IBM® XDMS supports two types of Session Initiation Protocol (SIP) subscriptions.
The IBM XDMS supports subscriptions using UA-profile or xcap-diff events. While both are supported, xcap-diff events have several advantages over UA-profile events. Both UA-profile and xcap-diff events support change notification, with some differences.
The IBM XDMS supports UA-profile events as defined in the OMA-TS-XDM_Core-V1_0_1 specification, which can be used to subscribe to XDMS documents/directories.