The basics of ontologies

The Basics of Ontologies Nordic Agricultural Ontology Service (AOS) Workshop Royal Veterinary and Agricultural University Copenhagen, Denmark February 28, 2003 Frehiwot Fisseha Frehiwot.Fisseha@fao.org

What this talk is all about ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],The Origin of Ontology

What is Ontology? (1) ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],What is Ontology? (2)

What is Ontology?(3) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

World without ontology = Ambiguity Example (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

World without ontology = Ambiguity Example (2) ,[object Object],[object Object],[object Object]

Motivation (1) ,[object Object],[object Object],[object Object],[object Object]

Motivation (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Motivation (3) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example: Car-Ad Ontology Year Price Make Mileage Model Feature PhoneNr Extension Car has has has has is for has has has 1..* 0..1 1..* 1..* 1..* 1..* 1..* 1..* 0..1 0..1 0..1 0..1 0..1 0..1 0..* 1..* Graphical Car [0:1] has Year [1:*]; Year {regexp[2]: “{2} : ’{2}, … }; Car [0:1] has Make [1:*]; Make {regexp[10]: “chev”, “chevy”, … }; Car [0:1] has Model [1:*]; Model {…}; Car [0:1] has Mileage [1:*]; Mileage {regexp[8] “[1-9]{1,2}k”, “ 1-9]?,{3} : [^][1-9]?,{3}[^]” } {context: “miles”, “mi”, “mi”}; Car [0:*] has Feature [1:*]; Feature {regexp[20]: -- Colors “ aqua+metallic”, “beige”, … -- Transmission “ (5|6)*spd”, “auto : auto(|,)”, -- Accessories “ roof+rack”, “spoiler”, … ... Textual

Example: People Ontology http://www.sciam.com/article.cfm?articleid=0005DE0B-2C93-1CBF-B4A8809EC588EEDF

Benefits of Ontology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Application Areas of Ontologies

Types of Ontologies ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Complexity of Ontologies ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Thesauri and Ontology Similarities ,[object Object],[object Object],[object Object],[object Object],[object Object]

Thesauri and Ontology Differences ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],Reasons to evolve thesauri to ontologies

Problems with Thesaurus Modelling BT/NT relations-AGROVOC ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Problems with Thesaurus Modelling Equivalence relations – UF, USE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Problems with Thesaurus Modelling Associative relations- RT ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RT in AGROVOC ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Thesauri and Ontology how to migrate ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Things to keep in mind....

Conclusion ,[object Object],[object Object],[object Object],[object Object],[object Object]

Thank you for your attention ! Any questions, comments?

The basics of ontologies

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The basics of ontologies