||Application has to have exactly one open session. Information about current session are in SessionInfo object (Id, name, ...). This information is the same as information in database (table wrk_session).
On initial, there is empty session (without versions).
- create new session
- open existing session
- close current session.
Anytime, if some session is opened and contains at least one version, all three operations cause close current session. For mor detail see Close current session.