Microsoft, BEA and TIBCO have published Web Services Eventing (WS-Eventing) (what kind of word is “Eventing”? Oh, well):

This specification defines a protocol for one Web service (called an “event sink”) to register interest (called a “subscription”) with another Web service (called an “event source”) in receiving messages about events (called “notifications”).

The CORBA Notification Service gets reborn …