diff --git a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/INetworkGraphListener.java b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/INetworkGraphListener.java
index dfdba42..b69cd80 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/INetworkGraphListener.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/INetworkGraphListener.java
@@ -10,6 +10,20 @@
     /**
      * Network Graph events.
      *
+     * The recommended ordering rules for applying/processing the events is:
+     *    (a) Process "added" events before "removed" events.
+     *    (b) The ordering of the "added" events should be:
+     *          addedSwitchEvents, addedPortEvents, addedLinkEvents,
+     *          addedDeviceEvents
+     *        The above ordering guarantees that adding a port for example
+     *        will be processed after the corresponding switch itself is added.
+     *    (c) The ordering of the "removed" events should be:
+     *          removedDeviceEvents, removedLinkEvents, removedPortEvents,
+     *          removedSwitchEvents
+     *      The above ordering guarantees that removing a port for example
+     *      will be processed before the corresponding switch itself is
+     *      removed.
+     *
      * @param addedSwitchEvents the Added Switch Events.
      * @param removedSwitchEvents the Removed Switch Events.
      * @param addedPortEvents the Added Port Events.