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                                Timeout => <seconds>,
                                                 }

=head1 DESCRIPTION

This session module is based on Apache::Session, but it persues a
different notion of a session, so you probably have to adjust your
expectations a little.

The dialog that is implemented within an HTTP based application is a
nonlinear chain of events. The user can decide to use the back button
at any time without informing the application about it. A proper
session management must be prepared for this and must maintain the
state of every single event. For handling the notion of a session and
the notion of a registered user, the application has to differentiate
carefully between global state of user data and a user's session
related state. Some data may expire after a day, others may be
regarded as unexpirable. This module is solely responsible for
handling session related data. Saving unexpirable user related data
must be handled by the calling application.