• 1986-1987: Jubiläumsfonds-project entitled: Extension of Database Systems by a Logic-oriented Control Component, funded by the City of Vienna
• 1986-1988: Jubiläumsfonds-project entitled: A Logic-oriented Database Management System under Prolog, funded by the Österreichische Nationalbank under contract no. 2791.
• July 1990-October 1992: Interoperability of Autonomous Database Systems, funded by the Austrian FWF (Fonds zur Förderung der wissenschaftlichen Forschung) under contract no. P7773-PHY.
• December 1992-December 1994: Multidatabase Transaction Processing, funded by the Austrian FWF (Fonds zur Förderung der wissenschaftlichen Forschung) in cooperation with the NSF (National Science Foundation) under contract no. P9020-PHY. Partners in the USA, Purdue University, Indiana: Prof. Ahmed K. Elmagarmid, Prof. Omran Bukhres.
• February 1994-February 1995: Continuation contract of the project entitled: Multidatabase Transaction Processing, funded by the Austrian FWF (Fonds zur Förderung der wissenschaftlichen Forschung) under contract no. P09020-MAT.
• 1995-1997 Cooperation project with partners from Hungary, entitled Large Scale Distributed Artificial Intelligence Applications, funded by the Bureau for Exchange Programs with Middle and Eastern Europe of the Austrian Academic Exchange Service, contract no. 22ö7. Partner: Prof. Peter Kacsuk, KFKI-Research Institute for Measurement and Computing Techniques, Budapest, Hugary.
• 1996-1999: ESPRIT IV Multi Media Pilot Project entitled VHF A Virtual Hypermedia Factory, with cooperation partners from 4 countries (including industry, academy, and users): Austria: Graphische Sammlung Albertina, and Architekturstiftung Österreich. France: Maison des Sciences de l'Homme, and INALCO-CERPEM. Greece: Intrasoft, First Informatics, Travel Plan, and University of Patras. Italy: Olivetti Ricerca, Soprintendenza Archeologica di Napoli e Caserta, Liguori Editore, Associazione degli Albergatori Napoletani, and Consiglio Nazionale delle Ricerche.
• 2005-2007: Triple Space Computing (TSC) project, funded by the Austrian Federal Ministry for Transport.
• 2006-2009: Triple Space Communication (TripCom) project, funded by the European Commission, 6th Framework Programme.
• 2006-2007: System-wide Information Distribution System (SWIS) project, funded by the company FREQUENTIS.

• 1985-1989: Participation in the project Design and Implementation of an Integrated Prolog Programming System (VIP Vienna Integrated Prolog), funded by the Austrian Government (Bundesministerium für Wissenschaft und Forschung).
• 1985-1986: Participation in the Jubiläumsfondsproject Software Development System based on Logic Programming Languages, funded by the City of Vienna.
• 1994-1995: Joint project proposal and supervision of a project entitled Speicherbereinigung für eine parallele Programmiersprache, funded by the City of Vienna (Jubiläumsfonds).