Barker, A.L.: Non-Boolean searching on commercial online systems : optimising use of Dialog TARGET and ESA/IRS QUESTQUORUM (1995)
0.05
0.05118599 = product of:
0.10237198 = sum of:
0.029222867 = weight(_text_:retrieval in 3853) [ClassicSimilarity], result of:
0.029222867 = score(doc=3853,freq=2.0), product of:
0.124912694 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.041294612 = queryNorm
0.23394634 = fieldWeight in 3853, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.0546875 = fieldNorm(doc=3853)
0.042349376 = weight(_text_:use in 3853) [ClassicSimilarity], result of:
0.042349376 = score(doc=3853,freq=4.0), product of:
0.12644777 = queryWeight, product of:
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.041294612 = queryNorm
0.33491597 = fieldWeight in 3853, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.0620887 = idf(docFreq=5623, maxDocs=44218)
0.0546875 = fieldNorm(doc=3853)
0.013526822 = weight(_text_:of in 3853) [ClassicSimilarity], result of:
0.013526822 = score(doc=3853,freq=6.0), product of:
0.06457475 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.041294612 = queryNorm
0.20947541 = fieldWeight in 3853, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0546875 = fieldNorm(doc=3853)
0.017272921 = product of:
0.034545843 = sum of:
0.034545843 = weight(_text_:on in 3853) [ClassicSimilarity], result of:
0.034545843 = score(doc=3853,freq=10.0), product of:
0.090823986 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.041294612 = queryNorm
0.38036036 = fieldWeight in 3853, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.0546875 = fieldNorm(doc=3853)
0.5 = coord(1/2)
0.5 = coord(4/8)
- Abstract
- Considers 2 non-Boolean searching systems available on commercial online systems. QUESTQUORUM, based on coordination level searching, was introduced by ESA/IRS in Dec. 85. TARGET, which employs partial match probabilistic retrieval was introduced by DIALOG in Dec 93. 6 subject searches were carried out on databases available on both Dialog and ESA/IRS to compare TARGET and QUESTQUORUM with Boolean searching. Outlines the main advantages of these tools, and their disadvantages. Suggests when their use may be preferable
- Source
- Online information 95: Proceedings of the 19th International online information meeting, London, 5-7 December 1995. Ed.: D.I. Raitt u. B. Jeapes