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WAP - Wireless Application Protocol
WAP (Wireless Application Protocol) is a protocol that allows wireless devices access to information and services over the Internet. WAP makes it possible to deliver Web content through a WAP gateway server directly to a wireless Web-enabled device. By using already existing Internet technology such as XML and IP, WAP allows access to Internet content and services to wireless clients. With WAP, clients can obtain Internet content and services through devices such as, mobile phones, PDAs, pagers, two-way radios, smart phones, communicators, and terminals. The protocol is developed by WAP Forum, an organization of some of the most powerful Internet and telecom companies.

Configuration
It is quite easy to enable a Virtual Private Server web server to serve WAP documents. The gateway is usually on the cellular network, so all your Apache Web Server needs are the correct MIME Types.

  1. Connect to your Virtual Private Server via Telnet or SSH and use an online editor, like pico, to open your web server configuration file (~/www/conf/httpd.conf). Or, download your web server configuration file via FTP, making sure to download (and upload) in ASCII format. Then make the following additions to the configuration file.

    AddType text/vnd.wap.wml               .wml
AddType image/vnd.wap.wbmp             .wbmp
AddType application/vnd.wap.wmlc       .wmlc
AddType text/vnd.wap.wmlscript         .wmls
AddType application/vnd.wap.wmlscriptc .wmlsc

  2. You might also want to add index.wml to the DirectoryIndex directive, like this:

    DirectoryIndex index.wml index.html

Testing
Create a ~/www/htdocs/hello.wml test file to verify that you've set things up right. The following sample code shows how to create two sample cards using Wireless Markup Language (.wml)

<?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="card1" title="My Wap Page"> 
<p>Hello world - this is my first wap card!</p> 
<p><a href="#card2">Go to the second card</a></p> 
</card> 
<card id="card2" title="Second Card"> 
<p>This is my second wap card!</p> 
<p><a href="#card1">Go back to the first card</a></p> 
</card> 
</wml>

When you develop WML pages, you should always check the page in one of the SDKs available.

In order to view your new WAP document, you need a WAP-enabled cell phone or a WAP emulator. There are many WAP emulators available, including these:

More Information
For more information and resources see the following.