Bloopers

Fariz Dararifadirra _a.t_ _d.o.t_ com

@mrlogix

Link to these slides: http://www.slideshare.net/fadirra/dbpedia-bloopers

CC BY - NC - ND

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Bloopers Types

• Redundant Properties• Incorrect Values• Confusing Properties• Different with Corresponding Wiki Pages

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Redundant Properties

• Properties that have the same intended meaning but are expressed differently

• Example: dbpprop:placeOfBurial vs dbpprop:placeofburial

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Redundant Properties (cont.)

http://dbpedia.org/page/Italy (24 Sep 13):

vs

dbpprop:placeOfBurial vs dbpprop:placeofburial

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Redundant Properties (cont.)

http://dbpedia.org/page/Italy (24 Sep 13):

dbpprop:title vs dbpprop:titles

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Redundant Properties (cont.)

http://dbpedia.org/page/Keema (24 Sep 13):

dbpedia-owl:type vs rdf:type

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Incorrect Values

• Good Subject, Good Predicate, Bad Object• Example (http://dbpedia.org/page/Johannesburg -

24 Sep 13):

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Incorrect Values (cont.)

• http://dbpedia.org/page/Indonesia (24 Sep 13):

“Flag of Indonesia.svg” should be an image URI

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Incorrect Values (cont.)

• http://dbpedia.org/page/Indonesia (24 Sep 13):

Not clear why “National ideology: Pancasila” is used as a value for dbpprop:nationalMotto

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Incorrect Values (cont.)

• http://dbpedia.org/page/Coca-Cola_Amatil (24 Sep 13):

Chief_executive_officer is too generalto be a value for keyPerson

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Incorrect Values (cont.)

• http://dbpedia.org/page/Komodo_Airport (24 Sep 13):

Indonesia should not be a city

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Incorrect Values (cont.)

• http://dbpedia.org/page/Stanley_Kubrick (24 Sep 13):

“Jack Nicholson” - Kubrick

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Incorrect Values (cont.)

• http://dbpedia.org/page/Monty_Python (24 Sep 13):

The strings “John Cleese” and “Terry Gilliam” are also its members

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Incorrect Values (cont.)

• http://dbpedia.org/page/Air_France_Flight_1611 (24 Sep 13):

Whereas on its corresponding Wiki page (http://en.wikipedia.org/wiki/Air_France_Flight_1611):

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Incorrect Values (cont.)

• http://dbpedia.org/page/Tom_Cat (24 Sep 13):

Should be clear why it is incorrect :)

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Incorrect Values (cont.)

• http://dbpedia.org/page/Farid_Kamil (24 Sep 13):

Male is an occupation? Nice, can I resign? :)

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Incorrect Values (cont.)

• Example (at http://dbpedia.org/page/Apa_Kata_Hati):*it’s a movie

It’s released on the 29 of [guess the month + year]

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Incorrect Values (cont.)

http://dbpedia.org/data/Apa_Kata_Hati.rdf (24 Sep 13):

http://dbpedia.org/data/Dewa_Cinta.rdf (24 Sep 13):

vs

Is Melayu = Malay? If so, why don’t just use Malay only?

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Confusing Properties

• Some properties are unclear, their intended meaning is not really described.

• Example at http://dbpedia.org/page/Italy - 24 Sep 13:

• What is dbpprop:titlebar? Anybody know?

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Confusing Properties (cont.)

• http://dbpedia.org/page/Italy (24 Sep 13):

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Confusing Properties (cont.)

• http://dbpedia.org/page/Diamond (24 Sep 13):

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Different with Wiki Pages

Wiki pages and their corresponding DBpedia data are sometimes quite different.

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Different with Wiki Pages (cont.)

• http://dbpedia.org/page/Aqua (24 Sep 13):

compared to ...

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Different with Wiki Pages (cont.)

• Wiki page (http://en.wikipedia.org/wiki/Aqua - 24 Sep 13):

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Different with Wiki Pages (cont.)

• http://dbpedia.org/page/Nasi_kebuli (24 Sep 13):

Here the (main) ingredient is only rice

compared to ...

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Different with Wiki Pages (cont.)

• Wiki page (http://en.wikipedia.org/wiki/Nasi_kebuli -

24 Sep 13):

Here the (main) ingredients are at least of three kinds: rice, minyak samin (ghee), and goat meat

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Notes

• DBpedia data is derived from Wikipedia. Consequently, errors on Wikipedia might still exist on DBpedia.

• Perhaps Natural Language techniques can help to improve DBpedia.

• After all, DBpedia is one of the coolest SemWeb applications!

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Credits

• Icons– https://www.iconfinder.com/icons/34248/download/png/128– http://wiki.dbpedia.org/images/dbpedia_logo.png

• dbpedia.org