diff --git a/authzgroups.php b/authzgroups.php
index 5732223..d5460ba 100644
--- a/authzgroups.php
+++ b/authzgroups.php
@@ -120,6 +120,87 @@ class authzgroups
     return $ressource[$object];
   }
 
+  /** Return TRUE if the user right allow to see the object 
+      Return a 403 Exception if the user don't have the right
+      Return a 401 Exception if the user is not connected */
+  public function accessRight ($module, $user, $object)
+  {
+    if ($this->dbObject === null)
+      throw new Exception ("Can't use authzgroups\\accessRight without ".
+                           "connected database", 500);
+    if ($module === null || ! is_string ($module) || trim ($module) === "")
+      throw new Exception ("Module not provided to authzgroups\\accessRight",
+                           500);
+    if ($user === null || ! is_string ($user) || trim ($user) === "")
+      throw new Exception ("User not provided to authzgroups\\accessright",
+                           500);
+    if ($object === null || ! is_string ($object))
+      throw new Exception ("Object not provided to authzgroups\\accessRight",
+                           500);
+    $rc = $this->allow ($module, $user, "/$object");
+    trigger_error ("authzgroups : accessRight ('$module','$user','/$object')".
+                   "=$rc", E_USER_NOTICE);
+    if ($rc !== "NO")
+      return TRUE;
+    if ($user === "anonymous")
+        throw new Exception (_("Anonymous not allowed"), 401);
+    throw new Exception (_("Access forbidden"), 403);
+  }
+
+  /** Return TRUE if the user right allow to edit the object 
+      Return a 403 Exception if the user don't have the right
+      Return a 401 Exception if the user is not connected */
+  public function accessWrite ($module, $user, $object)
+  {
+    if ($this->dbObject === null)
+      throw new Exception ("Can't use authzgroups\\accessWrite without ".
+                           "connected database", 500);
+    if ($module === null || ! is_string ($module) || trim ($module) === "")
+      throw new Exception ("Module not provided to authzgroups\\accessWrite",
+                           500);
+    if ($user === null || ! is_string ($user) || trim ($user) === "")
+      throw new Exception ("User not provided to authzgroups\\accessWrite",
+                           500);
+    if ($object === null || ! is_string ($object))
+      throw new Exception ("Object not provided to authzgroups\\accessWrite",
+                           500);
+    $rc = $this->allow ($module, $user, "/$object");
+    trigger_error ("authzgroups : accessWrite ('$module','$user','/$object')".
+                   "=$rc", E_USER_NOTICE);
+    if ($rc === "RW")
+      return TRUE;
+    if ($user === "anonymous")
+        throw new Exception (_("Anonymous not allowed"), 401);
+    throw new Exception (_("Modification forbidden"), 403);
+  }
+
+  /** Return TRUE if the user right allow to see but without modification
+      the object 
+      Return a 403 Exception if the user don't have the right
+      Return a 401 Exception if the user is not connected */
+  public function accessReadOnly ($module, $user, $object)
+  {
+    if ($this->dbObject === null)
+      throw new Exception ("Can't use authzgroups\\accessReadOnly without ".
+                           "connected database", 500);
+    if ($module === null || ! is_string ($module) || trim ($module) === "")
+      throw new Exception ("Module not provided to authzgroups\\accessReadOnly",
+                           500);
+    if ($user === null || ! is_string ($user) || trim ($user) === "")
+      throw new Exception ("User not provided to authzgroups\\accessReadOnly",
+                           500);
+    if ($object === null || ! is_string ($object))
+      throw new Exception ("Object not provided to authzgroups\\accessReadOnly",
+                           500);
+    $rc = $this->allow ($module, $user, "/$object");
+    trigger_error ("authzgroups : accessReadOnly ('$module','$user','/$object')"
+                   ."=$rc", E_USER_NOTICE);
+    if ($rc === "RO")
+      return TRUE;
+    if ($user === "anonymous")
+        throw new Exception (_("Anonymous not allowed"), 401);
+    throw new Exception (_("Access forbidden"), 403);
+  }
   /////////////////////////
   //  DATABASE STORAGE   //
   /////////////////////////