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FedoraNew Features, New Collaborations, Bright
Future
Fedora Users ConferenceCopenhagen, Denmark
September 28, 2005
Sandy PayetteCo-Director Fedora Project
Cornell University
Fedora Brief History
• Cornell Research (1997-present) – DARPA and NSF-funded research– First reference implementation developed– Interoperable Repositories (experiments with CNRI)– Policy Enforcement
• First Application (1999-2001)– University of Virginia digital library prototype – Technical implementation: adapted to web; RDBMS
storage– Scale/stress testing for 10,000,000 objects
• Open Source Software (2002-present)– Andrew W. Mellon Foundation grants– Technical implementation: XML and web services– Fedora 1.0 (May 2003)– Fedora 2.0 (Jan 2005)– Fedora 2.1 (coming soon!)
Fedora Development Team
Cornell University
• Sandy Payette (co-director)• Chris Wilper• Carl Lagoze• Eddie Shin
University of Virginia
• Thorny Staples (co-director)
• Ross Wayland• Ronda Grizzle• Bill Niebel• Bob Haschart• Tim Sigmon
“Fedora Inside” Known Use Cases
• Digital Library Collections• Institutional Repository • Educational Software
• Information Network Overlay • Digital Archives and Records Management• Digital Asset Management• File Cabinet / Document Management• Scholarly publishing
Fedora Repository and Web Services
M anage AuthN AuthZ
Access Validation Resource Index
Storage Dissemination Registry
Fedora Repository M odules
M anag e A c c e s s B as icSe arc h
R D FSe arc h
R E S T
C lie n tA pp
Ba tchProgram
O th e rS e rv ice
W e bBrows e r
R E S T S O A PS O A P R E S T S O A PR E S T
O A IP ro v ide r
R E S TWeb Services
Exposure
RDF
filesrdbms
Digital object identifier
Reserved Datastreams Key object metadata
DisseminatorsPointers to service definitions to provide service-mediated views
Datastreams Aggregate content or metadata items
The Basics: Fedora Digital Object
Model Container View
Persistent ID (PID)
Dublin Core (DC)
Datastream
Datastream
Audit Trail (AUDIT)
Relations (RELS-EXT)
Disseminator
Default Disseminator
Fedora – Object Model XML
• FOXML (Fedora Object XML)– Simple XML format directly expresses Fedora object model– Easily adapts to Fedora new and planned features– Easily translated to other well-known formats
• Enhanced Ingest/Export of objects– FOXML, METS (Fedora extension)– Extensible to accommodate new XML formats– Planned: METS 1.4, MPEG21 DIDL
Fedora Service Framework(Fedora 2.1)
F e d o ra Re p o sito rySe rv ice
PROAIOAI P rovide r
Se rvice
Dire ctoryInge st
Se rvice
Futur e
Ser v ice
Serv ices
Apps
Other
Ser v ice
Administrator
Other
Ser v ice
Futur e
Ser v ice
DirIngest Client
ZIP or JARinput
2.1 Release Notes
• Authentication plug-ins– HTTP Basic auth – Tomcat realms and login modules
• Plug-in #1 : Tomcat user/password file or database• Plug-in #2 : LDAP tie-in• Plug-in #3 : Radius Authentication
• Support for SSL
• Authorization module– XML-based policies using XACML– Repository-wide policies– Object-specific policies– Fine-grained policy enforcement
• API actions X subject attributes X object attributes
XACML Policy Examples
• Repository-wide Policy– [xacml-1] Deny access to DC datastream to specific user group
• Object-specific Policy– Deny all access to the object “cornell:cs100” if user is a not a
Cornellian.
• Genre-oriented Policy– [xacml-2] For objects with content model of “uva-image”, permit
students access to disseminations, but deny them access to raw datastreams, but allow professors access to both.
