| 1 | The Proxies and actual instantiation are linked by messages whose semantic content is defined (best) in XML |
| 2 | The lower system level format can be HTTP RMI IIOP or ... |
| 3 | The client proxy is for rendering input and output including specification of object |
| 4 | The middle tier proxy allows choice of backend provider and functional integration (the user can specify integration at client proxy level) |
| 5 | Real Capability |
| 6 | XML |
| 7 | XML |