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OCKHAM: Fostering DL Interoperability through Reference Models and Lightweight Protocol Networks

OCKHAM: Fostering DL Interoperability through Reference Models and Lightweight Protocol Networks. Martin Halbert Emory University Director for Library Systems Indo-US Workshop on Open Digital Libraries and Interoperability Monday, June 23, 2003 Washington, D.C. Summary. What is OCKHAM?

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OCKHAM: Fostering DL Interoperability through Reference Models and Lightweight Protocol Networks

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  1. OCKHAM:Fostering DL Interoperability through Reference Models and Lightweight Protocol Networks Martin Halbert Emory University Director for Library Systems Indo-US Workshop on Open Digital Libraries and Interoperability Monday, June 23, 2003 Washington, D.C.

  2. Summary • What is OCKHAM? • DL Coordination Trends Examined • Intersection of Reference Models & Lightweight Protocols • OCKHAM Process • Proposed Experiments OCKHAM Presentation

  3. What is OCKHAM? • A working group sponsored by the Digital Library Federation of CLIR to seek: • Generalizable and practical solutions for collaborative digital library development • An architecture or framework within which such solutions can be implemented, shared, and discussed Acronym: Open Components-Based Knowledge Hypermedia Administration Management. Intentional allusion to William of Ockham OCKHAM Presentation

  4. OCKHAM Participants • Librarians (incl Emory, Arizona, Notre Dame, Windsor, California Digital Library, etc.) • DL Researchers (incl Virginia Tech) • Vendors (incl OCLC) • DLF Director OCKHAM Presentation

  5. Major Issues • The problem is not a lack of good DL architectures (already too many!) • Nor a search for the uber-archictecture (forget that!) • The need is for better strategies to undertake collaborative development bridging DL projects • OCKHAM is as much about collaborative process as DL architectures OCKHAM Presentation

  6. Typical DL Architecture OCKHAM Presentation

  7. Peer-to-Peer Frameworks are needed for the future OCKHAM Presentation

  8. Effective DL Collaboration Strategies • Reference Models (examples of CCSDS OAIS, UKOLN DNER) • Lightweight Protocols (examples of Open Archives Initiative PMH, LDAP, others) • (Assumed) good project management processes (articulated by PMI) OCKHAM Presentation

  9. Benefits of having a Reference Model • Technical recommendation for use in developing a broader consensus on what is required for collaboration • Establishes a common framework of terms, concepts, and entities • Does not provide implementation specifications, just gets the group to a point of effective discussion quickly OCKHAM Presentation

  10. OAIS Architecture (Overview) OCKHAM Presentation

  11. Benefits of Lightweight Protocols • Quicker to implement than full-featured interoperability protocols • Imply the pre-existence of a reference model guiding the specification • Usually modular and minimal in scope • Most successful recent example is the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) OCKHAM Presentation

  12. Generalizable OCKHAM Process • Identify the DL Community and the Need (Opportunity to be realized) • Develop Reference Model(s) to coordinate discussions • Identify lightweight protocols (preferably pre-existing) to implement the Ref Models • Iteratively refine development targets OCKHAM Presentation

  13. Next Steps • Potential experiments with OCKHAM Process • AmericanSouth.Org • NSDL OCKHAM Library Network • (Possible) DLF DODL OCKHAM Presentation

  14. AmericanSouth.Org Now Currently a classic centralized OAI metadata harvesting infrastructure AmericanSouth.Org OCKHAM Presentation

  15. AmericanSouth.Org IIFostering OAI Connections Kentucky Virtual Library UNC Chapel Hill DL Alabama Cornerstone Project AmericanSouth.Org Florida Lib Autom Center OCKHAM Presentation

  16. NSDL OCKHAM Library Network • Mediates NSDL and traditional libraries • Provides a set of services to participant libraries to deploy NSDL content and services NSDL OCKHAM Presentation

  17. DLF Distributed Open Digital Library (DODL) • New project just proposed by DLF Steering Committee, scope of project still under discussion • Intended to provide capability for researchers to manipulate DL objects held by member libraries in multiple ways OCKHAM Presentation

  18. Conclusion • OCKHAM is an effort to foster improved DL interoperability through combination of best practices for process and standards • One attempt to bridge DL communities (among many) OCKHAM Presentation

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