Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Ontology Building Process: The Wine Domain João Graça, Márcio.

Apresentação em tema: "Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Ontology Building Process: The Wine Domain João Graça, Márcio."— Transcrição da apresentação:

1 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Ontology Building Process: The Wine Domain João Graça, Márcio Mourão, Orlando Anunciação, Pedro Monteiro, H. Sofia Pinto, and Virgílio Loureiro

2 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Summary Context Ontology Wine Domain Existing Wine Ontologies Ontology Building Process –Knowledge acquisition –Conceptualization –Evaluation –Formalization Future work

3 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Context Project for a Post-Graduate Course –Building an Ontology Team –4 students from Artificial Intelligence area Theoretical knowledge No prior practical experience

4 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Ontology What is an ontology –Concepts of a domain represented as: Classes - collection of individuals Instances – individuals –Concepts are hierarchically organized subclass, instance-of –Other domain dependent relations produced-in, producer, produced-by

5 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Wine Domain Type classified according to three main dimensions –Wine making process White, Rosé and Red –Grape maturity state –Fermentation process

6 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Wine Classification –Wine dimensions Wine type (process, maturity, fermentation) –Grape variety –Harvesting year –Producer –Region Classification System –European: Defines requirements for a wine –Rest of the World: Producer asserts the quality of the wine Characteristics –Measurable: alcohol percentage, tannin level and degree of acidity –Ambiguous: vision, aroma and flavor

7 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Existing Wine Ontologies Noy and McGuinness, 2001 –Mismatches between concepts and relations acquired and represented Ex: Dessert Wines –Lack of restrictions Red wine with white grapes is possible Conclusion –A new ontology to be built from scratch

8 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Ontology Building Process Knowledge Acquisition Conceptualization Evaluation Formalization

9 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Knowledge Acquisition First Stage –Sources: Books and Internet Unstructured information Different definitions for the same concept –Result A glossary A general view about the domain Second Stage –Found a Wine Domain Expert Structured interviews

10 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Conceptualization (first stage) Conceptual model based on First Stage –Brainstorming into a Blackboard –Attempt to create a model from concepts –General Conceptual Model

11 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Conceptualization (second stage) First stage conceptual model evaluated by the Expert –Introduction of abstract concepts –Removal of very specific concepts –New simpler conceptual model Covers about 90% of the Domain

12 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Formalization OntoEdit –Proprietary tool –Beta Tester Program Concepts –Classes & Instances Relations between concepts –Attribute values of classes were restricted Impossible to create a red wine with only white grapes Impossible to assign a French region to a Portuguese wine

13 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Results OntoEdit has a built in Inference Engine: Ontobroker –Queries represented in F-Logic: –Auxiliar predicate: FORALL Wine,Year, GrapeVariety hasGrapeVarietyYear(Wine,Year, GrapeVariety) <- Wine:#Wine[#hasYear»Year], Wine[#hasGrapeVariety ‑ » GrapeVariety]. - Query – Select all grapes that were used in wines from the year 2001 FORALL Wine,GrapeVariety <- hasGrapeVarietyYear (Vinho,2001,Casta). WineGrapeVariety Quinta de Roriz Tinto Reserva 2001Touriga Nacional Quinta de Roriz Tinto Reserva 2001Tinta Roriz Quinta do Cotto Tinto 2001Touriga Nacional

14 Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento em Lisboa Future Work Refine the ontology Wine advisory system –Dialogue system Increase the knowledge base