Résumé
This is an application paper in which we propose to use an extended version of the conceptual graph framework to represent and reason on expert knowledge for cheese making. In this extension, we propose to use default rules to represent specific pieces of knowledge. We use the CoGui software to manage conceptual graphs in the application from the CTFC data expressed in Freeplan. A specific end user interface has been designed on top of CoGui to ensure that end-user experts in cheese making can use it in a convenient way.