Event types are XML schemas that define the structure of an event that components can publish or consume. An event type describes the event instances that a given input stream or output stream will carry.

An input stream identifies a stream of events from a specified topic on the event bus. An input stream has an associated event type that describes the structure of the events that the input stream carries. An input stream can carry only one type of event.

You create event types using the Event Type Editor. If you want to reuse an event type that has already been defined, you can add it to your project from the Event Type Store.

If your organization is using CentraSite for SOA governance, you can add event types to, and retrieve event types from the CentraSite registry. If your organization publishes its event types to CentraSite, you can search the CentraSite registry for the event type you need.