RATIONALE Make it possible to restore a CS/default backup of one engine on another engine. REQUIREMENT - Default driver must save data independent of storage engine - Consistent snapshot driver must store data independent of storage engine SUMMARY Currently the default and CS backup drivers store rows read from a table in the raw format used by the storage engine. We should use more engine-agnostic format which is used now in row-based replication. Mats has written methods for transforming between two formats and we can easily utilize them in the drivers. However, we must think about future backward compatibility, in case the record storage format changes due to development in the replication code. Our tool for that is image version numbers. WL#4749 has been created for testing this property.