Document (#20639)

Author

Braam, R.R.
Bruil, J.

Title

Quality of indexing information : authors' views on indexing of their articles in chemical abstracts online CA-file

Source

Journal of information science. 18(1992) no.5, S.399-408

Year

1992

Abstract

Studies the quality of subject indexing by Chemical Abstracts Indexing Service by confronting authors with the particular indexing terms attributed to their computer, for 270 articles published in 54 journals, 5 articles out of each journal. Responses (80%) indicate the superior quality of keywords, both as content descriptors and as retrieval tools. Author judgements on these 2 different aspects do not always converge, however. CAS's indexing policy to cover only 'new' aspects is reflected in author's judgements that index lists are somewhat incomplete, in particular in the case of thesaurus terms (index headings). The large effort expanded by CAS in maintaining and using a subject thesuaurs, in order to select valid index headings, as compared to quick and cheap keyword postings, does not lead to clear superior quality of thesaurus terms for document description nor in retrieval. Some 20% of papers were not placed in 'proper' CA main section, according to authors. As concerns the use of indexing data by third parties, in bibliometrics, users should be aware of the indexing policies behind the data, in order to prevent invalid interpretations

Theme

Indexierungsstudien

Field

Chemie

Object

Chemical Abstracts

Similar documents (content)

1. Neuhaus, C.; Marx, W.; Daniel, H.-W.: ¬The publication and citation impact profiles of Angewandte Chemie and the Journal of the American Chemical Society based on the sections of Chemical Abstracts : a case study on the limitations of the Journal Impact Factor (2009) 0.17

   0.16721101 = sum of:
     0.16721101 = product of:
       0.59718215 = sum of:
         0.01946662 = weight(abstract_txt:subject in 2707) [ClassicSimilarity], result of:
           0.01946662 = score(doc=2707,freq=1.0), product of:
             0.07971959 = queryWeight, product of:
               1.0344577 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.019724537 = queryNorm
             0.24418867 = fieldWeight in 2707, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.0625 = fieldNorm(doc=2707)
         0.044623606 = weight(abstract_txt:headings in 2707) [ClassicSimilarity], result of:
           0.044623606 = score(doc=2707,freq=1.0), product of:
             0.13859507 = queryWeight, product of:
               1.3639678 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.019724537 = queryNorm
             0.3219711 = fieldWeight in 2707, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.0625 = fieldNorm(doc=2707)
         0.119902536 = weight(abstract_txt:abstracts in 2707) [ClassicSimilarity], result of:
           0.119902536 = score(doc=2707,freq=3.0), product of:
             0.18573047 = queryWeight, product of:
               1.5789624 = boost
               5.963546 = idf(docFreq=308, maxDocs=44218)
               0.019724537 = queryNorm
             0.6455728 = fieldWeight in 2707, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.963546 = idf(docFreq=308, maxDocs=44218)
               0.0625 = fieldNorm(doc=2707)
         0.045787908 = weight(abstract_txt:terms in 2707) [ClassicSimilarity], result of:
           0.045787908 = score(doc=2707,freq=2.0), product of:
             0.1281029 = queryWeight, product of:
               1.6060362 = boost
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.019724537 = queryNorm
             0.3574307 = fieldWeight in 2707, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.0625 = fieldNorm(doc=2707)
         0.26141977 = weight(abstract_txt:chemical in 2707) [ClassicSimilarity], result of:
           0.26141977 = score(doc=2707,freq=5.0), product of:
             0.26339465 = queryWeight, product of:
               1.8803284 = boost
               7.1017675 = idf(docFreq=98, maxDocs=44218)
               0.019724537 = queryNorm
             0.9925022 = fieldWeight in 2707, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               7.1017675 = idf(docFreq=98, maxDocs=44218)
               0.0625 = fieldNorm(doc=2707)
         0.052437034 = weight(abstract_txt:index in 2707) [ClassicSimilarity], result of:
           0.052437034 = score(doc=2707,freq=1.0), product of:
             0.17666906 = queryWeight, product of:
               1.8860626 = boost
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.019724537 = queryNorm
             0.29680938 = fieldWeight in 2707, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.0625 = fieldNorm(doc=2707)
         0.053544722 = weight(abstract_txt:articles in 2707) [ClassicSimilarity], result of:
           0.053544722 = score(doc=2707,freq=1.0), product of:
             0.17914838 = queryWeight, product of:
               1.8992507 = boost
               4.7821565 = idf(docFreq=1006, maxDocs=44218)
               0.019724537 = queryNorm
             0.29888478 = fieldWeight in 2707, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7821565 = idf(docFreq=1006, maxDocs=44218)
               0.0625 = fieldNorm(doc=2707)
       0.28 = coord(7/25)
   

