Section A.1.2 "Bindings for EventDescriptions" contains the following paragraph:

"For any Notification Format it SHOULD be possible to determine how a given wse:eventType will appear on the wire as a notification in a subscription created with that format. The following sections define how wse:eventTypes bind to notifications for the two Notification Formats defined in this specification; Unwrapped and Wrapped. Specifications or profiles that define additional Notification Formats SHOULD define how wse:eventTypes bind to the notifications for those formats. In the absence of a mapping for a particular Notification Format, implementations MAY provide a Notification WSDL (see below) that explicitly describes the notification operations."

This allows for the possibility of Notification Formats for which there is no well defined mapping from a wse:eventType to the on-the-wire notification. This completely undoes the entire purpose of EventDescriptions, which is to enable the event sink to determine how notifications will appear.

Proposal: s/SHOULD/MUST/ in the above paragraph