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Joint Ontolog-OOR Panel: Repository Research Issues Discussion

Explore ontology repository issues, prioritize milestones for tool and content development. Language, granularity, storage, management, semantics, architecture, tools, policy, and scalability discussed. Panelists present positions and engage in open discussion.

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Joint Ontolog-OOR Panel: Repository Research Issues Discussion

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  1. Ontology Repository Research IssuesJoint Ontolog-OOR Panel Discussion Ken Baclawski August 6, 2009 Joint Ontolog-OOR Panel

  2. Purpose and Organization of Session • Discuss longer term ontology repository issues • Identify • Prioritize • Propose milestones • Both tool and content development • Panelists will present their issues/positions • Review of issues raised in Ontology Summit 2008 • Open for discussion Joint Ontolog-OOR Panel

  3. Panelists • Michael Gruninger: Common Logic support • Elisa Kendall: OOR for Public Sector Use • Bart Gajderowicz: Uncertainty for mapping • Mathieu d’Aquin: Ontology Repositories • Katherine Goodier: Socio-cultural awareness • Todd Schneider: Research questions Joint Ontolog-OOR Panel

  4. Granularity Issues • Logical granularity • Unit for import • Context for mapping • Storage granularity • Same as logical granularity? • Unit for mirroring? • Unit for versioning? • Other issues dependent on granularity • Language dependence • Effect of updates to part of a unit • Query and retrieval across single and multiple units Joint Ontolog-OOR Panel

  5. Language Issues • Representation languages: text, XML, frames, graphs, DL, CL, HOL, UML, SQL • When and how will they be supported? • Search languages: text, faceted, SPARQL, ... • When and how will they be supported? • Inter-ontology mapping representation • Initially just sameAs support • When should more complex mappings be supported? Joint Ontolog-OOR Panel

  6. Internal Storage • Storage strategies: triple stores, quad stores • What is the API for the storage component? • Language dependence • Single or multiple internal representations • Can one storage unit have multiple internal representations? • Could this be lossy? Joint Ontolog-OOR Panel

  7. Management Issues • Version management • Configuration management • Provenance and other metadata • See next slide • Metadata validation/authentication • Related to policy issues • Ontology ownership and access control Joint Ontolog-OOR Panel

  8. Semantics of Repository Ontology Annotates Repository Metadata Repository Metadata Repository Metadata Domain Specific Ontology Domain Specific Ontology Domain Specific Ontology Metadata Metadata Metadata Metadata Metadata Metadata Knowledge base Image data set Sensor data set Image data set Sensor data set Knowledge base

  9. Modularization and Mapping • Inter-ontology mapping consistency • Formal definition? • Weaker notions of consistency • Ontology modularization support • Convenience or meaningful • If meaningful what is the semantics? Joint Ontolog-OOR Panel

  10. Architecture Issues • Web service (API) ontologies (including the repository itself as a Web service) • Potential new source of ontologies • Ontology repository as web service registry • Ontology based software engineering • Repository architecture: components and internal APIs • Ontologies for the repository development itself Joint Ontolog-OOR Panel

  11. Tool Support Issues • Inference support • When and how should it be supported? • Ontology editors, pretty printers, visualization tools, differencing tools, explanation tools, summarization tools • Should these be prioritized? • Should it be up to repository instances? Joint Ontolog-OOR Panel

  12. Administration and Policy Issues • Gatekeeping policies and enforcement • Overall policies or left to individual repositories • Policy-making body • When should it be constituted? Joint Ontolog-OOR Panel

  13. Scalability Issues • Scalability goals • Size milestones • Concurrent access milestones • Instance data • See slide 8 Joint Ontolog-OOR Panel

  14. Outreach and Education • Integration with other semantic tools • Semantic wikis • Others? • Education • Documentation is not enough • Community outreach • Meet with representatives of the community • Assist in transition to ontology repositories Joint Ontolog-OOR Panel

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