A task specifies what action to perform when an event, like entering a card or selecting a link, occurs.
Go Task
The <go> task represents the action of switching to a new card.
<?xml version="1.0"?><!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN""http://www.wapforum.org/DTD/wml_1.1.xml"><wml><card><p> <anchor> Go To Test <go href="test.wml"/> </anchor></p></card> </wml>
Prev Task
The <prev> task represents the action of going back to the previous card.
<?xml version="1.0"?><!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN""http://www.wapforum.org/DTD/wml_1.1.xml"><wml><card><p> <anchor> Previous Page <prev/> </anchor></p></card> </wml>
Noop Task
The <noop> task says that nothing should be done (noop stands for "no operation"). This tag is used to override deck-level elements.
The <do> tag can be used to activate a task when the user clicks on a word/phrase on the screen.
The example below uses a <do> tag to add a "Back" link to the card. When the user clicks on the "Back" link, he or she should be taken back to the previous card. But the <noop> tag prevents this operation; when the user clicks on the "Back" link nothing will happen: <?xml version="1.0"?><!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN""http://www.wapforum.org/DTD/wml_1.1.xml"><wml><card><p> <do name="back" type="prev" label="Back"> <noop/> </do></p></card> </wml>
Task Elements
Start tag Purpose WML
<go> Represents the action of switching to a new card 1.1
<noop> Says that nothing should be done (noop stands for "no operation"). Used to override deck-level elements 1.1
<prev> Represents the action of going back to the previous card 1.1
<refresh> Refreshes some specified card variables. If any of the variables are shown on the screen, this task also refreshes the screen 1.1