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J. Hahn:
"A Hilbert space model for concepts and contextual influences to concepts";
Talk: COSIT 2013, Scarborough; 2013-09-02 - 2013-09-06; in: "Doctoral Colloquium", (2013), 6 pages.

Human communication includes implicit knowledge (for example: knowledge that was already shared in preceding conversations, knowledge defined by circumstances) and explicit knowledge. The participants only get the whole meaning of the discussion if both types of knowledge can be extracted. Information systems are unable to react appropriately to language input because of missing implicit knowledge. Here we use concepts to represent explicit knowledge, and contextual data to represent implicit knowledge. The first step is to focus on the process of human concept formation.
Information Systems like GIS that extract implicit knowledge will become more user-friendly, because the user can interact with them using natural language.

Hilbert Space Models, Geographic Concepts, Concepts and Context, Language Interaction, Imprecise Spatial Knowledge