| AiDb | The interface for DBMS implementors |
| AiPgsql | An implementation of the abstraction of the PostgreSQL database engine |
| AiMysql | An implementation of the abstraction of the MySQL database engine |
| AiOracle | An implementation of the abstraction of the Oracle database engine |
| AiUtil | Utility functions to make writing code easier. |
| AiCommon | A class to manage Common needs. For this project, this is used as a gateway to the database layer. |