DL-Learner 1.3 (Supervised Structured Machine Learning Framework) Released

Dear all,

the Smart Data Analytics group is happy to announce DL-Learner 1.3.

DL-Learner is a framework containing algorithms for supervised machine learning in RDF and OWL. DL-Learner can use various RDF and OWL serialization formats as well as SPARQL endpoints as input, can connect to most popular OWL reasoners and is easily and flexibly configurable. It extends concepts of Inductive Logic Programming and Relational Learning to the Semantic Web in order to allow powerful data analysis.

Website: http://dl-learner.org
GitHub page: https://github.com/AKSW/DL-Learner
Download: https://github.com/AKSW/DL-Learner/releases
ChangeLog: http://dl-learner.org/development/changelog/

DL-Learner is used for data analysis tasks within other tools such as ORE and RDFUnit. Technically, it uses refinement operator based, pattern-based and evolutionary techniques for learning on structured data. For a practical example, see http://dl-learner.org/community/carcinogenesis/. It also offers a plugin for Protégé, which can give suggestions for axioms to add.

In the current release, we added a large number of new algorithms and features. For instance, DL-Learner supports terminological decision tree learning, it integrates the LEAP and EDGE systems as well as the BUNDLE probabilistic OWL reasoner. We migrated the system to Java 8, Jena 3, OWL API 4.2 and Spring 4.3. We want to point to some related efforts here:

We want to thank everyone who helped to create this release, in particular we want to thank Giuseppe Cota who visited the core developer team and significantly improved DL-Learner. We also acknowledge support by the recently SAKE project, in which DL-Learner will be applied to event analysis in manufacturing use cases, as well as Big Data Europe and HOBBIT projects.

Kind regards,

Lorenz Bühmann, Jens Lehmann, Patrick Westphal and Simon Bin



ESWC Extended Semantic Web Conference 2016 is one of the major venue for discussing the latest scientific results and technologies around semantic technologies. Our members have actively participated in 13th ESWC 2016, which took place in Crete, Greece from May 29th to June 2nd.

e are very pleased to report that:

Two papers from our group were accepted for presentation as full research papers @ESWC16

A Workshop paper

  • DBtrends : Publishing and Benchmarking RDF Ranking Functions by Edgard Marx, Amrapali J. Zaveri, Mofeed Mohammed, Sandro Rautenberg, Jens Lehmann, Axel-Cyrille Ngonga Ngomo and Gong Cheng, SumPre2016 Workshop at ESWC 2016

The workshop Know@LOD was held by Prof. Heiko Paulheim and Prof. Dr. Jens Lehmann. It featured lively discussions on combinations of the Semantic Web and machine learning.

Prof. Jens Lehmann took part in the two day HOBBIT project plenary which started the last day of the ESWC conference. HOBBIT deals with Big Linked Data benchmarks and at the meeting  8 different datasets were discussed along with the HOBBIT benchmarking platform and HOBBIT association. SDA will specifically focus on question answering and faceted browsing benchmarks inside of the project. Already during ESWC, there was a dedicated HOBBIT event in which requirements for benchmarks and the platform were discussed.

ESWC16 was a great venue to meet the community, create new connections, talk about current research challenges, share ideas and settle new collaborations. We look forward to the next ESWC conference.

Until then, meet us at sda.tech !

BDE technical workshop in Athens

The fourth BDE Technical workshop was hosted by NCSR-D in the beautiful and historical city of Athens. The representatives from technical partners enthusiastically attended the workshop.

The purpose of these workshops is to review the emerging technologies, select the ones that best suit the project objectives and determine the upcoming project goals and milestones. For a recap, in the first workshop, we determined the desired features of the BDE platform. In the second workshop we selected the particular technologies from a wide range of Big Data zoo, that would help in achieving the desired features. We reviewed our progress, addressed the challenges and prepared a road map for the future in the third workshop.


CSCUBS is organized by PhD- and MSc-Students and aims to promote research in computer science and scientific exchange among students. The participation of researchers and practitioners of the field is also encouraged.

Papers accepted at ESWC 2016


One paper from our group got accepted for presentations at the 13th Extended Semantic Web Conference (ESWC 2016), held in Heraklion, Crete, Grece. The ESWC is a important international forum for the Semantic Web / Linked Data Community.

AskNow: A Framework for Natural Language Query Formalization in SPARQL  Mohnish Dubey, Sourish Dasgupta, Ankit Sharma, Konrad Höffner and Jens Lehmann

For more information on the conference program and other papers please see here.