Rijsbergen, C.J. van: Automatic classification in information retrieval (1978)
0.06
0.060381293 = product of:
0.24152517 = sum of:
0.24152517 = weight(_text_:van in 2412) [ClassicSimilarity], result of:
0.24152517 = score(doc=2412,freq=2.0), product of:
0.24500148 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.043933928 = queryNorm
0.98581105 = fieldWeight in 2412, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.125 = fieldNorm(doc=2412)
0.25 = coord(1/4)