diff --git a/models.py b/models.py
index 470e0f9..07e8178 100644
--- a/models.py
+++ b/models.py
@@ -17,7 +17,9 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
-    Data model and low level protocol
+    Data model and low level protocol.
+
+    The low level protocol currently supported is the 5AA protocol from STID.
 '''