Table Recognition

The DIADEM Ontology DIADEM 1.0 Yiyang Bao 2 , Xiaonan Guo 2 , Giorgio Orsi 1,2 , Christian Schallhart 2 , Cheng Wang 2 1 Institute for the Future of Computing University of Oxford 2 Department of Computer Science University of Oxford

The languages of the web ,[object Object],[object Object],[object Object],<html> <head> </head> <body> <title> </title> <div> … </div> </body> </html> ox:Property xsd:string ox:address Real World Web this.value.toLowerCase(); ,[object Object],[object Object]

Why ontology? ,[object Object],ox:Property xsd:string ox:address ox:minPrice ox:partOf ox:priceSegment ,[object Object],[object Object],[object Object]

Why ontology? ,[object Object],[object Object],[object Object]

A logical model for web extraction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The building blocks ,[object Object],[object Object],[object Object],[object Object],<form> < label for="male">Male</label> < input type="radio" name="sex" id="male" /> < label for="female">Female</label> < input type="radio" name="sex" id="female" /> </form> <div> <span> Price: </span> <span> £ 250 </span> </div> Price: £ 250 ,[object Object],[object Object],[object Object],[object Object]

The form model ,[object Object]

The form model ,[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]

The form model: elements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The form model: elements ,[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]

The form model: phenomenology ,[object Object],buyElement(X,F) :- visibleField(X), hasAnnotationFeature (X,"majorType", "reform.label"), hasAnnotationFeature (X,"minorType", "buy"), not hasAnnotationFeature (X,"minorType", "rent"), not hasAnnotationFeature (X,"minorType", "includeSSTC"), group(Ns,_,_,F),#member(X,Ns). radiusElement(X,F) :- visibleField(X), hasAnnotationFeature (X,"majorType","reform.label"), hasAnnotationFeature (X,"minorType","radius"), group(Ns,_,_,F),#member(X,Ns).

The form model: segments ,[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]

The result-page model ,[object Object]

The result-page model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

A Conceptual Model for Data Extraction ,[object Object],[object Object],[object Object]

Linking the domain ontology: OntoX

DIADEM Ontology: discussion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Uncertainty, Vagueness and Inconsistencies

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Uncertainty, Vagueness and Inconsistencies

Table Recognition

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