3.2.1.3.4 Queue of Outgoing Messages

The server MUST maintain a first in, first out (FIFO) queue of messages (see section 2.2.1) ready to be sent to the particular pipeline on the client. The element at the beginning of the queue can be a whole message or a suffix of a message (when the prefix has already been fragmented and sent to the client); all other elements of the queue are whole messages. See section 3.2.5.1.1for details on how the queue is used.

The queue is initialized to be empty.