The volume of stored data increases rapidly. Therefore, the battery of extracted association heavily prohibits the better support of the decision maker. In this context, backboned on the Formal Concept Analysis, we propose to extend the notion of Formal Concept through the generalization of the notion of item set aiming to consider the item set as an intent, its support as the cardinality of the extent. Accordingly, we propose a new approach to extract interesting item sets through the concept coverage. This approach uses an original quality-criterion of a rule namely the profit improving the classical formal concept analysis through the addition of semantic value in order to extract meaningful association rules.

{"references": ["R. Wille. Restructuring Lattice Theory : an Approach Based on Hierarchies of Concepts. In Proc. Symposium on Ordered Sets, pp.445-470, Dordrecht-Boston: reidel, 1982.", "Ganter B., Wille R., Formal Concept Analysis: Mathematical Foundations, Edition: Springer, Heidelberg-Berlin-New York, 1999"]}