A context modeler models a context representation and a method models a context representation. The context modeler models a context representation in an application. The context is represented in a current situation by at least one context entity that is included in at least one collection of references to a plurality of entities in a database in accordance with the situation. The context modeler includes an activation model for assigning an activation attribute to the at least one context entity indicating the importance of the at least one context entity in the current situation. The context modeler takes into account the activation attribute in modeling the context representation.