Wireless Markup Language (WML)

Wireless Markup Language (WML), based on XML, is a markup language intended for devices that implement the Wireless Application Protocol (WAP) specification, such as mobile phones.
Example of WML Code:

<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
   "http://www.wapforum.org/DTD/wml_1.1.xml" >
<wml>
  <card id="main" title="First Card">
    <p mode="wrap">This is a sample WML page.</p>
  </card>
</wml>

Opera supports WML natively. Mozilla based browsers (Mozilla Firefox, SeaMonkey, MicroB) can interpret WML by WMLBrowser add on.