Dubois, C.P.R.: Free text vs. controlled vocabulary; a reassessment (1987)
0.06
0.061409935 = product of:
0.12281987 = sum of:
0.057846278 = weight(_text_:retrieval in 2048) [ClassicSimilarity], result of:
0.057846278 = score(doc=2048,freq=6.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.46309367 = fieldWeight in 2048, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0625 = fieldNorm(doc=2048)
0.03422346 = weight(_text_:use in 2048) [ClassicSimilarity], result of:
0.03422346 = score(doc=2048,freq=2.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.27065295 = fieldWeight in 2048, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0625 = fieldNorm(doc=2048)
0.0154592255 = weight(_text_:of in 2048) [ClassicSimilarity], result of:
0.0154592255 = score(doc=2048,freq=6.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.23940048 = fieldWeight in 2048, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=2048)
0.015290912 = product of:
0.030581824 = sum of:
0.030581824 = weight(_text_:on in 2048) [ClassicSimilarity], result of:
0.030581824 = score(doc=2048,freq=6.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.33671528 = fieldWeight in 2048, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0625 = fieldNorm(doc=2048)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- Free text and controlled vocabulary searching can no longer be viewed as antagonistic techniques in information retrieval since they both display advantages and weaknesses dependent on a fairly wide range of context, with the option to use both increasingly favoured. An attempt is made to present a list of features associated with the two techniques and to suggest a methodology to assist in deciding on the optimal retrieval technique for a particular purpose. The relevance of the techniques in expert systems and full text contexts is also discussed. Finally, recommendations for further research are suggested, concentrating on survey techniques in real-life retrieval situations
