Hi Dileep:
As Scott mentioned, the documents are available at https://connect.ariba.com. Access to Connect and product documentation is available to licensed users only. Noted below is general information regarding the differences between 8.2.2 and 9r1 provided that our product manager provided:
Technical differences: 9r1 retains much of the underlying Java architecture of 8.2.2 however there we several package changes as well as removal of references to deprecated Java classes and methods.
Functional differences: 9r1 has a simplified UI that integrates the dashboard into the products for both upstream and downstream. The overall process flow for other approvable document types was also simplified/enhanced quite a bit where possible to limit the number of page views/clicks necessary for users to complete their work.
Regards,
Debbie Curtis-Magley
Ariba Exchange Community Manager