Add new section 5.3.6

terms tailored for a specific dissemination channel or display medium (i.e. “congestion ahead”).

Channel based terms are often tailored and leave out details. For example, an electronic road sign that says “congestion ahead” assumes the audience understands the context of viewing the message while driving. Such messages are actually private messages, built for a specific channel; the information is still public, only the tailoring is private. Without the context of the display medium, the event type becomes vague and difficult for comparison activities.