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, Joint Conference on Digital Libraries Indianapolis, Indiana
OAIS Management SIP: Submission Information Package AIP: Archival Information Package DIP: Dissemination Information Package
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
Medusa Digital Preservation Service Documentation: italPreservation/Home 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)
National Digital Infrastructure and Information Preservation(NDIIPP) Program grants Phase I : Phase II: “Hub and Spoke” (HandS tool suite): x.html x.html
Metadata for Digital Preservation Intellectual entities Rights Objects Agents Events Metadata standards in Medusa: PREMIS (digital preservation metadata) MODS (descriptive metadata)
Quick Overview of Architecture Modeling Complex/Compound Objects in PREMIS Fedora Content Models for PREMIS Part 2
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 LoRes PDF HiRes PDF … Parent Basic Compound Asset First Child Child Parent Next Sibling Previous Sibling Derivation Has Source Is Source Of …
Example Paged_Text_Asset Pages LOCAL MEDUSA:xxx.2
Separate Fedora Object and Content Model for Each PREMIS Entity All PREMIS relationships are converted to Fedora RELS_EXT PREMIS to Fedora Content Model
info:fedora/afmodel:MedusaPremis_FileObject – DC – RELS-EXT – PREMIS-FILE-OBJECT (inline PREMIS XML) – CONTENT (managed content) Fedora CModel for PREMIS File Object
Questions? Medusa documentation (more coming soon) : LibraryDigitalPreservation/Home LibraryDigitalPreservation/Home More on digital preservation at UIUC: digital_preservation/digital_preservation.html digital_preservation/digital_preservation.html Contact: