| Feature |
Directory |
Basic Registry |
Advanced Registry / CMS |
| Metadata |
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| Arbitrary Content |
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| Content specific Validation |
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| Content specific Cataloging |
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| Version control |
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| Pre-defined queries |
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| Ad hoc queries with predicate support |
? |
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| Pre-defined taxonomies |
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| Custom taxonomies |
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| Taxonomy browsing and validation |
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| Ontology support |
? |
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| Arbitrary Associations |
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| Simple event notification |
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| Content based event notification |
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| Service registration / discovery |
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| Collection support (ability to group things together) |
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| Security |
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| Digital signature authentication |
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| Custom Acess Control based on identity, role, group |
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| Audit trail |
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| Architecture |
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| Object replication |
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| Federated queries |
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| Remote object refereneces from one node to another |
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| Object oriented information model |
? |
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| Extensible information model |
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| Extensible API |
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| HTTP API binding |
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| SOAP API binding |
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| ebMS API binding |
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