diff --git a/TransportApp.markdown b/TransportApp.markdown
index 0004040..d259c39 100644
--- a/TransportApp.markdown
+++ b/TransportApp.markdown
@@ -4,7 +4,7 @@ TransportApp is an application layer protocol that uses [BSP] to synchronise inf
 
 TransportApp uses a single message type:
 
-**0: PROPERTIES** - The content consists of a [BDF] list. The first element of the list is a string identifying the transport. The second element is an integer that is incremented whenever the transport properties change. The third element is a dictionary containing the transport properties.
+**0: PROPERTIES** - The content consists of a [BDF] list. The first element (string) is the transport identifier. The second element (int) is a version number, which is incremented whenever the transport properties change. The third element (dictionary) contains the transport properties.
 
 The following transports have been defined: