Working with ABAP Proxies 
Enterprise Services Repository Browser
An overview of how to work with objects in the Enterprise Services Repository.
Technical background of proxies and how to generate proxies
More Information
Additional documentation is available from within the ABAP Proxy Generation tool. From transaction SPROXY, choose 
(Display online documentation) to
open the documentation menu.
The following areas are covered:
Mapping XSD Types to ABAP Types
Proxy Programming Model
XI Messages and Object Links
Generation Tips