The Form 2350 (2011v2.1) schema and business rule packages have been posted to IRS.gov. The ATS and Production dates are TBD.
The "Diff" Files in the schema package identify the changes.
The Form 2350 (2011v2.1) business rules have been posted in two (2) formats that contain identical information: Adobe (.pdf) and Comma Separated Values (.csv).
If you have any questions about the schemas or business rules, please send your inquiry to the MeF Mailbox.