2. Diodato, V.P.: Author indexing (1981) 0.16

   0.15604754 = sum of:
     0.15604754 = product of:
       0.7802377 = sum of:
         0.03893324 = weight(abstract_txt:subject in 6983) [ClassicSimilarity], result of:
           0.03893324 = score(doc=6983,freq=1.0), product of:
             0.07971959 = queryWeight, product of:
               1.0344577 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.019724537 = queryNorm
             0.48837733 = fieldWeight in 6983, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.125 = fieldNorm(doc=6983)
         0.13845152 = weight(abstract_txt:abstracts in 6983) [ClassicSimilarity], result of:
           0.13845152 = score(doc=6983,freq=1.0), product of:
             0.18573047 = queryWeight, product of:
               1.5789624 = boost
               5.963546 = idf(docFreq=308, maxDocs=44218)
               0.019724537 = queryNorm
             0.7454432 = fieldWeight in 6983, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.963546 = idf(docFreq=308, maxDocs=44218)
               0.125 = fieldNorm(doc=6983)
         0.091575816 = weight(abstract_txt:terms in 6983) [ClassicSimilarity], result of:
           0.091575816 = score(doc=6983,freq=2.0), product of:
             0.1281029 = queryWeight, product of:
               1.6060362 = boost
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.019724537 = queryNorm
             0.7148614 = fieldWeight in 6983, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.125 = fieldNorm(doc=6983)
         0.13910064 = weight(abstract_txt:authors in 6983) [ClassicSimilarity], result of:
           0.13910064 = score(doc=6983,freq=2.0), product of:
             0.16927437 = queryWeight, product of:
               1.846169 = boost
               4.648501 = idf(docFreq=1150, maxDocs=44218)
               0.019724537 = queryNorm
             0.8217466 = fieldWeight in 6983, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.648501 = idf(docFreq=1150, maxDocs=44218)
               0.125 = fieldNorm(doc=6983)
         0.37217644 = weight(abstract_txt:indexing in 6983) [ClassicSimilarity], result of:
           0.37217644 = score(doc=6983,freq=3.0), product of:
             0.39521205 = queryWeight, product of:
               4.606545 = boost
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.019724537 = queryNorm
             0.9417133 = fieldWeight in 6983, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.125 = fieldNorm(doc=6983)
       0.2 = coord(5/25)
   

3. Stvilia, B.; Jörgensen, C.: Member activities and quality of tags in a collection of historical photographs in Flickr (2010) 0.14

