Dimitris Kontokostas

Dimitris Kontokostas
Depiction of Dimitris Kontokostas
Address Work
Hainstraße 11, 04109 Leipzig
Email Office
Fax Work
+49-341-97-32329

@GitHub @Google Scholar @Google+

I am a member of the Agile Knowledge Engineering and Semantic Web (AKSW) Research Group, in pursue of a PhD with a focus on Data Quality, DBpedia and Libraries.

In 2012 I started my PhD studies in the area of Semantic Web, funded by the Dutch national library organization (bibliotheek.nl). Part of my duties were to bootstrap, create and maintain the Dutch DBpedia (nl.dbpedia.org) with the aim to become a hub in the local Dutch LOD cloud. Besides DBpedia, my research focused on Linked Data quality. Along my research publications, I created RDFUnit, an innovative R&D framework for Unit-Testing RDF data that was successfully applied and tested on large scale RDF datasets (e.g. DBpedia, LCSH, LGD, Datos) and integrated in service validation stacks (e.g. NLP2RDF, DataID). RDFUnit is a research & work in progress with the aim to improve it's TRL.

I have been heavily involved in DBpedia, where in 2009 bootstrapped and co-lead the DBpedia Internationalization process. This lead in increasing the coverage of the DBpedia extraction framework to many languages and the the creation of the DBpedia internationalization committee. I created and maintained the Greek and Dutch DBpedia chapters. Since 2013 I took over DBpedia Live where I re-wrote and modularized the core live extraction framework. In addition I am one of the lead developers of the DBpedia Extraction Framework and assist in the coordination of the DBpedia (developer) community.

Since 2013 I lead the efforts of applying DBpedia as a GSoC organization and successfully coordinated many students and mentors in completing their projects. Some of the successfully GSoC projects that I mentored myself include the an Error DBpedia browser, the new DBpedia LD interface, Wikidata2DBpedia integration, porting the DBpedia extraction framework to Hadoop / Spark, extracting rich metadata from Wikimedia Commons.

In March 2014, we finally created a legal entity for DBpedia ( DBpedia Association ) where my active role is to coordinate the next technical directions of the project.

In addition, you can see my

Current Projects

  • ALIGNEDAligned, Quality-centric Software and Data Engineering
  • DBpediaQuerying Wikipedia like a Semantic Database
  • DBpediaDQUser-driven quality evaluation of DBpedia
  • DBpediaDQCrowdCrowdsourcing DBpedia Quality Assessment
  • RDFUnitan RDF Unit-Testing suite
  • TripleCheckMateCrowdsourcing the evaluation of Linked Data

Publications

by (Editors: ) [BibTex of ]

News

DL-Learner 1.2 (Supervised Structured Machine Learning Framework) Released ( 2016-02-09T16:19:55+01:00 by Patrick Westphal)

2016-02-09T16:19:55+01:00 by Patrick Westphal

Dear all, we are happy to announce DL-Learner 1.2. DL-Learner is a framework containing algorithms for supervised machine learning in RDF and OWL. Read more about "DL-Learner 1.2 (Supervised Structured Machine Learning Framework) Released"

AKSW Colloquium, 01.02.2016, Co-evolution of RDF Datasets ( 2016-02-01T15:53:23+01:00 by Natanael Arndt)

2016-02-01T15:53:23+01:00 by Natanael Arndt

At the todays colloquium, Natanael Arndt will discuss the the paper “Co-evolution of RDF Dataset” by Sidra Faisal, Kemele M. Endris, Saeedeh Shekarpour and Sören Auer (2016, available on arXiv) Link: http://arxiv.org/abs/1601. Read more about "AKSW Colloquium, 01.02.2016, Co-evolution of RDF Datasets"

Holographic Embeddings of Knowledge Graphs ( 2016-02-01T14:32:03+01:00 by Johannes Frey)

2016-02-01T14:32:03+01:00 by Johannes Frey

During the upcoming colloquium, Nilesh Chakraborty will give a short introduction on factorising RDF tensors and present a paper on “Holographic Embeddings of Knowledge Graphs”: Holographic Embeddings of Knowledge Graphs Authors: Maximilian Nickel, Lorenzo Rosasco, Tomaso Poggio Abstract: Learning embeddings … Continue reading → Read more about "Holographic Embeddings of Knowledge Graphs"

AKSW Colloquium, 25.01.2016, LargeRDFBench and Introduction To The Docker Ecosystem ( 2016-01-25T14:39:49+01:00 by Ivan Ermilov)

2016-01-25T14:39:49+01:00 by Ivan Ermilov

On the upcoming colloquium, Muhammad Saleem will present his paper “LargeRDFBench: A Billion Triples Benchmark for SPARQL Endpoint Federation” about the benchmarking of federated SPARQL endpoints. The other talk will be an introduction to the Docker ecosystem by Tim Ermilov. Read more about "AKSW Colloquium, 25.01.2016, LargeRDFBench and Introduction To The Docker Ecosystem"

HOBBIT project kick-off ( 2016-01-22T14:52:43+01:00 Sandra Bartsch)

2016-01-22T14:52:43+01:00 Sandra Bartsch

HOBBIT, a new InfAI project within the EU’s “Horizon 2020″ framework program kicked-off in Luxembourg on 18 and 19 january in 2016. Read more about "HOBBIT project kick-off"