• Time-oriented Policy– Permit students access to “answers” datastream of learning object
cs:125 after May 15, 2005
• Backend Service Security Policy– Deny callback by the external MRSID service identified as “bmech:10”
2.1 Release Notes
• Review of RDF-based Resource Index
– “Relationships” Datastream– Ontology of common relationships (RDF schema)– RDF stored in datastream identified by “RELS-EXT”
– Resource Index (RI)– RDF-based index of repository (automatic indexing into
Kowari triple-store))– Graph-based index includes:
– Object properties and Dublin Core– Object-to-object relationships– Datastream Disseminations (and properties)
– RI Search (Search the repository as a graph)– Powerful querying of graph of inter-related objects– REST-based query interface (using RDQL or ITQL)– Results in different formats (triples, tuples, sparql)
2.1 Release Notes
• New in Fedora 2.1 for Resource Index
– Resource Index corruption problems diagnosed and fixed (Kowari memory bug)
– Minor RI model changes (may require modification of existing static queries by users
– Relaxation of validation rules on RELS-EXT: now accepts ( objectURI --- relation/property --- > URI/literal)
– Method Disseminations (and properties)with option for method X parmVal permutations
– Scale and Performance Testing (NSDL 2M objects, >100M triples)
– Sesame support for triplestore
info :fe do ra/im age :1 1
la stM odDate
hasM em ber
hasM em ber
hasR ep
hasR ep
info:fe dora/ imag e :1 1 /B LDG
in fo:fe dor a/ imag e :1 1 /bde f:2 /g e tR e latedLe tte r
hasRep
i n fo:fe dor a/c ol l e c tion :1 / bde f:1 /MEMB ERS
info :fe do ra/im age :1 2
in fo :fe do ra/c o lle c tio n :1
la stM odDatehasR ep
"2 0 0 5 - 0 1 - 1 0 :1 1 :0 2 "
"2 0 0 5 - 0 2 - 0 1 :1 2 :0 5 "
lastModD
a te
"2 0 0 5 - 0 1 - 0 1 :1 0 :0 0 "
dc :
c rea
tor
"E lly C r am er "
dc:crea to r
"C h r is W ilp er "
in fo:fe dor a/ imag e :1 2 /B LDG
dc:crea to r
"E d d ie S h in "
in fo:fe dor a/ imag e :1 2 /bde f:2 /g e tHIGH
hasR ep
RI: Fedora Objects RDF Graph view
CollectionObject
MemberObject
Fedora 2.1 Release Notes
• PROAI Server (Advanced OAI Provider)– Harvest multiple metadata formats– Harvest datastreams and disseminations– Support for incremental harvest by modified date– Support for OAI sets– Highly configurable via queries against Resource Index
• Directory Ingest Service– Facilitate ingest of hierarchical directories of files– Submit files as .zip or .jar (with a METS manifest)– Automatically asserts parent-child relationships in RELS-EXT– Stages content and ingests as FOXML objects into repository
• Directory Ingest Client– Web client (signed applet)– Browse directory trees, select dir/files, add metadata, add relations– Auto-generates METS manifest for entire collection– Packages as zip/jar and ingests into Fedora repository
2.1 Release Notes
• Rebuild Utility for Repository Indices• Improved logging using log4j
– Trippi.log– Kowari.log– Repository log
• Handle System Plug-in for PID Generation• Command-line utility syntax changes• New Command-line utilities
– fedora-reload-policies– validate-policy– fedora-rebuild
• FedoraClient utility class for building new clients
You asked…
• “We wish for a out-of-box” end-user client for Fedora.”
• “Can’t you put the DSpace interface on top of a Fedora repository?”
• “We need something to show people Fedora right away (before we get $$ for development resources).”
• “We love Fedora. It would be really great if you distributed a default end-user client.”
The Answer: FIRE Client
• Web-based client for “institutional repository”
• End-user content submission• Object creation template for “content
models” • Configurable Workflows• XACML policies coordinated with workflow • Search/Browse collections
Development in progress!