   0.14266023 = sum of:
     0.14266023 = product of:
       0.5095008 = sum of:
         0.01946662 = weight(abstract_txt:subject in 4117) [ClassicSimilarity], result of:
           0.01946662 = score(doc=4117,freq=1.0), product of:
             0.07971959 = queryWeight, product of:
               1.0344577 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.019724537 = queryNorm
             0.24418867 = fieldWeight in 4117, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.0625 = fieldNorm(doc=4117)
         0.12758017 = weight(abstract_txt:invalid in 4117) [ClassicSimilarity], result of:
           0.12758017 = score(doc=4117,freq=1.0), product of:
             0.22158998 = queryWeight, product of:
               1.2195238 = boost
               9.211981 = idf(docFreq=11, maxDocs=44218)
               0.019724537 = queryNorm
             0.5757488 = fieldWeight in 4117, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.211981 = idf(docFreq=11, maxDocs=44218)
               0.0625 = fieldNorm(doc=4117)
         0.044623606 = weight(abstract_txt:headings in 4117) [ClassicSimilarity], result of:
           0.044623606 = score(doc=4117,freq=1.0), product of:
             0.13859507 = queryWeight, product of:
               1.3639678 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.019724537 = queryNorm
             0.3219711 = fieldWeight in 4117, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.0625 = fieldNorm(doc=4117)
         0.045000743 = weight(abstract_txt:thesaurus in 4117) [ClassicSimilarity], result of:
           0.045000743 = score(doc=4117,freq=1.0), product of:
             0.13937487 = queryWeight, product of:
               1.3677995 = boost
               5.1660094 = idf(docFreq=685, maxDocs=44218)
               0.019724537 = queryNorm
             0.3228756 = fieldWeight in 4117, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1660094 = idf(docFreq=685, maxDocs=44218)
               0.0625 = fieldNorm(doc=4117)
         0.072397046 = weight(abstract_txt:terms in 4117) [ClassicSimilarity], result of:
           0.072397046 = score(doc=4117,freq=5.0), product of:
             0.1281029 = queryWeight, product of:
               1.6060362 = boost
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.019724537 = queryNorm
             0.5651476 = fieldWeight in 4117, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.0625 = fieldNorm(doc=4117)
         0.09299454 = weight(abstract_txt:quality in 4117) [ClassicSimilarity], result of:
           0.09299454 = score(doc=4117,freq=2.0), product of:
             0.22612208 = queryWeight, product of:
               2.4638638 = boost
               4.6528544 = idf(docFreq=1145, maxDocs=44218)
               0.019724537 = queryNorm
             0.4112581 = fieldWeight in 4117, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.6528544 = idf(docFreq=1145, maxDocs=44218)
               0.0625 = fieldNorm(doc=4117)
         0.10743809 = weight(abstract_txt:indexing in 4117) [ClassicSimilarity], result of:
           0.10743809 = score(doc=4117,freq=1.0), product of:
             0.39521205 = queryWeight, product of:
               4.606545 = boost
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.019724537 = queryNorm
             0.27184922 = fieldWeight in 4117, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.0625 = fieldNorm(doc=4117)
       0.28 = coord(7/25)
   

4. Bronson, R.J.: MeSH chemical headings and pharmacologic action (1997) 0.14

   0.14224005 = sum of:
     0.14224005 = product of:
       0.71120024 = sum of:
         0.034066584 = weight(abstract_txt:subject in 984) [ClassicSimilarity], result of:
           0.034066584 = score(doc=984,freq=1.0), product of:
             0.07971959 = queryWeight, product of:
               1.0344577 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.019724537 = queryNorm
             0.42733017 = fieldWeight in 984, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.109375 = fieldNorm(doc=984)
         0.07809131 = weight(abstract_txt:headings in 984) [ClassicSimilarity], result of:
           0.07809131 = score(doc=984,freq=1.0), product of:
             0.13859507 = queryWeight, product of:
               1.3639678 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.019724537 = queryNorm
             0.5634494 = fieldWeight in 984, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.109375 = fieldNorm(doc=984)
         0.056659643 = weight(abstract_txt:terms in 984) [ClassicSimilarity], result of:
           0.056659643 = score(doc=984,freq=1.0), product of:
             0.1281029 = queryWeight, product of:
               1.6060362 = boost
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.019724537 = queryNorm
             0.4422979 = fieldWeight in 984, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.109375 = fieldNorm(doc=984)
         0.35436603 = weight(abstract_txt:chemical in 984) [ClassicSimilarity], result of:
           0.35436603 = score(doc=984,freq=3.0), product of:
             0.26339465 = queryWeight, product of:
               1.8803284 = boost
               7.1017675 = idf(docFreq=98, maxDocs=44218)
               0.019724537 = queryNorm
             1.3453805 = fieldWeight in 984, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.1017675 = idf(docFreq=98, maxDocs=44218)
               0.109375 = fieldNorm(doc=984)
         0.18801665 = weight(abstract_txt:indexing in 984) [ClassicSimilarity], result of:
           0.18801665 = score(doc=984,freq=1.0), product of:
             0.39521205 = queryWeight, product of:
               4.606545 = boost
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.019724537 = queryNorm
             0.47573614 = fieldWeight in 984, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.109375 = fieldNorm(doc=984)
       0.2 = coord(5/25)
   

