php-htmlpurifier/library/HTMLPurifier/HTMLModule/Target.php

<?php

require_once 'HTMLPurifier/AttrDef/HTML/FrameTarget.php';

/**
 * XHTML 1.1 Target Module, defines target attribute in link elements.
 */
class HTMLPurifier_HTMLModule_Target extends HTMLPurifier_HTMLModule
{
    
    public $name = 'Target';
    
    public function __construct() {
        $elements = array('a');
        foreach ($elements as $name) {
            $e =& $this->addBlankElement($name);
            $e->attr = array(
                'target' => new HTMLPurifier_AttrDef_HTML_FrameTarget()
            );
        }
    }
    
}