Dobbin is an object database implemented on top of SQLAlchemy. It's designed to mimick the behavior of the Zope object database (ZODB) while providing greater flexibility and control of the storage. It supports strong typing with native SQL columns by utilizing the declarative field definitions from zope.schema. Weak typing is supported using the Python pickle protocol. Attributes are automatically persisted with the exception of those starting with the characters "_v_" (volatile attributes). Tables to support the strongly typed attributes are created on-the-fly with a 1:1 correspondence to interfaces with no inheritance (base interface). As such, objects are modelled as a join between the interfaces they implement plus a table that maintains object metadata and weakly typed instance attributes.