This document provides an overview of Fedora 4 including its goals, features, and roadmap. The key points are: - Fedora 4 aims to improve performance, support flexible storage options, research data management, linked open data, and be an improved platform for developers. - Fedora 4 beta was released in 2014 and featured the same capabilities as the upcoming production release. Acceptance testing, beta pilots, and community feedback will inform the production release. - Fedora 4 highlights include content modeling, authorization, versioning, scaling to large files and objects, integrated and external search, and linked data/RDF support.

1. Fedora 4 Deep Dive
June 13, 2014
David Wilcox, Product Manager
Chris Beer, Software Engineer
Andrew Woods, Tech Lead

2. Project goals
● Improved performance
● Flexible storage options
● Research data management
● Linked open data support
● Improved platform for developers

3. Fedora 4 - a year in review
● Fedora 4 Alpha released at OR2013
● Defined governance model
● Distilled feature list for Fedora 4.0
● Fedora 4 Beta released at OR2014

4. Fedora 4.0 Beta
● It’s out! Download it now
● 4.0 Beta features = 4.0 Production features
● Fedora 4.0 Beta targets new repositories
● Next: Fedora 4.0 Production release

5. The road to production
● Acceptance testing
● Beta pilots
● Community feedback
● Developer commitments

6. Developer commitments

7. Community update
● Hydra
● Islandora
● Art Institute of Chicago
● Spotlight

8. Spotlight over Fedora 4

14. mods_altnames_tsim =
modsrdf:namePrincipal /
modsrdf:authorityLink /
madsrdf:hasExactExternalAuthority /
foaf:focus / foaf:name :: xsd:string ;

15. modsrdf:namePrincipal /
modsrdf:authorityLink /
madsrdf:hasExactExternalAuthority /
foaf:focus / foaf:name :: xsd:string ;

16. modsrdf:authorityLink /
madsrdf:hasExactExternalAuthority /
foaf:focus / foaf:name :: xsd:string ;

17. madsrdf:hasExactExternalAuthority /
foaf:focus / foaf:name :: xsd:string ;

19. http://url/to/object
http://url/to/object

20. ● Content modeling
● Authorization
● Durable Storage
● Versioning
● Scale (large files and many files)
● Linked data / RDF (and external triplestore)
● Internal & external search
● Transactions
F4 feature highlights
● Locking
● Performance
● Clustering

21. Content modeling
● Define object
○ properties and
○ children objects
● Define datastream properties
● Properties have “type”
● Relationships vs. repository structure

22. RDF / Linked data
● Complies with Linked Data Platform1.0
recommendations
● Resource descriptions modeled as triples
● Native and external SPARQL-Query

23. Ease of installation
● Simple web application (war file)
● One-click-run
○ Only dependency: Java7

24. Scale
● 1 TB file via REST
● 16 million objects via Projection
● 5 million objects via REST
● Range requests

25. CRUD operations

26. “List” operations - 3 tier projection

27. “List” operations - 4 tier projection

28. Version creation

29. Fedora 4 roadmap
● Engage Beta pilots
● Release Fedora 4.0-Production
● Support Fedora 3.x to 4.x migrations
● Select key features for 4.1+

30. Contact information
Fedora mailing lists
https://wiki.duraspace.org/display/FF/Mailing+Lists+etc
David Wilcox
dwilcox@duraspace.org
Andrew Woods
awoods@duraspace.org