| SQL_Interface | parent for database manipulation subclasses |
| Driver_Interface | PDO Interface to implement for database drivers |
| Abstract_SQL | parent for database manipulation subclasses |
| Firebird_Result | Firebird result class to emulate PDOStatement Class - only implements data-fetching methods |
| Firebird_Util | Firebird-specific backup, import and creation methods |
| Firebird | Firebird Database class |
| MySQL_Util | MySQL-specific backup, import and creation methods |
| Abstract_Util | Abstract class defining database / table creation methods |
| Abstract_Driver | Base Database class |
| SQLite_Util | SQLite-specific backup, import and creation methods |
| PgSQL_Util | Posgres-specific backup, import and creation methods |
| PgSQL_SQL | PostgreSQL specifc SQL |
| MySQL_SQL | MySQL specifc SQL |
| Firebird_SQL | Firebird Specific SQL |
| SQLite | SQLite specific class |
| SQLite_SQL | SQLite Specific SQL |
| PgSQL | PostgreSQL specifc class |
| MySQL | MySQL specific class |