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The Orpailleur team is a computer science team based at INRIA Nancy Grand Est / LORIA laboratory in Nancy. The research work of the Orpailleur team may be considered from two main interrelated viewpoints:

  • knowledge discovery and
  • knowledge engineering.

In the team, knowledge discovery is based on classification operations and may be guided by domain knowledge, i.e. a domain ontology used for interpretation and reasoning. Knowledge discovery in databases (KDD) consists in processing large volumes of data in order to extract useful and reusable knowledge units. An expert of the data domain, the analyst, is in charge of guiding the extraction process, w.r.t. his/her objectives and domain knowledge. Moreover, the extracted units are embedded within a representation formalism such as DLs to be used within a knowledge-based system.


GREYC (CNRS UMR 6072) gathers 210 members whose 110 are permanent. Research activities deal with the information science technology domain. GREYC researchers involved in Hybride come from the new team Constraints, Graph and Data Mining of the lab. This team performs research activities in these three core fields, but also seeks for links between them. The researchers of the team have in particular a strong background in pattern discovery and especially in constraint-based mining, in constraint programming and in Natural Language Processing.

MoDyCo Research Center

Originally focused on French linguistics, MoDyCo Research Center is opened to the study of other languages. The thematic unity is characterized by a concern for empirical data which grounds linguistic analyses in robust descriptive bases that include the reality of usage variations, especially those concerning conversation, discourse, and text. This thematic and methodological consistency is supported by the utilization of diversified theories and deliberately diversified approaches in the field of modelling.


The French National Institute of Health and Medical Research (Inserm) is the only french public research institute to focus entirely on human health. 80% of Inserm’s 318 research units are currently set up in university hospitals or cancer research centers. The research campuses of the French National Center for Scientific Research (CNRS), along with the Pasteur and Curie Institutes, also house Inserm research divisions. Lastly, Inserm plays a leading role in creating the European Research Area and boosts its standing abroad through close partnerships.