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diff --git a/lib/Zend/Validate/Interface.php b/lib/Zend/Validate/Interface.php
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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_Validate
+ * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Interface.php 8064 2008-02-16 10:58:39Z thomas $
+ */
+
+
+/**
+ * @category   Zend
+ * @package    Zend_Validate
+ * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+interface Zend_Validate_Interface
+{
+    /**
+     * Returns true if and only if $value meets the validation requirements
+     *
+     * If $value fails validation, then this method returns false, and
+     * getMessages() will return an array of messages that explain why the
+     * validation failed.
+     *
+     * @param  mixed $value
+     * @return boolean
+     * @throws Zend_Valid_Exception If validation of $value is impossible
+     */
+    public function isValid($value);
+
+    /**
+     * Returns an array of messages that explain why the most recent isValid()
+     * call returned false. The array keys are validation failure message identifiers,
+     * and the array values are the corresponding human-readable message strings.
+     *
+     * If isValid() was never called or if the most recent isValid() call
+     * returned true, then this method returns an empty array.
+     *
+     * @return array
+     */
+    public function getMessages();
+
+    /**
+     * Returns an array of message codes that explain why a previous isValid() call
+     * returned false.
+     *
+     * If isValid() was never called or if the most recent isValid() call
+     * returned true, then this method returns an empty array.
+     *
+     * This is now the same as calling array_keys() on the return value from getMessages().
+     *
+     * @return array
+     * @deprecated Since 1.5.0
+     */
+    public function getErrors();
+
+}