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- Fedora Digital Object Repository System
- Extensible digital object model
- Repository System exposed via Web service APIs
- Scalable, persistent storage for content and metadata
- Local and remote content
- Associate services with objects
- Content versioning
- Fedora Use cases
- Content Management (CMS)
- Digital Library architecture
- Digital Asset Management
- Institutional Repository
- Scholarly publishing
- Preservation
- Open source software
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- Research (1997-present) :
- DARPA and NSF-funded research project at Cornell
- Reference implementation developed at Cornell
- First Application (1999-2001) :
- University of Virginia digital library prototype
- Scale/stress testing for 10,000,000 objects
- Open Source Software (2002-present):
- Andrew W. Mellon Foundation granted Virginia and Cornell $1 million to
develop a production-quality Fedora system
- Fedora 1.0 released in May 2003
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- Generic model to manage/access heterogeneous content
- Operations via the digital object abstraction; default disseminator
- Extensibility
- Add new functionality to objects via service associations
- Object Lifecycle and preservation
- Content versioning and event history
- Content repurposing
- Same content in different objects; dynamic transformations
- Easy integration with other applications and systems
- Web services with open APIs
- Clear separation of server from clients/web user interfaces
- Does not assume any one workflow or end-user application
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- [Simple Image]
- Image Manip + DC graph
- [Scholarly Publication]
- Document Transformation
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- Open Fedora APIs
- Repository as web services (REST and SOAP bindings); WSDL interface
defs
- Flexible Digital Object Model
- Content View: objects as bundle of items (content and metadata)
- Service View: objects as a set of service methods (“behaviors”)
- Extensible functionality by associating services with objects
- Repository System
- Core Services: Management, Access/Search, OAI-PMH
- Storage: XML object store;
relational db object cache; relational db object registry
- Mediation - auto-dispatching to
distributed web services for content transformation
- Auto-Indexing – system metadata and DC record of each object
- HTTP Basic Authentication and Access Control
- Built-in disseminator services: XSLT x-form, image manipulation,
xml-to-PDF
- Content Versioning
- Automatic version control (saves version of content/metadata when
modified)
- Enables date-time stamped API requests (see object as it looked at a
point in time)
- Clients
- Fedora Administrator: GUI client to create/maintain objects
- Default Web browser interface: search; access objects via default
disseminator
- Command line utilities (batch load, ingest, purge, others)
- Migration Utility – mass export/ingest
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- Management Service (API-M)
- Ingest - XML-encoded object submission
- Create - interactive object creation via API requests
- Maintain - interactive object modification via API requests
- Validate – application of integrity rules to objects
- Identify - generate unique object identifiers
- Security - authentication and access control
- Preserve - automatic content versioning and audit trail
- Export - XML-encoded object formats
- Access Service (API-A and API-A-LITE)
- Search - search repository for objects
- Object Reflection - what disseminations can the object provide?
- Object Dissemination - request a view of the object’s content
- OAI-PMH Provider Service
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- Open Source (Mozilla Public License)
- 100% Java (Sun Java J2SDK1.4)
- Supporting Technologies
- Apache Tomcat 4.1 and Apache Axis (SOAP)
- Xerces 2-2.0.2 for XML parsing and validation
- Saxon 6.5 for XSLT transformation
- Schematron 1.5 for validation
- MySQL and Mckoi relational database
- Oracle 9i support
- Deployment Platforms
- Windows 2000, NT, XP
- Solaris
- Linux
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- University of Virginia: digital library (images, EAD, e-texts)
- VTLS: basis for new commercial product (library system)
- Indiana University: EVIA Digital Archive (video)
- Northwestern: academic technologies (images, art, video, e-texts)
- Rutgers University: digital library (e-journals, numeric data)
- Tufts University: educational (VUE/concept maps); digital library
- Yale University: Electronic Records Archive
- New York University: Humanities Computing Group
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- JSTOR
- American Geophysical Union
- NSDL at Cornell
- Cornell Information Technologies
- British Library
- National Library of Portugal
- Society of Biblical Literature
- National Archives of Australia
- Office of Defense Resources, Thailand
- Monash University, Australia
- Oxford Digital Library
- Harris Corporation (R&D for digital archives)
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- Total downloads: 1427
- Average downloads per day: 9
- # Countries: 32
- Types of orgs:
- Universities: libraries, IT, departments
- Software and technology companies
- Defense/military
- Banks
- National libraries and archives
- Publishers
- Research labs
- Library automation vendors
- Scholarly societies
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- Fedora Object XML (FOXML)
- Internal storage format; direct expression of Fedora object model
- Better support for relationships (“kinship” metadata)
- Better support for audit trail (event history)
- Format identifiers for dynamic service binding
- Shibboleth authentication
- Policy Enforcement
- XACML expression language
- Fedora policy enforcement module
- Web interface for easy content submission
- Batch object modification utility
- Administrative Reporting
- Object Event History (ABC/RDF disseminations)
- Better support for “collections”
- New ingest and export formats (METS1.3, DIDL)
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- Digital Library in a Box
- Full-featured DL application with “Fedora inside”
- Optimized for common set of content types
- Fedora Power Server
- Integrity Management Tools
- Service and link liveness checker
- Fault Tolerance
- Mirroring and Replication
- Peer-to-peer interoperability features
- Repository clustering
- Load balancing
- Object Creation Tools
- Workflow applications based on content models
- Web interface for document/content submission
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