Durable Item Relations for DSpace
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This document discusses revising the approach for modeling relationships between items in DSpace to make it more flexible and extensible. The initial approach involved new DSpace object types for different relationship types, but this would require a new code release each time a new type of complex object was supported. The revised approach uses generic relationship types of "hasPart" and "isPartOf" that can connect any kind of items. Relationships can be created and exposed via the user interface and APIs to provide a flexible way to model complex archival objects and collections in DSpace.
Durable Item Relations for DSpace
- 1. Durable Item Relations for DSpace
- 2. OVERVIEW Context DSpace 4 out of the box Initial approach Revised approach Creating and managing relations Conclusions
- 3. CONTEXT What is the resemblance between
- 4. CONTEXT
- 5. CONTEXT
- 6. GOOD ANSWERS Based in Flanders Subject to annual environment reports
- 7. ANNUAL ENVIRONMENT REPORTS A complex object with different parts and attachments Metadata recorded and represented in XML Mix of confidential and public data Prime usecase for digital preservation, open data and archiving at the Flemish government
- 8. DSPACE 4 OUT OF THE BOX One-to-many relationships Community > Collection > Item > Bundle > Bitstream Metadata and search: Item as the central object Not optimized for large numbers of collections Resource policies
- 9. INITIAL APPROACH Typed items: “Document” Items vs “Dossier” Items Typed relations ... as a new DSObject Cardinality and type enforced
- 10. INITIAL APPROACH - NEW DSPACE OBJECTS
- 14. INITIAL APPROACH - NEW DSPACE OBJECTS
- 15. INITIAL APPROACH - EXTENSIBILITY “How do we add archiving support for another application with a different kind of complex object?” Answer: adding new RelationshipTypes, Relationships and Typed objects in the DSpace Java codebase.
- 16. “A new release of our DSpace codebase, every time we want to support a new set of complex objects?” “Yeah - that’s not going to fly”
- 18. REVISED APPROACH Generic relationship-types: hasPart and isPartOf No more typed items - allow these relations between all kinds of items
- 19. CREATING RELATIONSHIPS SWORD Package deposit for an entire archival package. Results in different related items Shared codebase with CLI Item ingestion tools UI for creating and modifying relationships not in scope yet
- 20. EXPOSING RELATIONSHIPS Item pages list related items, and the nature of the relation (hasPart and isPartOf) Relations are indexed in Discovery as well for exposure via SOLR Soon: relationships exposed via REST API
- 21. CONCLUSION Enforcing cardinality DSpace 5 features Metadata 4 all Better performance for many collections Contribution - Looking for feedback!
- 22. IMAGE CREDITS Oriol Salvador https://www.flickr.com/photos/boarderland/ Steve Taylor https://www.flickr.com/photos/esartee/ Tiochorchi http://tiochorchi.deviantart.com/