Lex, W.: ¬A representation of concepts for their computerization (1987)
0.00
0.0011898974 = product of:
0.0071393843 = sum of:
0.0071393843 = weight(_text_:in in 618) [ClassicSimilarity], result of:
0.0071393843 = score(doc=618,freq=2.0), product of:
0.059380736 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.043654136 = queryNorm
0.120230645 = fieldWeight in 618, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.0625 = fieldNorm(doc=618)
0.16666667 = coord(1/6)
- 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 ...