Demystifying Ontology<br />International UDC Seminar 2011 “Classification & Ontology:<br />Formal Approaches and Access to...
Agenda<br />Introduction<br />What is Ontology?<br />Ontology Spectra<br />Ontology Gamut<br />Conclusion <br />Q & A Disc...
19 September 2011<br />3<br />Classification & Ontology, The Hague, Netherlands<br />Introduction<br />This talk is aimed ...
19 September 2011<br />4<br />Classification & Ontology, The Hague, Netherlands<br />Introduction<br />A cool ontology!<br />
19 September 2011<br />5<br />Classification & Ontology, The Hague, Netherlands<br />What is Ontology (or ontology)?<br />...
19 September 2011<br />6<br />Classification & Ontology, The Hague, Netherlands<br />What is Ontology (or ontology)?<br />...
19 September 2011<br />7<br />Classification & Ontology, The Hague, Netherlands<br />What is Ontology (or ontology)?<br />...
19 September 2011<br />8<br />Classification & Ontology, The Hague, Netherlands<br />What is Ontology (or ontology)?<br />...
19 September 2011<br />9<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Spectra<br />Ontology spectr...
Ontology spectrum based on formal structure<br />adapted from (McGuinness, 2003)<br />19 September 2011<br />10<br />Class...
Ontology spectrum based on formal complexity<br />adopted from (Smith & Welty, 2001)<br />19 September 2011<br />11<br />C...
Ontology spectrum based on formality<br />adopted from (Guarino, Oberle & Staab, 2009)<br />19 September 2011<br />12<br /...
19 September 2011<br />13<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Spectra<br />“A set of axio...
19 September 2011<br />14<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Gamut<br />Each spectra und...
19 September 2011<br />15<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Gamut<br />
19 September 2011<br />16<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Gamut<br />What do these di...
19 September 2011<br />17<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Gamut<br /> This gamut can ...
19 September 2011<br />18<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Gamut<br />To what extent w...
Demystifying Ontology<br />International UDC Seminar 2011 “Classification & Ontology:<br />Formal Approaches and Access to...
Upcoming SlideShare
Loading in...5
×

Demystifying Ontologies

609

Published on

Presentation in Ontology and Classification: Formal Approaches and Access to Knowledge, The Hague, September 2011

Published in: Education, Spiritual
0 Comments
2 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
609
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
24
Comments
0
Likes
2
Embeds 0
No embeds

No notes for slide
  • specification/precisionAd hoc structures hardly has any semantics
  • Boundary Object: This is an analytic concept of those scientific objects which both inhabit severalIntersecting social worlds and satisfy the informational requirements of each of them. Boundaryobjects are objects which are both plastic enough to adapt to local needs and the constraints of the several parties employing them, yet robust enough to maintain a common identity across sites. They are weakly structured in common use, and become strongly structured in individual site use. These objects may be abstract or concrete.They have different meanings in different social worlds but their structure is common enough to more than one world to make them recognizable, a means of translation. The creation and management of boundary objects is a key process in developing and maintaining coherence across intersecting social worlds.Star, S. L., &amp; Griesemer, J. R. (1989). Institutional Ecology, `Translations’ and Boundary Objects: Amateurs and Professionals in Berkeley’s Museum of Vertebrate Zoology, 1907-39. Social Studies of Science, 19(3), 387 -420. doi:10.1177/030631289019003001
  • Demystifying Ontologies

