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Dr. Michael Schmidt
Institut für Informatik
Albert-Ludwigs-Universität Freiburg
Georges-Köhler-Allee, Geb. 51
79110 Freiburg i. Br., Germany

Email:   Michael Schmidt

Since January 2015 I am working as CTO for metaphacts GmbH, leading the development of our Semantic Technologies product portfolio. This web page is still maintained and will be updated frequently, providing a reference to my academic activities.
Short CV
Please download my full CV for a detailed listing of my academic and industrial activities (somewhat outdated though).
Research Interests and Selected Projects
  • XML Databases and XML Stream Processing (see the GCX XQuery Engine)
  • SPARQL Query Language and Constraints in RDF (see my PhD thesis for the most central results)
  • SPARQL Benchmarking (see the SP²Bench SPARQL Performance Benchmark)
  • Federated Semantic Data Processing (see the FedX and FedBench projects)
  • Semantic Query Optimization, Constraints, and Chase
  • eLearning, Social Learning, MOOCs
Publications
Please refer to my Google Scholar Profile for citation counts and metrics.

Papers marked with * have been published under affiliation different than those from University of Freiburg.
  • 2015
    • Enabling Enterprise Knowledge Graphs with Wikidata*
          P. Haase, M. Schmidt, B. Bebee, B. Thompson, M. Personick
          In 14th International Semantic Web Conference (ISWC 2015), Industry Track. Bethlehem, Pennsylvania (USA).
    • RDF Constraint Checking* [ .pdf ]
          P. M. Fischer, G. Lausen, A. Schätzle, M. Schmidt
          In Proc. 5th Intl Workshop on Linked Web Data Management (LWDM 2015). Brussels (Belgium).
  • 2014
    • RDF Data Descriptions* [ .pdf ]
          G. Lausen, M. Schmidt
          In Proc. 8th Alberto Mendelzon Workshop (AMW 2014). Cartagena de Indias (Colombia).
    • Assessing and Training Social Media Skills in Vocational Education supported by TEL Instruments* [ .pdf ]
          U. Schwertel, Y. Kammerer, C. Oloff, P. Gerjets, M. Schmidt
          In ECTEL 2014, Poster, Graz (Austria).
    • The Social Navigator: A Personalized Learning Platform for Social Media Education* [ .pdf ]
          M. Schmidt, U. Schwertel, C. Di Valentin, A. Emrich, D. Werth
          In ECTEL 2014, Poster, Graz (Austria).
    • Durchblick - A Conference Assistance System for Augmented Reality Devices* [ .pdf ]
          A. Alzoghbi, P. Fischer, A. Gossen, P. Haase, T. Hornung, B. Hu, G. Lausen, C. Pinkel, M. Schmidt
          In ESWC 2014, Poster, Crete (Greece).
    • Adaptive Recommendations to foster Social Media Skills in Teaching and Learning Scenarios* [ .pdf ]
          C. Di Valentin, A. Emrich, J. Lahann, M. Schmidt, U. Schwertel, D. Werth, P. Loos
          In IKNOW 2014, Short Paper, Graz (Austria).
    • Design, Implementierung und Anwendungsfälle einer Corporate MOOC Software Suite* [ .pdf ]
          D. Dahrendorf, K. Freitag, Ma. Schmidt, Mi. Schmidt, U. Schwertel, N. Faltin, V. Zimmermann
          In DeLFI 2014, Freiburg (Germany).
    • A Social and Personalized Learning Platform for Vocational Social Media Education* [ .pdf ]
          M. Schmidt, C. Di Valentin, A. Emrich, U. Schwertel, C. Oloff, Y. Kammerer
          In MKWI 2014, Paderborn (Germany).
  • 2013
    • Editing R2RML Mappings Made Easy* [ .pdf ]
          K. Sengupta, P. Haase, M. Schmidt, P. Hitzler
          In ISWC Poster & Demo Track 2013, Sydney (Australia).
