Replication between different db versions?

Can anyone tell me what limitations there might be performing data replication between different oracle database versions?
Thanks

Depends on the versions and what exactly you mean by "replication", since there are a variety of technologies that may fall under that umbrella.
You can't directly replicate data between a 7.3.4 database and a 10.1 database, for example. You can use a variety of replication technologies between a 9.2 database and a 10.1 database-- materialized views, multi-master materialized views, Streams, transportable tablesspaces-- though you cannot use things like DataGuard, which may fall under the replication umbrella in some cases.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

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