IBM® WebSphere® Presence Server Component supports PUBLISH and SUBSCRIBE requests. To reduce network traffic, you can configure Presence Server to support partial PUBLISH flows and partial notifications resulting from SUBSCRIBE requests.
PUBLISH is a client-generated request to create, modify, and remove an event state associated with the address of record (AOR). The event state is carried in the body of the PUBLISH request and maintained by Presence Server as a presence document using the following process.
SUBSCRIBE is a client-generated request for a current state and state updates from a remote node. Presence Server uses the following process for SUBSCRIBE requests:
You can configure Presence Server for partial publications and notifications, which can improve system throughput by reducing the amount of data that is transported over the network. A partial publication or notification sends only those parts of presence documents that have changed, rather than sending the entire documents.