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The main change consists in the automatic DB installation procedure. Now VB uses a framework for maintaining the DB and for automatically updating it together with each new release of the platform. Each time VB is started, it checks if wether the DB schema is up to date with its known most recent version. In affirmative case, VB starts, otherwise, it informs the user that the DB needs to be updated. The updates are organized in chunks of scripts, each representing a new change in the DB structure (mostly scheme changes, but also data which may affect the behaviour of the system).
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