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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Feed_Reader
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @category   Zend
  * @package    Zend_Feed_Reader
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 interface Zend_Feed_Reader_FeedInterface extends Iterator, Countable
 {
     /**
      * Get a single author
      *
      * @param  int $index
      * @return string|null
      */
     public function getAuthor($index = 0);
 
     /**
      * Get an array with feed authors
      *
      * @return array
      */
     public function getAuthors();
 
     /**
      * Get the copyright entry
      *
      * @return string|null
      */
     public function getCopyright();
 
     /**
      * Get the feed creation date
      *
      * @return string|null
      */
     public function getDateCreated();
 
     /**
      * Get the feed modification date
      *
      * @return string|null
      */
     public function getDateModified();
 
     /**
      * Get the feed description
      *
      * @return string|null
      */
     public function getDescription();
 
     /**
      * Get the feed generator entry
      *
      * @return string|null
      */
     public function getGenerator();
 
     /**
      * Get the feed ID
      *
      * @return string|null
      */
     public function getId();
 
     /**
      * Get the feed language
      *
      * @return string|null
      */
     public function getLanguage();
 
     /**
      * Get a link to the HTML source
      *
      * @return string|null
      */
     public function getLink();
 
     /**
      * Get a link to the XML feed
      *
      * @return string|null
      */
     public function getFeedLink();
 
     /**
      * Get the feed title
      *
      * @return string|null
      */
     public function getTitle();
 
     /**
      * Get all categories
      *
      * @return Zend_Feed_Reader_Collection_Category
      */
     public function getCategories();
 
 }