operations list of a concrete NS

Change-Id: I053371f6e769f4a965aaf99fdabde38b42485b31
Signed-off-by: lombardof <flombardo@cnit.it>
diff --git a/sf_t3d/settings.py b/sf_t3d/settings.py
index cfd7a3e..619f4a2 100644
--- a/sf_t3d/settings.py
+++ b/sf_t3d/settings.py
@@ -92,7 +92,7 @@
             ],
             'libraries':{
                 'get': 'sf_t3d.templatetags.get',
-
+                'date_tag': 'sf_t3d.templatetags.datetag',
             }
         },
     },