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- DspaceStatistics
- PersistentIdentifiers - Making identifiers 'pluggable' (Handles, ARKs...)
- NetworkInterfaces - e.g. Web Services, WebDAV etc.
- HistorySystem
- Item + Versioning + Support - approaches to supporting multiple versions over time (i.e. editions, as opposed to multiple formats of the same version)
- BitstreamRelationships - proposal to encode relationships between bitstreams explicitly in the data model.
...