| Feature | Directionality | Cited in | Notes |
|---|
| Synchronize event metadata | ASpace ↔ Hydra | Duke 6 | |
| Apply aggregate-level metadata from ASpace to Hydra objects, and for each Hydra object, add a link back into ASpace | ASpace ↔ Hydra | Penn State 4 | |
| Associate a Hydra ingest with an ASpace collection object, creating an ingest event in ASpace | ASpace ↔ Hydra | Penn State 1 & 2, Rock Hall 3 | |
| View an ASpace-held arrangement, use it to arrange Hydra-held objects, & feed that arrangement back into ASpace | ASpace ↔ Hydra | Penn State 3, Rock Hall 2 | |
| Import descriptive and technical metadata from Hydra into ASpace, and link back into Hydra | ASpace ↔ Hydra | Stanford 1a | |
| Harvest new and updated finding aids from ASpace into Hydra | ASpace ➡ Hydra | Duke 2, Stanford 2 | |
| Filter harvested finding aids to only published/final ones | ASpace ➡ Hydra | Duke 2b, Stanford 1 | |
| Import new and updated finding aid metadata from ASpace into Hydra | ASpace ➡ Hydra | Northwestern 3 | |
| Import finding aid metadata into a Hydra/Blacklight-based catalog | ASpace ➡ Hydra | Stanford | |
| Create a finding aid in ASpace from repository-held metadata | Hydra ➡ ASpace | CHSSC 1 | |
| Import digital object metadata from Hydra into ASpace (with linked digital object records) | Hydra ➡ ASpace | Northwestern 2 | |
| Add links to Hydra-held objects in ASpace-held finding aids | Hydra ➡ ASpace | Rock Hall 1 | |
| Push Avalon-held metadata into ASpace | Hydra ➡ ASpace | Virginia | |
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