--- a/classes/basecontroller.php	Tue Apr 21 16:41:36 2015 +0200
+++ b/classes/basecontroller.php	Thu Apr 23 14:58:27 2015 +0200
@@ -1,7 +1,30 @@
 <?php
+/* basecontroller.php
+ * This file is part of Extraction-interface.
+ *
+ * Extraction-interface is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Extraction-interface 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Extraction-interface.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 /** 
-* An instance of the BaseController class can't be created directly.
-* It can only be extended/inherited by other classes.
+ * A controller can send commands to the model to process or update the model's state. 
+ * It can also pass the commands or data (from model) to the associated view to change the view's presentation.
+ * 
+ * An instance of the BaseController class can't be created directly.
+ * It can only be extended/inherited by other classes. 
+ * For example in controllers/ folder, Extractapp is extended from the BaseController. 
+ * An instance of Extractapp can be created directly.
+ * 
 */
 
 abstract class BaseController {
@@ -23,7 +46,7 @@
 		/** 
 		* Return the corresponding view in the views folder. 
 		* We use the same class name as the folder's name and action name as the file's name in the folder hierarchy.
-		* In this design, we can require the corresponding views php code by defining controller and action in url.
+		* In this design, we can query the corresponding views php code by defining controller and action in url.
 		* 
 		* If you also require the maintemplate.php, which now only contains scripts that need to be inclued, set $fullview to be true; 
 		* otherwise, the maintemplate.php will not be applied.