The only required table in the scenario database is the
scenario_information table (see Sec. 9.13.5).
This table points to a baseyear database, or
to another scenario database.
In addition, the scenario database may include any other tables for data that
is different in this scenario. For example, if the scenario is simulating a
large retail development in the suburbs, the development_events_exogenous table
would be included in the scenario database. In this way, a scenario database
may change any of the information contained in the baseyear.