Ideas coming from possibilistic logic have led to propose a new approach to the treatment of uncertainty in databases, where only what is somewhat certain is represented. Besides, the idea of possibilistic functional dependency has led to extend classical database schema design methods to databases having uncertain tuples. A functional dependency is then all the more certain as it fails only on tuples that are very dubious. These works were jointly developed respectively with IRISA in Lannion and with the University of Auckland.


  • Olivier Pivert, Henri Prade. A certainty-based model for uncertain databases. IEEE Trans. Fuzzy Systems 23(4): 1181-1196 (2015)
  • Sebastian Link, Henri Prade. Possibilistic functional dependencies and their relationship to possibility theory. IEEE Trans. Fuzzy Systems 24(3): 757-763 (2016)
  • Sebastian Link, Henri Prade. Relational database schema design for uncertain data. Inf. Syst. 84: 88-110 (2019)