    1. 1. Demystifying Ontology<br />International UDC Seminar 2011 “Classification & Ontology:<br />Formal Approaches and Access to Knowledge”<br />19 Sept 2011<br />Emad Khazraee, Drexel University<br />Xia Lin, Drexel University<br />
    2. 2. Agenda<br />Introduction<br />What is Ontology?<br />Ontology Spectra<br />Ontology Gamut<br />Conclusion <br />Q & A Discussion<br />19 September 2011<br />2<br />Classification & Ontology, The Hague, Netherlands<br />
    3. 3. 19 September 2011<br />3<br />Classification & Ontology, The Hague, Netherlands<br />Introduction<br />This talk is aimed to be a motivation for a discussion <br />The term “ontology” is used in different communities multifariously<br />Scientific practice needs communication and cooperation<br />Ontologies as a “Boundary Objects”<br />
    4. 4. 19 September 2011<br />4<br />Classification & Ontology, The Hague, Netherlands<br />Introduction<br />A cool ontology!<br />
    5. 5. 19 September 2011<br />5<br />Classification & Ontology, The Hague, Netherlands<br />What is Ontology (or ontology)?<br />Metaphysics, first philosophy<br />Ontos and logos (being and word)<br />Early 17th century<br />Jacob Lorhard<br />Rudolf Göckel<br />Formal ontology used by Husserl in Logical Investigation. Formal vs Formalized!!<br />In 1980’s it emerged in computer & information community<br />
    6. 6. 19 September 2011<br />6<br />Classification & Ontology, The Hague, Netherlands<br />What is Ontology (or ontology)?<br />Ontology as a discipline (“O”)<br />The attempt to answer the question of “what is, of the kinds and structures of objects, properties, events, processes and relations” (Smith & Welty)<br />Definitive and exhaustive classification<br />Ontology as artifact (“o”)<br />An knowledge engineering artifact<br />Designed for a purpose ,<br />Enable knowledge modeling,<br />Uses a formal language<br />
    7. 7. 19 September 2011<br />7<br />Classification & Ontology, The Hague, Netherlands<br />What is Ontology (or ontology)?<br />Formal in two senses:<br /> First, deals with general categories such as thing, process, and matter— and deploys these categories to codify what exists <br />the use of symbolism in a deductive system <br />Formal ontology and formalized ontology<br />ontology-as-categorial-analysis (ontology_c) and ontology-as-technology (ontology_t) (Poli & Obrst) <br />
    8. 8. 19 September 2011<br />8<br />Classification & Ontology, The Hague, Netherlands<br />What is Ontology (or ontology)?<br />“A formal specification of a conceptualization” <br /> (Gruber,1993) <br />Kinds and Structures as categories<br />A set of terms or vocabulary can be structured to form a hierarchy or lattice <br />“A dictionary of terms formulated in a canonical syntax and with commonly accepted definitions designed to yield a lexical framework for knowledge-representation which can be shared by different communities” (Smith, 2003) <br />Definitions and a supporting framework of axioms. <br />
    9. 9. 19 September 2011<br />9<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Spectra<br />Ontology spectrum based on formal semantics<br />Adapted from (Daconta, Obrst & Smith, 2003)<br />
    10. 10. Ontology spectrum based on formal structure<br />adapted from (McGuinness, 2003)<br />19 September 2011<br />10<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Spectra<br />
    11. 11. Ontology spectrum based on formal complexity<br />adopted from (Smith & Welty, 2001)<br />19 September 2011<br />11<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Spectra<br />
    12. 12. Ontology spectrum based on formality<br />adopted from (Guarino, Oberle & Staab, 2009)<br />19 September 2011<br />12<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Spectra<br />
    13. 13. 19 September 2011<br />13<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Spectra<br />“A set of axioms, i.e. a logical theory designed to capture the intended models corresponding to a certain conceptualization and to exclude unintended ones” (Guarino, Oberle & Staab)<br />“An ontology is a formal theory within which not only definitions but also a supporting framework of axioms is included” (Smith)<br />
    14. 14. 19 September 2011<br />14<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Gamut<br />Each spectra underline one dimension<br />Degree of semantics, expressivity, formality and complexity<br />Semantic richness<br />They are not necessarily positively correlated<br />We propose to use two dimensions to have a better description (degree of formalization and semantic richness)<br />Why not three?<br />
    15. 15. 19 September 2011<br />15<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Gamut<br />
    16. 16. 19 September 2011<br />16<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Gamut<br />What do these dimensions mean?<br />Difference in semantic richness and semantic specification (clearly refer to something)<br />Three ontology families<br /> Main community of users of each family<br />Audience of each family<br />
    17. 17. 19 September 2011<br />17<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Gamut<br /> This gamut can be considered as a clan of knowledge engineering artifacts<br />This clan consists of three families of ontologies which have relations and shared interest<br />Ontology as a discipline can be seen as the neighboring community<br />Mutual benefits of this neighborhood<br />
    18. 18. 19 September 2011<br />18<br />Classification & Ontology, The Hague, Netherlands<br />Ontology Gamut<br />To what extent we can specify these two dimensions to be used operationally?<br />How can we use ontologies as boundary objects?<br />Boundary objects have different meanings in different social worlds but their structure is common enough to more than one world to make them recognizable, a means of translation. The creation and management of boundary objects is a key process in developing and maintaining coherence across intersecting social worlds.<br />(Star, & Griesemer, 1989)<br />
    19. 19. Demystifying Ontology<br />International UDC Seminar 2011 “Classification & Ontology:<br />Formal Approaches and Access to Knowledge”<br />19 Sept 2011<br />Thank You<br />Questions & Discussion?<br />emad@drexel.edu<br />xlin@drexel.edu<br />
    1. A particular slide catching your eye?

      Clipping is a handy way to collect important slides you want to go back to later.

    ×