Importing oracle 9 dump to oracle 8

I was wondering if dump file from oracle 9 can be imported to oracle 8. If yes, is there anything to be done in creating a dump file in oracle 9?
Thanks in advance.

As Justin said, or if the version 8 system is on another platform and the tnsnames.ora entry for the version 9 db is not available and you are not allowed to add it then you can use dbms_metadata to dump the DDL, SQLPlus to dump the data into delimited files, binary ftp the extracts to the version 8 platform, and use sqlldr to re-populate the tables. Exp using version 8 from the version 8 platform via Oranet is obviously easier.
HTH -- Mark D Powell --

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