This document summarizes an RDF in Hydra summit. It lists the participants and objectives of examining implications and opportunities of Fedora 4 and Hydra. Key discussion highlights included that RDF is a mechanism to leverage linked data, convoluted terminology around data models and ontologies, and examples of RDF usage in Hydra practice. Reasons for using RDF included granularity of description, flexibility and extensibility of schemas, reusability of linked data, and RDF being machine actionable. Next steps proposed forming a Hydra working group to address issues and having breakout sessions.

1. RDF IN HYDRA SUMMIT
OVERVIEW
Brought to you by
Karen Estlund
Head, Digital Scholarship Center
University of Oregon
kestlund@uoregon.edu

2. Participants
• Declan Fleming, UCSD
• Matt Critchlow, UCSD
• Tom Cramer, Stanford
• Lynn McRae, Stanford
• Chris Beer, Stanford
• Mark Bussey, DCE
• Mike Giarlo, Penn State
• Tom Johnson, Oregon State
• Karen Estlund, University of Oregon
• Jon Stroop, Princeton University
• Jeremy Friesen, Notre Dame
• James Van Mil, University of Cincinnati

3. Objectives
1. Compare Practices and Approaches
2. Examine the implications / opportunities:
• Fedora 4
• Hydra

4. Discussion Highlights

5. RDF is not synonymous with Linked Data.
RDF is a mechanism to leverage Linked Data.

6. Convoluted Terms
• Data Model
• Ontology
• Application Profile
• Data Dictionary

7. RDF in Hydra In Practice
• Qualified Dublin Core
• GeoNames
• MODS
• LC Subjects
• Heterogeneous
• Dublin Core
• MODS
• VRA Core
• DarwinCore
• DataCite
• Etc…
• Lexvo Languages
• LC Genres
• AAT
• Etc..

8. od:mk61rg94h
dct:title ‘A Cake-Shop Romance’
od:mk61rg94h
marcrel:cmp
lcna:82102932
od:mk61rg94h
opns:sheetmusic/firstLine
‘The gingerbread man all crisp and alert’

9. Why RDF?

10. It’s Coming
Photo by Terry Reese. CC-BY-SA.

11. Cburnett. (2007 April 6). Model of the atom by Ernest Rutherford.
http://commons.wikimedia.org/wiki/File:Rutherford_atom.svg
Used with a CC-BY-SA license.

12. Why RDF?
• Granularity of description
• Flexibility of schema
• Extensibility of schema
• Re-usability and utilization of Linked Data
• Self-describing and can carry meaning
It’s not just machine readable; it’s machine actionable!

13. Skolemization
• Assigning a URI to a Blank Node
My
Presentation
Give me a place in this
world!
dcite:creator
dcite:nameIdentifier
dcite:creatorName
Estlund, Karen
uo:951...

14. http://goo.gl/GdHE52

15. RDF in Hydra Architecture

16. Next Steps
1. Start a Hydra Working Group to address these
2.
3.
4.
5.
issues
Interested?
Come find me or other RDF aficionados
Breakout session today TBD to model out
solutions
Friday breakout session to work with RDF and
ActiveFedora