Database systems have been designed to manage business critical information and make this information accessible on request to connected clients. There is, however, an ever-increasing need to share relevant information actively with disconnected clients and/or external systems, e.g., to propagate and/or automatically react to relevant information as soon as it becomes available.
Leveraging the existing database infrastructure, Oracle created a solution to this problem. The solution is state of the art in terms of functionality and operational characteristics. This Oracle technology is widely used and supports many highly visible applications.