Sparck Jones, K.: Automatic keyword classification for information retrieval (1971)
0.01
0.0064166225 = product of:
0.032083113 = sum of:
0.032083113 = weight(_text_:information in 5176) [ClassicSimilarity], result of:
0.032083113 = score(doc=5176,freq=2.0), product of:
0.08270773 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.047114085 = queryNorm
0.38790947 = fieldWeight in 5176, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.15625 = fieldNorm(doc=5176)
0.2 = coord(1/5)
