Andre Valdestilhas, Natanael Arndt and Dimitris Kontokostas

AKSW

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Topics

1. Problem statement2. Contributions and representation of the idea 3. Results4. Related work5. Conclusion and Future works

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Problem statementHeterogeneity

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4

Redirect

Identifier

owl:sameAs

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● 10,35 % (transitive/redirect).

Contributions and Representation of the idea

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1. Reduction of the identifier heterogeneity problem.

2. A GUI where the user is able to evaluate the links, also suggesting a new link to be rated.

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http://rdf.freebase.com/ns/m.015fr

http://dbpedia.org/resource/Bresilhttp://dbpedia.org/resource/Brzilhttp://dbpedia.org/resource/Brazilhttp://dbpedia/resource/...

http://dbpedia.org/resource/Brazil

URITransitive/Redirect

Links DUI

Service on the webcurl http://service...

DBpediaLink

Repository

DBpediaSameAs Service

DBpediaLink Rate

Uses

Redirect Feedback

Relation of the contribution

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DBpedia EndPoint

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freebase

PURL.org

bbc.co.uk

Methodology and Workflow

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Download triple files

DataBase Importing

Service on the web implementation

GUI and Link Rate implementation

FreebasePURL.org

bbc.co.uk

...

Redirect / transitive Links

Link Rate suggestions

curl http://service...

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Results

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Transitive / Redirect Links

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Usability

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The results of all 10 questions gives us a score of 32.71 (at a scale of 0 − 40) which is a SUS score of 32.71 × 2.5 ≈ 82. This indicates a high level of usability.

Sum(values): 24,27,30,39,38,35,36Total interviewed: 7Average: 32.71429Standard deviation: 5.76525Variance(Standard deviation): 33.2381

(SUS) http://www.measuringu.com/sus.php, [M. Saleem et. al]

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Related works

SameAs.org

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Link rate and Quality● User-driven quality evaluation of dbpedia. [A. Zaveri et al]

○ Data quality assessment methodology in DBpedia.○ Manual and semi-automatic process.

● Interlinking: Performance assessment of user evaluation vs. supervised learning approaches. [M. Hassan et al]○ Validation of links and a dubbed manual validation.○ An experiment to investigate the effect of user intervention in dataset

interlinking on small knowledge bases.

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Conclusion and Future works

Overall - Summary of the whole work

> Basically 3 steps:

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Import Normalize Rate

Treatment of transitive and redirect links

Several results to an unique

DBpedia identifier

Quality and statistics for the links

Future works

● A study about the results of link rating. ○ Is needed to wait for a period of usage of the

DBpediaSameAs and then the results can be used for a new work.

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Information1. DBpediaSameAs “live”:

http://dbpsa.aksw.org/SameAsService/2. The code is available at: https://github.

com/firmao/DBPediaLinkSameAs.git3. Usability questions:

http://goo.gl/forms/JKeQysx2az

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Special thanks

Sebastian Hellmann, Markus Ackerman, Ivan Ermilov, Diego Esteves, Diego Mousallen, Sandro Rautenberg, Saleen, Anrapali, Johannes, Sheriff, Edgard Marx, Ciro Baron Neto.

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Thanks :)