With File Coexistence and Migration, you can:
        
          - 
            Import V4 and V5 files and their related documents into the V6
database (Only normal scale data import is supported).
          
-  Use the stored documents as native V6 data after migration.
            
          
- 
            Open FBDI in interactive and batch modes.
          
- Acquire the advantage of executing V6 functionality along with V4 and V5 legacy
 
  With Downward Compatibility you can:
- Export 3DEXPERIENCE files to a V5 database (Normal and small scale data export is supported)
- Open Downward Compatibility in interactive and batch modes.