as a set of CARDS, related to each other with
links. When a WML page is accessed from a mobile phone, all the cards in the page are
downloaded from the WAP server. Navigation between the cards is done by the phone computer
- inside the phone - without any extra access trips to the server.
WML Programming Model

The WML programming model offers for
 Application navigation (cards and decks)
 User interaction, events

 Definition of tasks, work to be performed
Writing WML Code and Data Formatting
<?xml version=”1.0"?><!DOCTYPE wml PUBLIC “-//WAPFORUM//DTD WML 1.1//EN””http:/
/www.wapforum.org/DTD/wml_1.1.xml”><wml><card id=”HTML” title=”HTML
Tutorial”><p>Our HTML Tutorial is an award winning tutorial from W3Schools.</p></
card><card id=”XML” title=”XML Tutorial”><p>Our XML Tutorial is an award winning tutorial
from W3Schools.</p></card></wml>
As it can be seen from the example, the WML document is an XML document. The DOCTYPE is
defined to be wml, and the DTD is accessed at www.wapforum.org/DTD/wml_1.1.xml.
The document content is inside the <wml>...</wml> tags. Each card in the document is inside
<card>...</card> tags, and actual paragraphs are inside <p>...</p> tags. Each card element has
an id and a title.

Task Try to explain the code which is written above for data formatting.

Self Assessment

Fill in the blanks:
1. WML pages are called ……………........
2. ……………........ between the cards is done by the phone computer — inside the phone —
without any extra access trips to the server.
3. The document content is inside the ……………........ tags.

5.2 Creating First Card

The whole WML-page is called a Deck and it consists of one or more cards. Each card contains the
information that is displayed on the cellular devices in one screen. So in one Deck you can define

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