gistfile1.txt

Carbon Fields use Underscore template engine. Each field has a `template` method that prints the underscore template code.

```
class Carbon_Field_Example extends Carbon_Field {
	// Base template
	function template() {
		?>
		<input id="{{{ id }}}" type="text" name="{{{ name }}}" value="{{ value }}" class="regular-text example-field" />
		<span>This is an example field. </span>
		<?php
	}
}
```

Some fields have more than one template - in those cases the extra templates should be printed in separate methods and registered via `add_template($name, $callback)` method. 

```
class Carbon_Field_File extends Carbon_Field {
	function init() {
		// Add the file description template to  the templates stack
		$this->add_template($this->get_type() . '-Description', 'template_description');
	}
	...
	// File description template
	function template_description() {
		?>
		<div class="carbon-description {{{ value ? '' : 'hidden' }}}">
			<a href="{{ value }}" target="_blank" class="carbon-view_file">View File</a>
		</div>
		<?php
	}
}
```