    • Optique 1.0: Semantic Access to Big Data; The Case of Norwegian Petroleum Directorate's FactPages* [ .pdf ]
          E. Kharlamov, M. Giese, E. Jimenez-Ruiz, M. Skjaeveland, A. Soylu, D. Zheleznyakov, T. Bagosi, M. Console, P. Haase, I. Horrocks, S. Marciuska, C. Pinkel, M. Rodriguez-Muro, M. Ruzzi, K. Sengupta, M. Schmidt, E. Thorstensen, J. Trame, A. Waaler
          In ISWC Poster & Demo Track 2013, Sydney (Australia).
    • Pleasantly Consuming Linked Data with RDF Data Descriptions* [ .pdf | Tech. Report ]
          Michael Schmidt, Georg Lausen
          In COLD Workshop 2013, Sydney (Australia).
    • Towards Query Formulation and Query-Driven Ontology Extensions in OBDA Systems* [ .pdf ]
          B. Grau, M. Giese, I. Horrocks, T. Hubauer, E. Jimenez-Ruiz, E. Kharlamov, M. Schmidt, A. Soylu and D. Zheleznyakov
          In OWLED Workshop 2013, Montpellier (France).
    • Optique: Towards OBDA Systems for Industry* [ .pdf ]
           E. Kharlamov1, E. Jimenez-Ruiz, D. Zheleznyakov1, D. Bilidas, M. Giese, P. Haase, I. Horrocks, H. Kllapi, M. Koubarakis, Ö. Özcep, M. Rodriguez-Muro, R. Rosati, M. Schmidt, R. Schlatte, A. Soylu, A. Waaler
          In ESWC Post Proceedings 2013, Montpellier (France).
    • The Optique Project: Towards OBDA Systems for Industry (Short Paper)* [ .pdf ]
          D. Calvanese, M. Giese, P. Haase, I. Horrocks, T. Hubauer, Y. Ioannidis, E. Jimenez-Ruiz, E. Kharlamov, H. Kllapi, J. Klüwer, M. Koubarakis, S. Lamparter, R. M&oum;ller, C. Neuenstadt, T. Nordtveit, Ö. Özcep, M. Rodriguez-Muro, M. Roshchin, M. Ruzzi, F. Savo, M. Schmidt, A. Soylu, A. Waaler, D. Zheleznyakov
          In OWLED Workshop 2013, Montpellier (France).
    • Scalable End-user Access to Big Data*
          M. Giese, D. Calvanese, P. Haase, I. Horrocks, Y. Ioannidis, H. Kllapi, M. Koubarakis, M. Lenzerini, R. Möller, O. Ozcep, M. Rodriguez-Muro, R. Rosati, R. Schlatte, M. Schmidt, A. Soylu, A. Waaler
          Book chapter in Big Data Computing, Florida: Chapman and Hall/CRC.
    • Semantic Query Optimization in the Presence of Types [ ACM ]
          Michael Meier, Michael Schmidt, Fang Wei, Georg Lausen
          In Journal of Computer and System Sciences (JCSS), 2013.
  • 2012
    • An Experience Report of Large Scale Federations* [ .pdf ]
          Andreas Schwarte, Peter Haase, Michael Schmidt, Katja Hose, Ralf Schenkel
          Technical Report. arXiv:1210.5403, 2012.
    • The Information Workbench as a Self-service Platform for Developing Linked Data Applications* [ .pdf ]
          Peter Haase, Christian Hütter, Michael Schmidt, Andreas Schwarte
          Developers Track. In Proc. WWW 2012, Lyon (France).
    • GovWILD: Integrating Open Government Data for Transparency* [ .pdf ]
          Christoph Böhm, Markus Freitag, Arvid Heise, Claudia Lehmann, Andrina Mascher, Felix Naumann, Vuk Ercegovac, Mauricio Hernandez, Peter Haase, Michael Schmidt
          Demo Paper. In Proc. WWW 2012, Lyon (France).
  • 2011
    • The Information Workbench as a Self-service Platform for Linked Data Applications* [ .pdf ]
          Peter Haase, Michael Schmidt, Andreas Schwarte
          In 2nd Intl. Workshop on Consuming Linked Data (COLD), 2011, Bonn (Germany).
    • FedBench: A Benchmark Suite for Federated Semantic Data Query Processing* [ .pdf ]
          Michael Schmidt, Olaf Görlitz, Peter Haase, Günter Ladwig, Andreas Schwarte, Thanh Tran
          In Proc. ISWC 2011, Bonn (Germany).
