<?php
/**
 * Markup dereferer
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package wb
 * @subpackage Markup
 */

/**
 * Markup dereferer
 *
 * Find list of references stored in XML node. This class implements the dummy-default
 * function: getReferences() that simply returns an empty list.
 *
 * @version 0.2.0
 * @package wb
 * @subpackage Markup
 */
class WBMarkup_Dereferencer extends WBStdClass
{
    /**
     * Get References
     *
     * Scan for refering ids and return list of them. The default
     * implementation returns an empty list of ids. Actual dereferencer
     * are meant to do something more intelligent here.
     *
     * List is somewhat nested: ns -> tag -> ids. Example:
     *
     * $refs = array(
     *                   'wb' => array(
     *                         'url'   =>  array(
     *                                           12,
     *                                           17,
     *                                           42
     *                                       ),
     *                         'vfsfile'   =>  array(
     *                                           1001
     *                                       )
     *                          )
     *              );
     *
     * @param array $node to be modified document node
     * @return array
     */
    public function getReferences($node)
    {
        return array();
    }
}