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- Geographically distributed data
- Themes
- multi-database query capability
- transparently "crossing" the border
- data mobility
- database and model heterogeneity - RDBs handle database heterogeneity
- provide heterogenous transactions - Some OODBs weak on data mobility
- No successful strategy yet for model heterogeneity
Matthew Ward
Fri Jul 18 13:17:40 EDT 1997