2. What does this talk have to say
about “applications” which is the
theme of this track?
3. Social and Technical Forces
Waves of Repository-Enabled Applications
• Institutional Repo and Digital Library Apps
• IR: Scholars to deposit articles, etc.
• DL: Digital library search and access; collections
• Collaborative “Web 2.0”
• collaborative filtering
• annotate; discuss scholarly materials
• E-Science, E-Research, Data-Intensive
• Publications linked to data
• Data aggregation from distributed sources
• Fusion, simulation
7. Emergence of Infrastructure
Source: Understanding Infrastructure: Lessons for New Scientific
Infrastructure, http://deepblue.lib.umich.edu/handle/2027.42/49353
Systems
Heterogeneous components
Central control
Closed, stable
Dedicated/improvised gateways
Heterogeneous systems
Distributed control
Coordination
Generic gateways
Open, reconfigurable
Networks
10. Repositories: Disruptive or Disrupted?
• Where’s the multi-institutional perspective?
• Where’s the Web?
• What constraints do we impose by starting with the
perspective of a single institution or “enterprise”?
• What impact will “Cloud” storage and computing have?
• What is the best path to real interoperability?
• When do you need complex vs. simple and good enough?
• How assert leadership in emerging value networks?
12. Object Re-Use and Exchange
(OAI-ORE)
Data model for describing bounded aggregations in Web graph
http://www.openarchives.org/ore/
13. Hubble optical observation
Baltimore, MD
Basic object information
Strasbourg, France
E-Science Aggregations
And in digital scholarly communication, the single
container concept is obsolete.
text
2006 Astrophysics paper
X-MM-Newton X-ray observation
Vilspa, Spain
Chandra X-ray observation
Cambridge, MA
A1795
14. Fedora objects can map to ORE
Identified, bounded aggregations of related
information units that form a logical whole.
Components of a digital object may vary
according to:
– Semantic type: book, article, software,
dataset, simulation, …
– Media type: text, image, audio, video, mixed
– Media format: PDF, HTML, JPEG, MP3, …
– Network location
– Relationships: internal, external
HTML
MP3
Identifier
PDF
ORE Resource Map Exposure
ore:describes
15. Network of Digital Objects …
aggregations related to aggregations
PID 4
PID 1
PID 3
ore:describes
ore:describes
ore:describes
DC
DC
DC
HTML
17. A History of Fedora Repository Project’s
Technical Approaches to Interoperability
• 1998: Interfaces
• Generic interfaces to access and manage digital objects in a repository
• Extensible interfaces on digital objects (“Disseminators”) to provide uniform service access
points for heterogeneous underlying content
• 2001: Web Services
• APIs to access and manage digital objects in a repository
• SOAP and REST over HTTP
• 2002: XML-based digital object serialization formats
• METS
• FOXML (Fedora Object XML)
• 2005: Semantic Technologies and RDF (RDF-based “Resource Index”)
18. Now, make it fit better with Web in 2008+
• 2008: Atom Syndication Format
• New with Fedora 3.0 via ingest/export operations
• 2008: OAI-ORE
• Experiments completed
• Work in progress for Fedora 3.0/3.1 support
• 2008-09: Adopt simple, common Web API(s) with wide appeal
• Atom Publishing Protocol
• SWORD
• Other?
• 2008-09: Connect backend storage to “Cloud”
19. Fedora 2008-09: new Web exposures
New Web
APIs
Fedora
APIs
Registry
Search
RDF
Query
Ingest
Export
Manage
Validate
Access
RDF Index
Store Registry
File system RDBMS
(Registry)
Disseminate
New Web APIs:
Atom Publishing
SWORD
Other TBD
OAI-ORE (2008)
Atom (2008) new formats
Triplestore
SPARQL/Mulgara
Linked Data?
New:
Policy
21. New Akubra Project … backend abstraction
New Web
APIs
Fedora
APIs
Registry
Search
RDF
Query
Store
Akubra
Storage Abstraction
Plug-in 1 Plug-in 2 Plug-in …
File System
Sun Honeycomb
Fedora Repository Service
registry
db
Cloud Storage:
-Amazon S3 (now)
-Google Data (next)
- Other TBD
Other stores TBD…
22. Repositories Not-Disrupted
• Expose repositories in a global networked environment; not
just as local, closed systems
• Make it easier to access and re-use content that is stored in
digital repositories, especially on the Web
• Make repositories conform to common protocols, formats, and
standards that are being used in the Web; get repositories in
the game of emerging value networks
• Provide transformations that enable content to be reusable in
different contexts.
• Create repository connectors for common authoring
applications to position repositories to capture content at
beginning of its life, not at just end of it.
