AKSW Roster

Dr. Sören Auer (head)
Thorsten Berger
Sebastian Dietzold
Sebastian Hellmann
Norman Heino
Jens Lehmann
Michael Martin
Axel C. Ngonga Ngomo
Thomas Riechert
Jörg Unbehauen

Sebastian Hellmann

Sebastian Hellmann

Johannisgasse 26, Zimmer 5-10
Leipzig

Tel.:		+49 341 97 32273
E-Mail

Contents

Supervision of final theses

Work in progress

Research Interests

extraction / reuse of knowledge
database2owl conversion
automatic training set composition for concept learning
ontology modularization
scalability in the Web of Data
light-weight ontology engineering methods.

Projects

DL-Learner – is a tool for learning concepts in Description Logics (DLs) from user-provided examples. Equivalently, it can be used to learn classes in OWL ontologies from selected objects. The goal of DL-Learner is to support knowledge engineers in constructing knowledge and learning about the data they created.
xOperator – combines advantages of social network websites with instant messaging. It tries to be a semantic agent for xmpp / jabber network which finds and shares content about resources (using RDF/SPARQL) for you and your jabber friends.

Publications

Sören Auer, Sebastian Dietzold, Jens Lehmann, Sebastian Hellmann, David Aumueller
Triplify – Lightweight Linked Data Publication from Relational Databases, accepted at WWW2009.

Sebastian Hellmann, Jens Lehmann, Sören Auer
Learning of OWL Class Descriptions on Very Large Knowledge Bases, International Journal On Semantic Web and Information Systems, 2009, Special Issue on Scalability.

Hellmann, S.; Lehmann J.; Auer, S.
Poster: Learning of OWL Class Descriptions on Very Large Knowledge Bases, 7th International Semantic Web Conference (ISWC), 2008 PDF Document Link

Hellmann, S.
Diploma Thesis: Comparison of Concept Learning Algorithms With Emphasis on Ontology Engineering for the Semantic Web (2008). PDF Document Link

Dietzold, S.; Hellmann S.; Peklo, M.
Using Java Script RDFa Widgets for model/view separation inside read/write websites. SFSW2008