File Source for IComparable.php

<?php
/**
* PHPPowerPoint
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* @category PHPPowerPoint
* @package PHPPowerPoint
* @copyright Copyright (c) 2009 - 2010 PHPPowerPoint (http://www.codeplex.com/PHPPowerPoint)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version 0.1.0, 2009-04-27
*/
/**
* PHPPowerPoint_IComparable
*
* @category PHPPowerPoint
* @package PHPPowerPoint
* @copyright Copyright (c) 2009 - 2010 PHPPowerPoint (http://www.codeplex.com/PHPPowerPoint)
*/
interface PHPPowerPoint_IComparable
{
/**
* Get hash code
*
* @return string Hash code
*/
public function getHashCode();
/**
* Get hash index
*
* Note that this index may vary during script execution! Only reliable moment is
* while doing a write of a workbook and when changes are not allowed.
*
* @return string Hash index
*/
public function getHashIndex();
/**
* Set hash index
*
* Note that this index may vary during script execution! Only reliable moment is
* while doing a write of a workbook and when changes are not allowed.
*
* @param string $value Hash index
*/
public function setHashIndex($value);
}

Source for file IComparable.php