    • FedX: Optimization Techniques for Federated Query Processing on Linked Data* [ .pdf ]
          Andreas Schwarte, Peter Haase, Katja Hose, Ralf Schenkel, Michael Schmidt
          In Proc. ISWC 2011, Bonn (Germany).
    • A-R-E: The Author-Review-Execute Environment* [ .pdf ]
          Wolfgang Müller, Isabel Rojas, Andreas Eberhart, Peter Haase, Michael Schmidt
          In Procedia Computer Science 4 (2011).
    • FedX: A Federation Layer for Distributed Query Processing on Linked Open Data* [ .pdf ]
          Andreas Schwarte, Peter Haase, Katja Hose, Ralf Schenkel, Michael Schmidt
          Demo Paper. In Proc. ESWC 2011, Heraklion (Greece).
  • 2010
    • Semantic Technologies for Enterprise Cloud Management* [ .pdf ]
          Peter Haase, Tobias Mathäß, Michael Schmidt, Andreas Eberhart, Ulrich Walther
          In Proc. ISWC 2010, Shanghai (China).
    • Semantic Query Optimization in the Presence of Types [ .pdf ]
          Michael Meier, Michael Schmidt, Fang Wei, Georg Lausen
          In Proc. PODS 2010, Indiana (USA).
    • Foundations of SPARQL Query Optimization [ .pdf ]
          Michael Schmidt, Michael Meier, Georg Lausen
          In Proc. ICDT 2010, Lausanne (Switzerland).
    • Foundations of SPARQL Query Optimization [ .pdf ]
          Michael Schmidt
          PhD Thesis, Albert-Ludwigs-Universität Freiburg (Germany).
  • 2009
    • On Chase Termination Beyond Stratification [ Tech. Report ]
          Michael Meier, Michael Schmidt, Georg Lausen
          In Proc. VLDB 2009, Lyon (France).
    • Stop the Chase [ Extended Abstract | Tech. Report ]
          Michael Meier, Michael Schmidt, Georg Lausen
          In Proc. Alberto Mendelzon Workshop 2009, Arequipa (Peru).
    • SP²Bench: A SPARQL Performance Benchmark
          Michael Schmidt, Thomas Hornung, Michael Meier, Christoph Pinkel, Georg Lausen
          Book Chapter in Semantic Web Information Management, Springer 2009, p. 371-393.
    • SP²Bench: A SPARQL Performance Benchmark [ .pdf | Tech. Report ]
          Michael Schmidt, Thomas Hornung, Georg Lausen, Christoph Pinkel
          In Proc. ICDE 2009, Shanghai (China).
  • 2008
    • An Experimental Comparison of RDF Data Management Approaches in a SPARQL Benchmark Scenario [ .pdf ]
          Michael Schmidt, Thomas Hornung, Norbert Küchlin, Georg Lausen, Christoph Pinkel
          In Proc. ISWC 2008, Karlsruhe (Germany).
    • SPARQLing Constraints for RDF [ .pdf ]
          Georg Lausen, Michael Meier, Michael Schmidt
          In Proc. EDBT 2008, Nantes (France).
    • XML Prefiltering as a String Matching Problem [ .pdf | additional benchmarks ]
          Christoph Koch, Stefanie Scherzinger, Michael Schmidt
          In Proc. ICDE 2008, Cancún (México).
  • 2007
    • The GCX System: Dynamic Buffer Minimization in Streaming XQuery Evaluation [ .pdf ]
          Stefanie Scherzinger, Christoph Koch, Michael Schmidt
          Demo Paper. In Proc. VLDB 2007, Vienna (Austria).
    • Combined Static and Dynamic Analysis for Effective Buffer Minimization in Streaming XQuery Evaluation [ .pdf ]
          Michael Schmidt, Stefanie Scherzinger, Christoph Koch
          In Proc. ICDE 2007, Istanbul (Turkey).
Selected Talks
Talks marked with * have been given under affiliation different than those from University of Freiburg.
