Link/checklist for migrating applications from Oracle 9i to Oracle 11g?Help

Hi all,
We need to perform an impact analysis on migratiing an application from Oracle 9i to Oracle 11g. Does any of you have a detailed checklist to follow, in terms of queries, PL/SQL statements, optimizer etc. etc., when attempting this migration. We require something more specific from the application point of view rather than a DBA point of view.
Additionally, we have queries written extensively with rule hints. Should there be a special consideration for the same since now we are moving to CBO in 11g
Even if any one has a link, that would help. Thank you so much!

Hi Nikhil,
Thanks Xaheer,You're welcome :)
I'm going through the link: http://download.oracle.com/docs/cd/E11882_01/server.112/e10819/toc.htm
But it still mentions stuff from a DBA angle. I need from an application angle.
Do I need to change my queries taht are current written with RBO? Do I need to change Pl/SQL blocks ?Please refer tech below notes:
*1)TROUBLESHOOTING: Server Upgrade Results in Slow Query Performance -- 160089.1*
*2)TESTING SQL PERFORMANCE IMPACT OF AN ORACLE 9i TO ORACLE DATABASE 10g RELEASE 2 UPGRADE WITH SQL PERFORMANCE ANALYZER -- 562899.1*
Before upgrading your production database, please perform upgrade of test database and do complete testing.
Hope helps
Regards,
X A H E E R

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