diff --git a/components/i_feed/daf.py b/components/i_feed/daf.py
index e04ecc5..2c43a2b 100644
--- a/components/i_feed/daf.py
+++ b/components/i_feed/daf.py
@@ -5,6 +5,10 @@ import geopy.distance
 
 @dataclass
 class DAF:
+    """
+    "Datenaufzeichnung für automatisiertes Fahren" (DAF), see 2021_DSE_Exercise_V1.0_Final.pdf page 7
+    """
+
     vehicle_identification_number: str
     gps_location: geopy.Point
     velocity: float