diff --git a/Node-documentation-guide.md b/Node-documentation-guide.md
index e70e5d9..db19821 100644
--- a/Node-documentation-guide.md
+++ b/Node-documentation-guide.md
@@ -15,6 +15,9 @@ After the short description the documentation should give a fuller description o
 ###Configuration  
 All configuration parameters should be described fully, including any incoming msg properties that override the default configuration.  
 
+###Input  
+Document all incoming properties that the node will use (but not already covered in the Configuration section)  
+
 ###Output  
 Document all outgoing properties that are set or modified by the node.