1. DDI Best Practices Technical Best Practices

2. High Level Architecture URNs and Entity Resolution Managing Unique Identifiers DDI as Content for Repositories

3. Interoperability Sharing

4. DDI Application Architecture

5. Some Pitfalls Maintain link integrity Avoid circular references Preserve other people’s metadata

6. DDI as Content for Repositories

7. DDI and Registries

10. URNs and Entity Resolution

11. System Requirements High Availability Scalability Compatibility

12. Domain Name System

14. Managing Unique Identifiers

15. Guaranteeing Uniqueness Prefix User friendly IDs Responsibility lies with user

16. Guaranteeing Uniqueness Prefix User friendly IDs Responsibility lies with user Register User friendly IDs Must maintain registry

17. Guaranteeing Uniqueness Prefix User friendly IDs Responsibility lies with user Register User friendly IDs Must maintain registry UUID Automatic, true guarantee User unfriendly IDs

19. Agency Considerations Changing Authority Individual Researchers Consortiums

25. Interoperability Sharing

26. Thank You Jeremy Iverson jeremy@algenta.com