We'll add a new structure to the userLogout and userHibernate of "context" containing a parameter resource. Support of this feature is encouraged for senders, but not required. That resource will contain –  We'll define a valueset of reasons for logout and hibernate that the sender of the event can populate to interoperably communicate the initiator of the event. Currently the content of the valueset is: user-initiated, system-initiated.  Also, we'll update the definition of userHibernate to explicitly state that it can be the result of: a "session time-out or other reason"