5. Jones, R.: Indexing the British Medical Journal (1994) 0.14

   0.14189366 = sum of:
     0.14189366 = product of:
       0.50676304 = sum of:
         0.034412447 = weight(abstract_txt:subject in 7924) [ClassicSimilarity], result of:
           0.034412447 = score(doc=7924,freq=2.0), product of:
             0.07971959 = queryWeight, product of:
               1.0344577 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.019724537 = queryNorm
             0.43166864 = fieldWeight in 7924, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.078125 = fieldNorm(doc=7924)
         0.03483103 = weight(abstract_txt:particular in 7924) [ClassicSimilarity], result of:
           0.03483103 = score(doc=7924,freq=1.0), product of:
             0.10125322 = queryWeight, product of:
               1.1658285 = boost
               4.4031897 = idf(docFreq=1470, maxDocs=44218)
               0.019724537 = queryNorm
             0.3439992 = fieldWeight in 7924, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.4031897 = idf(docFreq=1470, maxDocs=44218)
               0.078125 = fieldNorm(doc=7924)
         0.04372407 = weight(abstract_txt:aspects in 7924) [ClassicSimilarity], result of:
           0.04372407 = score(doc=7924,freq=1.0), product of:
             0.117827065 = queryWeight, product of:
               1.2576296 = boost
               4.7499113 = idf(docFreq=1039, maxDocs=44218)
               0.019724537 = queryNorm
             0.37108684 = fieldWeight in 7924, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7499113 = idf(docFreq=1039, maxDocs=44218)
               0.078125 = fieldNorm(doc=7924)
         0.06147438 = weight(abstract_txt:authors in 7924) [ClassicSimilarity], result of:
           0.06147438 = score(doc=7924,freq=1.0), product of:
             0.16927437 = queryWeight, product of:
               1.846169 = boost
               4.648501 = idf(docFreq=1150, maxDocs=44218)
               0.019724537 = queryNorm
             0.36316413 = fieldWeight in 7924, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.648501 = idf(docFreq=1150, maxDocs=44218)
               0.078125 = fieldNorm(doc=7924)
         0.1310926 = weight(abstract_txt:index in 7924) [ClassicSimilarity], result of:
           0.1310926 = score(doc=7924,freq=4.0), product of:
             0.17666906 = queryWeight, product of:
               1.8860626 = boost
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.019724537 = queryNorm
             0.74202347 = fieldWeight in 7924, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.078125 = fieldNorm(doc=7924)
         0.066930905 = weight(abstract_txt:articles in 7924) [ClassicSimilarity], result of:
           0.066930905 = score(doc=7924,freq=1.0), product of:
             0.17914838 = queryWeight, product of:
               1.8992507 = boost
               4.7821565 = idf(docFreq=1006, maxDocs=44218)
               0.019724537 = queryNorm
             0.37360597 = fieldWeight in 7924, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7821565 = idf(docFreq=1006, maxDocs=44218)
               0.078125 = fieldNorm(doc=7924)
         0.13429761 = weight(abstract_txt:indexing in 7924) [ClassicSimilarity], result of:
           0.13429761 = score(doc=7924,freq=1.0), product of:
             0.39521205 = queryWeight, product of:
               4.606545 = boost
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.019724537 = queryNorm
             0.3398115 = fieldWeight in 7924, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.078125 = fieldNorm(doc=7924)
       0.28 = coord(7/25)