The invention relates to a context modeller for modelling a context representation and a method of modelling a context representation. A context modeller (13) for modelling a context representation (60, 61*) in an application, wherein the context is represented in a current situation (64) by at least one context entity (61f) which is included in at least one collection of references to a plurality of entities (61) in a database (22) in accordance with the situation (64), the context modeller (13) including an activation model (21) for assigning an activation attribute (f, po) to the at least one context entity (61f) indicating the importance of the at least one context entity in the current situation (64), wherein the context modeller (13) takes into account the activation attribute (f, po) in modelling the context representation (60, 61*).
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