From http://www.w3schools.com (Copyright Refsnes Data)

WML <template> tag

The <template> tag defines a template for all the cards in a deck. The "code" in the <template> tag is added to each card in the deck.

Note: You can specify only one <template> tag for each deck.

Note: This tag can only contain <do> and <onevent> tags.

Syntax

<template>
..<do>..
..<onevent>..
</template>

Attribute	Value	Description
onenterbackward	url	Occurs when the user navigates into a card using a "prev" task
onenterforward	url	Occurs when the user navigates into a card using a "go" task
ontimer	url	Occurs when the "timer" expires
class	cdata	Sets a class name for the element. The class name is case sensitive. An element can be connected to multiple classes. Multiple class names within the class attribute are separated by white space
id	id	Sets a unique name for the element

The example below uses the <do> tag to add a "back" link to each card:

<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
"http://www.wapforum.org/DTD/wml_1.1.xml">

<wml>
<template>
 <do type="prev" label="Back">
  <prev/>
 </do>
</template>

<card id="card1" title="Card 1">
<p>
 <a href="#card2">Go to Card 2</a>
</p>
</card>

<card id="card2" title="Card 2">
<p>
 <a href="#card3">Go to Card 3</a>
</p>
</card>

<card id="card3" title="Card 3">
<p>
 Hello World!
</p>
</card>
</wml>