6 There are three kinds of sessions.

     7 

     8 * user sessions are the most common: they are related to users and

     9   carry security checks coming with user credentials

    10 

    11 * super sessions are children of ordinary user sessions and allow to

    12   bypass security checks (they are created by calling unsafe_execute

    13   on a user session); this is often convenient in hooks which may

    14   touch data that is not directly updatable by users

    15 

    16 * internal sessions have all the powers; they are also used in only a

    17   few situations where you don't already have an adequate session at

    18   hand, like: user authentication, data synchronisation in

    19   multi-source contexts

    20 

    21 Do not confuse the session type with their connection mode, for

    22 instance : 'in memory' or 'pyro'.

    23