diff --git a/src/doc/crawler.rst b/src/doc/crawler.rst
index c52bbf2fe9b9f5fd77805e45ec85d195f5aa95f3..4b99c97e6db16e5691f373fa5fb4903e4d078155 100644
--- a/src/doc/crawler.rst
+++ b/src/doc/crawler.rst
@@ -131,6 +131,10 @@ The behavior and rules of the crawler are defined in logical units
 called CFoods. In order to extend the crawler you need to extend an
 existing CFood or create new one.
 
+.. Note:: A crawler always needs a corresponding data model to exits in the 
+          server. The following does not cover this aspect. Please refer  
+          for example to documentation of the YAML Interface.
+
 .. _c-food-introduction:
 
 CFood -- Introduction