diff --git a/TransportClient.markdown b/TransportClient.md
similarity index 86%
rename from TransportClient.markdown
rename to TransportClient.md
index 4a09cf4..8af4ab0 100644
--- a/TransportClient.markdown
+++ b/TransportClient.md
@@ -1,11 +1,11 @@
 TransportClient is a [BSP client](BSP) that synchronises transport properties between devices. Transport properties describe how to connect to a device over various transports.
 
-### Channel identifiers
+### Group identifiers
 
 TransportClient uses the following client identifer:   
 `673e a091 6735 61e2 8f70 122f 6a8e a8f4 97c3 624b 86fa 07f7 85bb 15f0 9fb8 7b4b`
 
-The client uses a single channel for all messages. The [channel descriptor](BSP#channel-identifiers) is an empty [BDF list](BDF).
+The client uses a single group for all messages. The [group descriptor](BSP#group-identifiers) is an empty [BDF list](BDF).
 
 ### Message types