Perusing the WML Language
On the surface, the WML language will look familiar to an HTML developer. To accommodate the constrained memory and uncertain connection characteristics of WAP phones, WML reflects a “deck of cards” metaphor. The deck is the entire markup page, containing a collection of cards. Individual <card> elements represent the portion of the larger deck that is currently displayed. A card is rendered when it is called upon by an internal event, an anchor using href attributes, a “relative” movement directive that moves through a page history stack, or a WMLscript command.
This strategy saves on the use of an already constrained bandwidth by pre-loading many of the pages (or cards) that will be displayed in a multi-card navigation. ...
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