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Prof. Dr. Harald Sack

Head of Semantic Technologies Group

Professor of Information Service Engineering



  • Prof. Dr. Harald Sack
    Hasso-Plattner-Institut für Softwaresystemtechnik
    Universität Potsdam
    Prof.-Dr.-Helmert-Str. 2-3
    D-14482 Potsdam


  • office: H.1-39
  • phone: +49-331-5509-0
  • email: harald.sack[AT]hpi(.)de
  • my foaf.rdf


  • Harald Sack was working as a Senior Researcher and Head of 'Semantic Technologies' Research Group at HPI, Internet Technologies and Systems Chair. His research interests cover the following topics: 

    •  Semantic Multimedia
    •  Linked Data Engineering and Applications
    •  Semantically enhanced Information Retrieval (Semantic Search)
    •  Knowledge Representations and Ontological Engineering
    •  Multimedia Analysis, Information Extraction and Knowledge Mining
    •  Recommender Systems
    •  Semantically enriched e-Learning Applications

  •  More information about current research in our Semantic Multimedia Research Blog

New Books:


  • Wintersemester 2016/17

    • Knowledge Discovery with Linked Data, seminar, bachelor IT systems engineering, 4SWS
      Tutors: Jörg Waitelonis, Magnus Knuth, Tabea Tietz, Henning Agt-Rickauer


Publications and Professional Activities: 


Research Projects:  


Team Members - Semantic Technologies and Multimedia Retrieval Group:

    Former Coworkers

    • Dr. Olaf Hartig (former PostDoc)
    • M.Sc. Dinesh Reddy (PhD Student)
    • M.Sc. Tamara Bobic (PhD student)
    • M.Sc. Bernhard Quehl (Scientific Coworker)
    • Dr. Haojin Yang (former PhD student)
    • Dr. Nadine Steinmetz (former PhD student)
    • Johannes Osterhoff, M.A. Designer (Scientific Coworker)
    • Joscha Jäger, B.A. Designer (Intern, Scientific Coworker)
    • Johannes Hercher, Diplom Dokumentar (Scientific Coworker)
    • Lina Wolf, Dipl. Inform. (PhD student)
    • Zalan Kramer, Dipl. Inform. (PhD student)
    • M.Sc. Katarina Birghan (PhD student)

    Concluded PhD Theses

    Concluded Master Theses

    Job Offers: 

    • Master-Theses at HPI (or FIZ Karlsruhe / KIT Karlsruhe) with focus on semantic technologies, knowledge discovery, and multimedia retrieval, contact Harald Sack.

    • PhD Position(s) at FIZ Karlsruhe, Leibniz Institute for Information Infrastructure and Karlsruhe Institute of Technology (KIT), with focus on NLP, Semantic Web Technologies, Knowledge Discovery, Visual Analysis, and Data Science. (more information)


    In the media: