diff -r 7051e55a3131 -r 985f1992895d Model/TagInterface.php
--- a/Model/TagInterface.php	Thu Oct 27 21:26:30 2011 +0200
+++ b/Model/TagInterface.php	Thu Oct 27 21:37:34 2011 +0200
@@ -11,6 +11,8 @@
 namespace IRI\Bundle\WikiTagBundle\Model;
 
 
+use Doctrine\Common\Collections\ArrayCollection;
+
 interface TagInterface {
     
     /**
@@ -169,5 +171,18 @@
      */
     function getCategory();
     
+    /**
+     * Get Documents
+     *
+     * @return ArrayCollection
+     */
+    function getDocuments();
+    
+    /**
+     * Nullify category
+     *
+     */
+    function nullCategory();
+    
     
 }
\ No newline at end of file