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Wille, R.: Line diagrams of hierarchical concept systems (1984)
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Wille, R.: Geometric representations of concept lattices (1989)
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Wille, R.: Lattices in data analysis : how to draw them with a computer (1989)
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Ganter, B.; Stahl, J.; Wille, R.: Conceptual measurement and many-valued contexts (1986)
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Ganter, B.; Wille, R.: Conceptual scaling (1989)
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Wille, R.: Knowledge acquisition by methods of formal concept analysis (1989)
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Lex, W.: ¬A representation of concepts for their computerization (1987)
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- Abstract
- A lattice theoretical description of concept hierarchies is developed using for attributes the terms "given", "negated", "open" and "impossible" as the truth-values of a four-valued logic. Similar to the theory of B. Ganter and R. Wille so does this framework permit a precise representation of the usual interdependences in a field of related concepts - such as superconcepts, subconcept, contrary concepts etc. -, whenever the concepts under consideration can be sufficiently described by the presence or absence of certain attributes ...