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Developing an Ontology of Ontologies for OOR

Developing an Ontology of Ontologies for OOR. Ontology Summit 2008 April 28-29, 2008 Michael Gruninger and Pat Hayes. Challenge. Identify metadata for ontologies that supports the sharing and reuse of ontologies within open ontology repositories. Ontology Framework.

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Developing an Ontology of Ontologies for OOR

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  1. Developing an Ontology of Ontologies for OOR Ontology Summit 2008 April 28-29, 2008 Michael Gruninger and Pat Hayes

  2. Challenge • Identify metadata for ontologies that supports the sharing and reuse of ontologies within open ontology repositories.

  3. Ontology Framework • The output of last year's Summit was a framework for characterizing the menagerie of artefacts that people refer to as "ontology". The goal was to allow diversity without divergence. • Such a framework should minimally allow us to compare different ontologies along various dimensions. • What are the possible "values" that an ontology can take along a particular dimension? • The description of any ontology in this framework constitutes metadata for the ontology. • To the extent that we have a common shared set of metadata, we have an "Ontology of Ontologies".

  4. Uses of Ontology Metadata • The metadata should allow users to • retrieve ontologies for use in domain applications; • retrieve ontologies to be integrated with other user ontologies; • retrieve ontologies that will be extended to create new user ontologies; • determine whether or not an ontology can be integrated with user ontologies; • determine whether a set of ontologies retrieved from the repository can be used together; • determine whether an ontology in the repository can be partially shared.

  5. Approaches • Logical metadata • logical properties of the ontology independent of any implementation or engineering artefact • Ontology representation language • Modularity • Relationships between ontologies • Engineering metadata • properties of the ontology as considered as an engineering artefact

  6. Keeping Grounded … • Start collecting ontologies from Summit participants, and test out the different proposals for metadata on these ontologies. • Develop scenarios that will motivate the use of the adequacy of proposed metadata • Some existing approaches: • Ontology Metadata Vocabulary (OMV) • http://omv.ontoware.org/ • Ontoselect • http://olp.dfki.de/ontoselect/

  7. Example Scenario • Alice wants to design an ontology to be used to support interoperability of scheduling software systems. • She needs a time ontology, a process ontology, and a resource ontology • She finds several time ontologies (including OWL-Time and Catalog of Temporal Theories), several process ontologies (including PSL), and a folksonomy of machines and materials • What does Alice need to know about these ontologies and their relationships?

  8. Who are the Users? • Ontology designers • Ontology application developers • Ontology infrastructure developers

  9. Some Questions • Suppose that we are considering a particular ontology in the repository. • What is this ontology about? • How has this ontology been used? • Which other ontologies reuse this ontology? • Which other ontologies does this ontology reuse? • What "body of knowledge" was used in the design of the ontology? • What are alternatives to this ontology? • Do there exist implementations of this ontology in different languages? • If so, how are these implementations related to each other?

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