Index: branches/RC/core/kernel/constants.php
===================================================================
diff -u -N -r10857 -r10887
--- branches/RC/core/kernel/constants.php	(.../constants.php)	(revision 10857)
+++ branches/RC/core/kernel/constants.php	(.../constants.php)	(revision 10887)
@@ -82,5 +82,26 @@
 	define('EDITING_MODE_CMS', 1);
 	define('EDITING_MODE_LAYOUT', 2);
 	define('EDITING_MODE_DESIGN', 3);
+	
+	// agent types
+	define('AGENT_TYPE_USER', 1);
+	define('AGENT_TYPE_SYSTEM', 2);
 
+	// agent last run statuses
+	define('AGENT_LAST_RUN_SUCCEDED', 1);
+	define('AGENT_LAST_RUN_FAILED', 0);
+	define('AGENT_LAST_RUN_RUNNING', 2);
+	
+	// link validation constants
+	define('LINK_VALIDATION_NOT_VALIDATED', 0);
+	define('LINK_VALIDATION_VALID', 1);
+	define('LINK_VALIDATION_INVALID', 2);
+
+	/**
+	 * Validate this much links on each progress bar step
+	 *
+	 */
+	define('LINK_VALIDATION_PER_PAGE', 5); // in links
+	define('LINK_VALIDATION_TIMEOUT', 10); // in seconds
+
 ?>
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