1. Digital Preservation Panel Medusa at the University of Illinois at Urbana-Champaign: A Digital Preservation Service Based on PREMIS Kyle Rimkus, Preservation Librarian Tom Habing, Head of Software Development University of Illinois Urbana-Champaign Library Short Paper Presentation July 23, 2013 2013 Joint Conference on Digital Libraries Indianapolis, Indiana

2. OAIS Management SIP: Submission Information Package AIP: Archival Information Package DIP: Dissemination Information Package

3. Access Systems ContentDM: digitized unique and rare materials from locally held collections DSpace: IDEALS institutional repository and electronic theses and dissertations ARTStor: image collections used for teaching and learning Internet Archive: books digitized through participation in the Open Content Alliance HathiTrust: digitized books Voyager catalog and locally-developed web pages: digitized books and book-like content Archon: digitized manuscripts and archival content Olive ActivePaper: digitized newspapers Ensemble Video: streaming video content, primarily digitized from the University Archives DLXS: XML-driven text-analysis research projects

4. Medusa Digital Preservation Service https://medusa.library.illinois.edu/ Documentation: https://wiki.cites.illinois.edu/wiki/display/LibraryDig italPreservation/Home https://wiki.cites.illinois.edu/wiki/display/LibraryDig italPreservation/Home enduring storage and management environment for digital content at the University of Illinois at Urbana-Champaign Library Infrastructure based on the Open Archival Information System reference model (OAIS) policies and underlying technological architecture designed in keeping with the model of a Trustworthy Digital Repository (TDR)

5. National Digital Infrastructure and Information Preservation(NDIIPP) Program grants Phase I : 2004-2007 Phase II: 2007-2010 “Hub and Spoke” (HandS tool suite): http://dli.grainger.uiuc.edu/echodep/hands/inde x.html http://dli.grainger.uiuc.edu/echodep/hands/inde x.html

6. Metadata for Digital Preservation Intellectual entities Rights Objects Agents Events Metadata standards in Medusa: PREMIS (digital preservation metadata) MODS (descriptive metadata)

7. Quick Overview of Architecture Modeling Complex/Compound Objects in PREMIS Fedora Content Models for PREMIS Part 2

8. Medusa Technical Architecture

9. Modeling Complex/Compound Objects with PREMIS Intellectual entities Rights Objects Agents Events

10. PREMIS Relationship Type & Subtype Collection Is Member Of Metadata MODS MARC … Parent Basic Image Asset Production Master Archival Master Screen Size … Parent Paged Text Asset Pages LoRes PDF HiRes PDF … Parent Basic Compound Asset First Child Child Parent Next Sibling Previous Sibling Derivation Has Source Is Source Of …

11. Example Paged_Text_Asset Pages LOCAL MEDUSA:xxx.2

12. Separate Fedora Object and Content Model for Each PREMIS Entity All PREMIS relationships are converted to Fedora RELS_EXT PREMIS to Fedora Content Model

13. info:fedora/afmodel:MedusaPremis_FileObject – DC – RELS-EXT http://medusa.library.illinois.edu/ns#relationshipTypeRelationshipSubtype http://medusa.library.illinois.edu/ns#relationshipTypeRelationshipSubtypeLinkingEvent http://www.loc.gov/premis/rdf/v1#hasEvent http://www.loc.gov/premis/rdf/v1#hasRightsStatement http://www.loc.gov/premis/rdf/v1#hasIntellectualEntity – PREMIS-FILE-OBJECT (inline PREMIS XML) – CONTENT (managed content) Fedora CModel for PREMIS File Object

14. Questions? Medusa documentation (more coming soon) : https://medusa.library.illinois.edu https://wiki.cites.uiuc.edu/wiki/display/ LibraryDigitalPreservation/Home https://wiki.cites.uiuc.edu/wiki/display/ LibraryDigitalPreservation/Home More on digital preservation at UIUC: http://www.library.illinois.edu/prescons/services/ digital_preservation/digital_preservation.html http://www.library.illinois.edu/prescons/services/ digital_preservation/digital_preservation.html Contact: rimkus@illinois.edurimkus@illinois.edu