Fedora Repository: A Comprehensive Overview

Delve into the world of Fedora Repository, a secure software that stores, preserves, and provides access to digital materials while supporting complex semantic relationships and interoperability with other applications. Learn about the 2014 Fedora Members and the governance of Fedora by stakeholders from various institutions.

• Fedora Repository
• Digital Preservation
• Semantic Relationships
• Interoperability
• Community Governance

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1. Introduction and Feature Tour David Wilcox, DuraSpace

2. DuraSpace and Fedora Fedora is a DuraSpace project It is built and funded by the community Fedora is governed by representatives from stakeholder institutions

3. 2014 Fedora Members (63) Arizona State University Libraries National Library of Medicine University of Connecticut Libraries Brown University Library National Library of Wales / Llyfrgell University of Hull Case Western Reserve University Libraries Genedlaethol Cymru University of Lausanne Charles Darwin University National Research Council of Canada University of Manitoba Colorado Alliance of Research Libraries (CARL) Northeastern University Libraries University of Massachusetts Amherst Libraries Columbia University Library Northwestern University Libraries University of New South Wales Cornell University Ohio State University of Notre Dame Docuteam GmbH Oregon State University of North Carolina Durham University Pennsylvania State University University of Oklahoma Emory University Princeton University University of Pittsburgh FIZ Karlsruhe Rutgers University Libraries University of Oxford George Washington University Smithsonian Institution, Office of Research University of Prince Edward Island Ghent University Library Infomation Services University of Rochester Libraries Gothenburg University Library Stanford University University of Texas Libraries Austin Indiana University State and University Library of Denmark University of Toronto ICPSR Technical University of Denmark University of Virginia Johns Hopkins University Libraries The Art Institute of Chicago University of Western Sydney La Trobe University Tufts University University of Wisconsin London School of Economics & Political University of Alberta University of York Science University of California, Los Angeles Uppsala University LYRASIS University of California, Santa Barbara Yale University Macquarie University University of Cincinnati York University

4. What is a Fedora Repository? Secure software that stores, preserves, and provides access to digital materials Supports complex semantic relationships between objects both within and outside the repository Supports millions of objects, both large and small Capable of interoperating with other applications and services

5. Fedora 4 Project Goals Improved performance Flexible storage options Research data management Linked open data support Improved platform for developers

6. Fedora 4 Production Release Fedora 4.0 released November 27, 2014 Built by 34 Fedora community developers Fedora 4 is a native citizen of the semantic web Support for Hydra and Islandora

7. New Vocabulary Fedora 3 Fedora 4 Objects and datastreams Resources Objects Containers Datastreams Binaries

8. Data Modeling

9. Linked Data Fedora 4 conforms to the LDP 1.0 recommendation Metadata can be represented as RDF triples that point to resources inside and outside the repository Many possibilities for exposing, importing, sharing resources with the broader web

10. Content Models Content can be modeled using RDF properties Cross-community design has produced PCDM: Portland Common Data Model PCDM combines common ontology with LDP interaction model

11. Core Features

12. Standards Focus on existing standards Fewer customizations to maintain Opportunities to participate in related communities

13. Core Fedora Services Create, Read, Update, Delete Versioning Authorization Transactions Fixity Import and export

14. Non-Core Features

15. Two Feature Types External components that consume and act off repository messages Optional, pluggable components that interact with Fedora 4 using a common pattern

16. External Component Integrations Leverage the well-supported Apache Camel project Indexing to search application Indexing to external triplestore Generating and indexing RDF for audit events

17. Pluggable components File System Connector OAI Provider SWORD Server

18. Performance

19. Metrics A number of scalability tests have been run: o Uploaded a 1 TB file via REST API o 16 million objects via federation o 10 million objects via REST API

20. Transaction Performance Multiple actions can be bundled together into a single repository event (transaction) Transactions can provide a 30-60% performance improvement

21. Clustering Two+ Fedora nodes can be clustered together Fedora 4 currently supports clustering for high- availability A load balancer can be used to evenly distribute read requests across each Fedora node

22. Further Reading Fedora 4 Wiki o https://wiki.duraspace.org/display/FF/ Fedora 4 Documentation o https://wiki.duraspace.org/display/FEDORA4 x/Fedora+4.x+Documentation