-
Fidel, R.: Writing abstracts for free-text searching (1986)
0.01
0.009093732 = product of:
0.036374927 = sum of:
0.036374927 = product of:
0.1454997 = sum of:
0.1454997 = weight(_text_:editors in 684) [ClassicSimilarity], result of:
0.1454997 = score(doc=684,freq=2.0), product of:
0.24520668 = queryWeight, product of:
6.7132807 = idf(docFreq=145, maxDocs=44218)
0.03652561 = queryNorm
0.5933758 = fieldWeight in 684, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.7132807 = idf(docFreq=145, maxDocs=44218)
0.0625 = fieldNorm(doc=684)
0.25 = coord(1/4)
0.25 = coord(1/4)
- Abstract
- A survey of abstracting policies by producers of bibliographical databases examined abstracting guidelines which aim to enhance free- text retrieval. Of the 123 database policies examined, fifty-seven (46 per cent) included such instructions. Editors consider contents of abstracts and their language as a primary factor in retrieval enhancement. Most recommend that once abstractors decide which concepts to include in abstracts and in which form to represent them, these terms should be co-ordinated with index terms assigned from a controlled vocabulary. Guidelines about the type of abstracts, i.e., informative or indicative, and about their length are not affected by the capability of free-text retrieval
-
Wellisch, H.H.: Indexing and abstracting 1977-1981 : an international bibliography (1984)
0.01
0.00759848 = product of:
0.03039392 = sum of:
0.03039392 = product of:
0.06078784 = sum of:
0.06078784 = weight(_text_:b in 1453) [ClassicSimilarity], result of:
0.06078784 = score(doc=1453,freq=2.0), product of:
0.12940885 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.03652561 = queryNorm
0.46973482 = fieldWeight in 1453, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.09375 = fieldNorm(doc=1453)
0.5 = coord(1/2)
0.25 = coord(1/4)
- Type
- b
-
Endres-Niggemeyer, B.: Content analysis : a special case of text compression (1989)
0.01
0.0063320673 = product of:
0.02532827 = sum of:
0.02532827 = product of:
0.05065654 = sum of:
0.05065654 = weight(_text_:b in 3549) [ClassicSimilarity], result of:
0.05065654 = score(doc=3549,freq=2.0), product of:
0.12940885 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.03652561 = queryNorm
0.3914457 = fieldWeight in 3549, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.078125 = fieldNorm(doc=3549)
0.5 = coord(1/2)
0.25 = coord(1/4)
-
Palais, E.S.: Abstracting for reference librarians (1988)
0.00
0.004948716 = product of:
0.019794865 = sum of:
0.019794865 = product of:
0.03958973 = sum of:
0.03958973 = weight(_text_:22 in 2832) [ClassicSimilarity], result of:
0.03958973 = score(doc=2832,freq=2.0), product of:
0.12790647 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03652561 = queryNorm
0.30952093 = fieldWeight in 2832, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=2832)
0.5 = coord(1/2)
0.25 = coord(1/4)
- Source
- Reference librarian. 1988, no.22, S.297-308