*WML is combination of XML and HTML: WML should present data structure as well as event handling such as navigation over network. this combination is not a full support of both language, WML user should enduer less fancy support for text formatting. This is necessary to reduce communication overhead as well as lack of display capability of WAP-enable device. WML content developer should forget about various font (size change is possible), color, and HTML's text formatting tags, such as <blink>. Emphasis <em> emphasis <strong> strong emphasis <i> italic <b> bold font <u> underline <big> large font <small> font.


<p> support both default and optional line-wrappig (break line automatically to fit into dispaly) and alignment. but display constraint of WAP device make deck and card size limited to 


*limitation of input and output od palm and wireless phone


*talking about 
To incorporate features of HTML where they make sense (text formatting, links, images, etc.) 

Congruent with the capabilities and limitations of many handheld devices, HDML's focus goes beyond
presentation and layout. HDML provides an explicit navigation model which does not rely upon the visual context
required of HTML.


XML + XSL = HTML


One of the main differences between html and xml is that html has one defined
 tagging language, while XML is a meta-language where you can define your own tags. valid WML document must correspond to this DTD or it cannot be processed.


WMLScript
Java and WABA
JAVA K
ECMAScript.
JavaScript.


http://www.uidesign.net/2000/letters/wmlxmlfeedback.html
http://www.w3.org/Mobile/1998/Workshop/Papers/UP
http://www.w3.org/Submission/1997/5/
http://www.mobic.com/wap/service_development_using_wap.htm
http://www.wirelessdevnet.com/training/WAP/WML.html
http://www.wirelessdevnet.com/training/WAP/WMLScript.html