  • A Social and Personalized Learning Platform for Vocational Social Media Education* [ .pdf ]
    February 26, 2014, MKWI 2014, Paderborn (Germany). Joint talk with Christina Di Valentin from DFKI Saarbrücken.
  • Optique - Enabling End User Access to Big Data in the Oil & Gas Industry* [ .pdf ]
    June 13, 2013. European Digital Oilfield Summit, Vienna (Austria). Joint talk with Johan W. Klüwer from DNV.
  • A Semantic Approach to Cloud Infrastructure Management at Freudenberg IT* [ .pdf ]
    June 3, 2013. SemTech Business, San Francisco (USA). Joint talk with Timo Weber from Freudenberg IT.
  • Transformation of Enterprise Data Islands Into Linked and Living Knowledge* [ .pdf ]
    June 5, 2012. SemTech Business, San Francisco (USA). Joint talk with Yefim Zhuk from SLM.
  • Semantic Technologies for Enterprise Cloud Management* [slideshare]
    November 11, 2010. ISWC, Shanghai (China).
  • Cloud-based Linked Data Management for Self-service Application Development* [slideshare]
    November 6, 2010. Intl. Workshop on Scalable Semantic Computing, Hangzhou (China).
  • Foundations of SPARQL Query Optimization [ .pdf ]
    March 23, 2010. ICDT, Lausanne (Switzerland).
  • Foundations of SPARQL Query Optimization [ .pdf ]
    Dec 22, 2009. Disputation Talk, Freiburg (Germany).
  • Stop the Chase [ .pdf ]
    May 12, 2009. Alberto Mendelzon Workshop on Foundations of Data Management, Arequipa (Peru).
  • SP²Bench - A SPARQL Performance Benchmark [ .pdf ]
    March 30, 2009. ICDE, Shanghai (China).
  • An Experimental Analysis of RDF Data Management Approaches in a SPARQL Benchmark Scenario [ .pdf ]
    October 28, 2008. ISWC, Karlsruhe (Germany).
  • Optimization Approaches for SPARQL and Storage Schemes for RDF - An Experimental Analysis [ .pdf ]
    September 12, 2008. Abschlusskolloquium Graduiertenkolleg 806/03, Freiburg (Germany).
  • XML Prefiltering as a String Matching Problem [ .ppt ]
    April 9, 2008. ICDE, Cancún (México).
  • SPARQLing Constraints for RDF [ .ppt ]
    March 28, 2008. EDBT, Nantes (France).
  • SPARQLing Constraints for RDF [ .ppt ]
    March 20, 2008. Invited Talk, LMU Munich (Germany), Lehrstuhl Programmier- und Modellierungssprachen.
  • Combined Static and Dynamic Analysis for Effective Buffer Minimization in Streaming XQuery Evaluation [ .ppt ]
    April 17, 2007. ICDE, Istanbul (Turkey).
  • Efficient Evaluation of XQuery over Streaming XML Data [ .ppt (german) ]
    November 5, 2007. Albert-Ludiwgs-Universität Freiburg, Kolloquium des Graduiertenkollegs "Mathematische Logik und Anwendungen".
Teaching
Reviews and Programm Committee
  • PC member:
    PAKDD'09, ISWC'09, KICSS'10, EON Workshop'10, SSW Workshop'11+'12+'13, AAAI'13, ISWC'13+'14+'15, DESWeb '14
  • Conferences (external review): EDBT'08, ER'10, ESWC'08+'09+'11+'12+'13, ISWC'08+'10+'14+'15, ODBASE'07, SLE'10, VLDB'08
  • Journals (external review):
    • ACM Computing Surveys
    • DKE (Data & Knowledge Engineering)
    • IPL (Information Processing Letters)
    • IS (Information Systems)
    • JWS (Journal of Web Semantics)
    • SWJ (Semantic Web Journal)
    • The VLDB Journal
    • TKDE (IEEE Transactions on Knowledge and Data Engineering)
    • TOIT (ACM Transactions on Internet Technology)
Metrics
My Erdös number is at most 4: C. Koch - A. J. Demers - R. L. Lewis - P. Erdös. My h-index is currently 15 and my i10-index is 19 (according to my Google Scholar Profile).
Last updated: October 25, 2015