The constructor of the storage class takes 3 parameters: a path to the database file to operate on, the name of the object set (the prefix to use for all table names used in the object set), and a boolean specifying whether to reset the object set's contents. See "SQL table names" for information on what the prefix parameters does.

Resetting the object set occurs when an attempt is made to store objects into an object set that already exists. If the reset parameter is true, then the old object set is first deleted before any new objects are stored in it.