WS-EventNotification is supposed to be a
convergence of the separate WS-Eventing and WS-Notification specifications. As WS-EventNotification layers on and composes with WS-Eventing, WS-Eventing is usually implemented first.
WS-Eventing is implemented in the
WiseMan project,
JBossWS, and
Apache Savan/Java.
Fusion: Eventing with SOA - Introduction
Eventing with SOA Part 2 - Eventing using Synapse and WSO2 ESB