The Session Object
A Session object holds information about a session, or patient visit. Each Session object has an Actions property that references an Action collection containing information about all actions performed during the session. Only the current session (the session that reflects the current visit) can be empty; sessions belonging to a patient will always contain at least one action.
The Session object holds two properties: CreateDate, which is the date when the session was created, and Actions, which is a reference to an Actions collection that holds the actions of the session.