University of Leipzig AKSW Homepage | Blog |

Archiv für die Kategorie 'dbpedia'

AKSW successful at #ISWC2014

October 28, 2014 - 5:03 pm by Ricardo Usbeck - No comments »

Dear followers, 9 members of AKSW have been participating at the 13th International Semantic Web Conference (ISWC) at Riva del Garda, Italy. Next to listening to interesting talks, giving presentations or discussing with fellow Semantic Web researchers, AKSW won 4 significant prizes:

We do work on way more projects, which you can find at http://aksw.org/projects/. Cheers, Ricardo on behalf of the AKSW group
Best Paper Award

New DBpedia Overview Article

June 24, 2013 - 5:05 pm by Jens Lehmann - No comments »

We are pleased to announce that a new overview article for DBpedia is available.

The article covers several aspects of the DBpedia community project:

  • The DBpedia extraction framework.
  • The mappings wiki as the central structure for maintaining the community-curated DBpedia ontology.
  • Statistics on the multilingual support in DBpedia.
  • DBpedia live synchronisation with Wikipedia.
  • Statistics on the interlinking of DBpedia with other parts of the LOD cloud (incoming and outgoing links).
  • Several usage statistics: What kind of queries are asked against DBpedia and how did that change over the past years? How much traffic do the official static and live endpoint as well as the download server have? What are the most popular DBpedia datasets?
  • A description of use cases and applications of DBpedia in several areas (drop me mail if important applications are missing).
  • The relation of DBpedia to the YAGO, Freebase and WikiData projects.
  • Future challenges for the DBpedia project.

After our ISWC 2009 paper on DBpedia, this is the (long overdue) new reference article for DBpedia, which should provide a good introduction to the project. We submitted the article as a system report to the Semantic Web journal.

Download article as PDF.

Crowd-sourcing the evaluation of Linked Open Data with TripleCheckMate

January 28, 2013 - 3:11 pm by DimitrisKontokostas - No comments »

On November 16th, 2012 the DBpedia Data Quality group started a campaign for assessing the quality of DBpedia. To get the best of this effort we developed TripleCheckMate, a tool designed for crowd-sourcing the evaluation of Linked Data. Today, we are happy to announce that TripleCheckMate has been released as an open-source software (under Apache 2.0 Licence) and the code can be accessed from Github. Although the DBpedia quality evaluation campaign is now over, you can still watch a screencast of the tool here.

Some highlights of TripleCheckMate are:

  • The Google Oauth2 provider for authentication: this not only prevents spam but also helps keeping track of the users’ evaluations.
  • Multiple types of resource selection: completely random, random resource that belongs to a specific class, or manual (with SPARQL-Enabled auto-complete)
  • An easy-to-use user interface
  • An incorporated (but configurable) error classification scheme
  • Inter-rater agreements: new or already evaluated resources are assigned to users with a probability of 50%, which allows the measurement of inter-rater agreements

The tool was developed in Java, using the Google Web Toolkit framework as a front-end and a minimal back-end with Tomcat and MySQL. Future version of this tool will allow further configurations and include an embedded H2 database inside the war file for easier deployment.

Please send us your feedback either through the DBpedia mailing list or our google-group.

DBpedia Data Quality Evaluation Campaign

November 16, 2012 - 12:54 pm by AmrapaliZaveri - 3 comments »
As we all know, DBpedia is an important dataset in Linked Data as it is not only connected to and from numerous other datasets, but it also is relied upon for useful information. However, quality problems are inherent in DBpedia be it in terms of incorrectly extracted values or datatype problems since it contains information extracted from crowd-sourced content.

However, not all the data quality problems are automatically detectable. Thus, we aim at crowd-sourcing the quality assessment of the dataset. In order to perform this assessment, we have developed a tool whereby a user can evaluate a random resource by analyzing each triple individually and store the results. Therefore, we would like to request you to help us by using the tool and evaluating a minimum of 3 resources. Here is the link to the tool: http://nl.dbpedia.org:8080/TripleCheckMate/, which also includes details on how to use it.

In order to thank you for your contributions, a lucky winner will win either a Samsung Galaxy Tab 2 or an Amazon voucher worth 300 Euro. So, go ahead, start evaluating now !! Deadline for submitting your evaluations is 9th December, 2012.

If you have any questions or comments, please do not hesitate to contact us at dbpedia-data-quality@googlegroups.com.

Thank you very much for your time.

Regards,
DBpedia Data Quality Evaluation Team.
https://groups.google.com/d/forum/dbpedia-data-quality

Open Innovation Conference, 28th-30th November 2012, Leipzig

November 1, 2012 - 3:10 pm by SandraPraetor - No comments »

The first Open Innovation Conference organized by the city of Leipzig brings together experts from the fields of the triple helix “university, industry, government” focusing on the exchange of experience in the field of open innovation in creative industries.

One session at the conference is dedicated to Open Data, which will be discussed  from two different but complementary perspectives: the Linked Open Data research perspective and the perspective on Open Data from the community, grassroots and NGO perspective.The session will comprise two talks, give room to short stand-up presentations by the participants and aim at spinning a discussion around Open Data challenges.

  • Dr. Sören Auer will give a presentation on DBpedia and the emerging Web of Data .
  • Daniel Dietrich, chairman of  Open Knowledge Foundation Germany, will present some crucial Open Data projects, such as Offener Haushalt, TheDataHub und Frankfurt Gestalten.

The conference takes place within the framework of the EU-project Creative Cities (January 2010 to May 2013) final convention. Eleven partners from Germany, Poland, Slovenia, Hungary, and Italy joined together in 2010 within the project to form a transnational network of the creative industries in the participating cities. The final convention brings together representatives of the project partners, the creative industries, administration, economy, and politics in order to evaluate results, exchange experiences, and define future fields of work.

The conference language is English and participation is free.

  • please register here
  • information on how to get there, please follow link