Digital Preservation Panel Short Paper Presentation Medusa at

Digital Preservation Panel Short Paper Presentation 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 July 23, 2013 Joint Conference on Digital Libraries Indianapolis, Indiana

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

Access Systems • Content. DM: 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 • Hathi. Trust: digitized books • Voyager catalog and locally-developed web pages: digitized books and book-like content • Archon: digitized manuscripts and archival content • Olive Active. Paper: digitized newspapers • Ensemble Video: streaming video content, primarily digitized from the University Archives • DLXS: XML-driven text-analysis research projects

Medusa Digital Preservation Service • https: //medusa. library. illinois. edu/ • Documentation: https: //wiki. cites. illinois. edu/wiki/display/Library. Dig ital. Preservation/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)

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

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

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

Medusa Technical Architecture

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

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 • Lo. Res PDF • Hi. Res PDF • … • Parent • Basic Compound Asset • First Child • Parent • Next Sibling • Previous Sibling • Derivation • Has Source • Is Source Of • …

Example <relationship> <relationship. Type>Paged_Text_Asset</relationship. Type> <relationship. Sub. Type>Pages</relationship. Sub. Type> <related. Object. Identification> <related. Object. Identifier. Type>LOCAL</related. Object. Identifier. Type> <related. Object. Identifier. Value>MEDUSA: xxx. 2</related. Object. Id </related. Object. Identification> </relationship>

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

Fedora CModel for PREMIS File Object • info: fedora/afmodel: Medusa. Premis_File. Object – DC – RELS-EXT • • • http: //medusa. library. illinois. edu/ns#relationship. Type. Relationship. Subtype. Linking. E http: //www. loc. gov/premis/rdf/v 1#has. Event http: //www. loc. gov/premis/rdf/v 1#has. Rights. Statement http: //www. loc. gov/premis/rdf/v 1#has. Intellectual. Entity – PREMIS-FILE-OBJECT (inline PREMIS XML) – CONTENT (managed content)

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