1 / 16

DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSIS

DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSIS. Introduction. Motivation Database analysis Ontologies addressed Philosophical notion ‘a systematic account of existence’ Upper ontologies provide definition for general-purpose concepts Domain ontologies

luann
Télécharger la présentation

DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSIS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. DOMAIN ONTOLOGIES:A DATABASE-ORIENTED ANALYSIS

  2. Introduction DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • Motivation • Database analysis • Ontologies addressed • Philosophical notion • ‘a systematic account of existence’ • Upper ontologies • provide definition for general-purpose concepts • Domain ontologies • tied to a specific universe of discourse

  3. Outline • Notion of ontology • Ontology usage • Taxonomy • Applications DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • Introduction • Analysis of the notion of domain ontology • Usage of domain ontologies • Taxonomy of domain ontologies • Applications • Conclusion

  4. Current definitions • Notion of ontology • Ontology usage • Taxonomy • Applications DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • T. Gruber definition • Free On-Line Dictionary Of Computing ‘an explicit specification of a conceptualization’ [Gruber 93] ‘an explicit formal specification of how to represent the objects, concepts and other entities that are assumed to exist in some area of interest and the relationships that hold among them’ [FOLDOC 06] ? ? Lives at

  5. 3 criteria of domain ontologies • Notion of ontology • Ontology usage • Taxonomy • Applications DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • Formal • Reasoning • Consistency • Consensual • Cover a wide range of applications • Gene / product ontologies • Capability to be referenced (concepts dictionary) • Identifier for each concept • Independent of any environment

  6. Proposition of a new definition of domain ontologies • Notion of ontology • Ontology usage • Taxonomy • Applications DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • Entity • Anything that exist in the domain: a formal model of domain semantics • Dictionary Symbol1 -> Formal definition Symbol2 -> Formal definition Symbol3 -> Formal definition Symbol4 -> Formal definition Symbol5 -> Formal definition ‘a formal and consensualdictionary of categories and properties of entities of a domain and the relationships that hold among them’

  7. Domain ontologies vs other modelling artefact • Notion of ontology • Ontology usage • Taxonomy • Applications DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • Conceptual / Knowledge representation model • formal – consensual – capability to be referenced • Exchange format • formal – consensual – capability to be referenced

  8. Usage of ontologies • Notion of ontology • Ontology usage • Taxonomy • Applications DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • Specification • Software - Database design • Data exchange • Global vs local structure • Data integration • Database – Semantic Web – Natural language approaches • Data access and search • Browsing - querying

  9. Fundamentals of ontologies • Notion of ontology • Ontology usage • Taxonomy • Applications DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • Primitive concepts • May include necessary condition • Result from some levels of choice • Defined concepts • Include necessary and sufficient conditions ‘for which we are not able to give a complete axiomatic definition’ [Gruber 93] ‘for which the ontology provides a complete axiomatic definition by means of necessary and sufficient conditions expressed in terms of other concepts’

  10. Canonical Conceptual Ontology (CCO) • Notion of ontology • Ontology usage • Taxonomy • Applications DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • Definition of a canonical vocabulary CCO Lives at • Reference for Semantic Integration • Access at the knowledge level • Canonical vocabulary for exchange

  11. NCCO .... DL Derivation functions F-Logic Non Canonical Conceptual Ontology (NCCO) • Notion of ontology • Ontology usage • Taxonomy • Applications DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • Definition of a equivalence CCO Lives at • Extends inference capability • Improve flexibility and expressivity for semantic integration

  12. LO NCCO CCO .... DL Derivation functions F-Logic Linguistic Ontology (LO) • Notion of ontology • Ontology usage • Taxonomy • Applications DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • Support of human languages Lives at • Natural language support • Linguistic inference Addresses of persons living in France Adresses de personnes vivant en France

  13. The onion model • Notion of ontology • Ontology usage • Taxonomy • Applications DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • Domain specific view of domain ontologies • CCO – data processing community • NCCO – artificial intelligence community • LO – computational linguistic community • Complementarities between them • CCO – canonical semantics of a domain • NCCO – extensive semantics of a domain • LO – natural language support • Thus, the onion model LO NCCO CCO

  14. Application 1: design of a domain ontology • Notion of ontology • Ontology usage • Taxonomy • Applications DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • Agreement on a CCO • What is the domain covered? • Choice of the primitive concepts • Define them precisely (context, unit …) • Each member may extend it to a NCCO • Define its own view of the domain • Defined LO on top of this NCCO • Provide (multilingual) natural language support Example : ISO 13584-compliant (PLIB) product ontologies (www.plib.ensma.fr)

  15. NCCO CCO Applications 2: Exchange of data • Notion of ontology • Ontology usage • Taxonomy • Applications DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • Exchange data on a CCO • Represent other points of views with NCCO operators • Use a LO to provide natural language support CCO CCO NCCO 1 CCO NCCO 2 LO +++

  16. Conclusion and future work DOMAIN ONTOLOGIES: A DATABASE-ORIENTED ANALYSISStéphane Jean –Session 5 Web Interfaces and Applications WEBIST’06, Setubal April 12, 2006 • A domain ontology • Formal – consensual – capability to be referenced • Currently • Three category of domain ontology (CCO-NCCO-LO) • Proposition • Layered ontology • Future work • Exchange format and tools for layered ontology ‘a formal and consensual dictionary of categories and properties of entities of a domain and the relationships that hold among them’

More Related