WAP
November 28th, 2007
WAP stands for Wireless Application Protocol. WAP is an open, global specification that empowers mobile users with wireless devices to easily access and interact with information and services instantly. The WAP standard is based on the Internet standards (HTML, XML and TCP/IP). There is a WML language specification, a WMLScript specification, and a Wireless Telephony Application Interface (WTAI) specification. WML is a Wireless Markup Language – it is created from HTML, but is based on XML. WML is used to create pages that can be displayed in a WAP browser. Pages in WML are called DECKS. Decks are constructed as a set of CARDS. An example of WML code is below — see how it combines HTML in an XML format. <?xml version="1.0"?> <wml> <card id="card1" title="This is WML"> <p>Hello World</p> </card> <card id="card2" title="This is WML"> <p>This is how you stack cards</p> </card> </wml>WML Script is used at the client (the cellphone) to validate user input, generate dialog boxes, and perform many other client side services on a WAP browser. It is very similar to JavaScript used in many web pages today. WTAI is basically a protocol that converts information from a WAP browser into strings that provides instructions for events using the phone – e.g. making a call, looking up a number in the phone directory.
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