Mobile Markup
Mobile devices face several constraints compared to personal computers. These constraints include
Small display and limited user input facilities
Narrow band network connection
Limited memory and computational resources
Mobile device manufacturers, therefore, considered it neither practical—nor particularly useful, in most cases—to implement a full version of HTML. Many of the features, such as frames and tables, are not viewable on the small screens of most mobile devices, so markup languages were developed that were limited to the capabilities of most mobile devices.
Four different types of markup are currently being used on different devices. The following sections offer brief descriptions of what they are.
WML
Wireless Markup ...
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