1. An integration server system that enables data modeling and storage operations of data objects, the system comprising: a processor operable to execute instructions stored in a data storage medium; a database operable to store data accessible to the processor; a model generator adapted to create a database schema including one or more database tables in response to a model description defining one or more data objects, wherein the database schema is configured to store a set of data object instances in the database, and wherein the model generator is adapted to create object structures having one-to-one and one-to-many mappings; and an application programming interface operable to enable a client application to create instances of a data object in the database schema and provide the client application with access to the set of data object instances as separate data objects enabling the client application to perform the data modeling and storage operations of data objects.