diff --git a/Example03_ATMWithdrawal_BehaviorOfEnvironment.mp b/Example03_ATMWithdrawal_BehaviorOfEnvironment.mp
index ac7002fa83a6aea2f39bc946abd7ffc38563c9a3..074b81cd5cd2d711760e8d93a860115692c66d1d 100644
--- a/Example03_ATMWithdrawal_BehaviorOfEnvironment.mp
+++ b/Example03_ATMWithdrawal_BehaviorOfEnvironment.mp
@@ -2,6 +2,8 @@
 See also: Example 4: Withdraw money from ATM model from the Monterey Phoenix System and 
 Software Architecture and Workflow Modeling Language Manual
 
+Purpose: Demonstrate use of COORDINATE logic and ROOT from another event.
+
 Integrated system and environment behaviors
 	
 MP separates models of component behaviors and component interactions