| DataControl (RDS) | Binds a data query Recordset to one or more controls (for example, a text box, grid control, or combo box) to display the Recordset data on a Web page. | 
| DataFactory (RDSServer) | Implements methods that provide read/write data access to specified data sources for client-side applications. | 
| DataSpace (RDS) | Creates client-side proxies to custom business objects located on the middle tier. |