diff --git a/MessagingClient.markdown b/MessagingClient.markdown
index 744ea8e..dd69a7f 100644
--- a/MessagingClient.markdown
+++ b/MessagingClient.markdown
@@ -5,11 +5,11 @@ MessagingClient is a [BSP client](BSP) that synchronises private messages betwee
 MessagingClient uses the following client identifier:   
 `6bcd c006 c091 0b0f 44e4 0644 c3b3 1f1a 8bf9 a6d6 021d 40d2 19c8 6b73 1b90 3070`
 
-The client uses a single channel for all messages. The [client data structure](BSP#channel-identifiers) for the channel is a [BDF list](BDF) with a single element: "PRIVATE_MESSAGE" (string).
+The client uses a single channel for all messages. The [channel descriptor](BSP#channel-identifiers) is an empty [BDF list](BDF).
 
 ### Message types
 
-**0: PRIVATE_MESSAGE** - The content is a [BDF](BDF) list with two elements: `body` (string) and `attachments` (dictionary, may be null). Each key in `attachments` is the name of an attachment, and the value is a list with two elements: `mime_type` (string) and `message_id` (raw).
+**0: PRIVATE_MESSAGE** - The content is a BDF list with two elements: `body` (string) and `attachments` (dictionary or null). Each key in `attachments` is the name of an attachment, and the value is a list with two elements: `mime_type` (string) and `message_id` (raw).
 
 **1: ATTACHMENT** - The content is raw data.