Fedora Service Framework (2005-07)
Fedora RepositoryServ ice
Fedora Serv ices
Apps
PreservationIntegrity
Exte rnalWorkflow
JHOVE
GDFR
FedoraWorkflow
Dialog Box Name
OKTex t:
Tex t
Tex t
Tex t
Tex t
Tex t
Cancel
Help
Sample Text Here Sample Text Here Sample TextHere Sample Text Here Sample Text Here SampleText Here Sample Text Here Sample Text HereSample Text Here Sample Text Here
Sam ple Tex t Here Sam ple Tex t Here Sam ple Tex t Here Sam ple Tex t HereSam ple Tex t Here Sam ple Tex t Here Sam ple Tex t Here Sam ple Tex t HereSam ple Tex t Here Sam ple Tex t Here Sam ple Tex t Here Sam ple Tex t Here
FIRE ClientAdministrator
PRO AI
(OAI Prov ide r)
DirectoryIngest
We b-base dsubmission andbasic workflow
FederationPID
ResolutionPreservationM onitoring
EventNotification
FedoraSearch
O penURLAccessPoint
PolicyBuilder
Oth erService
Pathways
I nterDisseminatorS ervice
aDO Re
arX iv
DS pace
Ope
nUR
LO
penU
RL
Ope
nUR
L
Fedora Development Priorities2006-2007
• Fedora Framework Services• Federated Repositories
– “Fedorations” with name service– Federation with other repositories (DSpace, aDORE,
arXiv)• Cornell/LANL NSF Pathways project• InterDisseminator
• “Content Model” Specification Language• Advanced Object Creation Workbenches• Tools for RDF browse and graph traversal• Scalability/Performance – very large repositories• Web services security and Shibboleth• Code Refactoring
• Fedora as web app (.war)• Fedora Showcase and News (on new website)• Community Coordination and Co-
Development
Collaboration: Fedora Community Working Groups
• Preservation Working Group (Ron Jantz, Rutgers)– Requirements for preservation services– Define service APIs and technical integration with Fedora
2.1 +– Preservation metadata recommendations for Fedora– Prototyping of new services– Development plan for deployment of new services
Collaboration: Fedora Community Working Groups
• Workflow Working Group (Peter Murray, OhioLink)– Sep 05: WORKFLOW WG chartered and begins work– Oct 05: Submit "terminology and problem statement" document to fedora-
users for review– Nov 05: Submit modeling diagrams, workflow process descriptions, and
recommendation for workflow engine to fedora-users for review– Feb 06: Release alpha-quality version of ingestion workflow engine– Apr 06: Release beta-quality version of ingestion workflow engine– Aug 06: Release production-quality version of ingestion workflow engine– Nov 06: Revise documents based upon implementation experience– Feb 07: Release alpha-quality version 2.0 of ingestion workflow engine– Apr 07: Release beta-quality version 2.0 of ingestion workflow engine– Aug 07: Release production-quality version 2.0 of ingestion workflow
engine– Sep 07: Close or recharter the WG
Sample Workflows
Validatebyte-
streams
Ingestto
Repo
Link to Simulation
Service
AssignAccessPolicy
Indexand
Register
Ingest-oriented process
DiagnoseProblems
FormatMigration
ObjectVersioning
In Repo
MakeCopies
IngestTo
Archive
Preservation-oriented process
IngestTo
Archive
SIP
DigitalObject
Submit Review EditReviewAssignPolicy
Publish
Review-oriented process
thesis
Collaboration: Fedora Community Working Groups
• Outreach Working Group (Linda Langschied, Rutgers)– Improve content of Fedora web site
– More user-oriented information (currently technical focus)– Community Showcase – demos, graphics– Survey database with simple web form to profile users
– Collaboration Environment– Wiki, Confluence, other?
• Content Model Working Group (under charter)– Formalization of notion of Fedora content model– XML schema to define content models– Investigate ontology-based content model definition– Round up existing content models and publish to promote reuse
Fedora Community
• Fedora Advisory Board– Vision– Commission Working Groups– Prioritize Development– Define Sustainability Model
• Collaborative Development Opportunities
• Share Tools via www.fedora.info– User-contributed Tools, Apps, Services
Fedora Community (a sampling)
• General questions• Hot topics
– Workflow– Digital object typing– Rdf and relationships– Search and indexing– Collaboration models– other
• Demos– Encylopedia of Chicago– NSDL