Document (#7802)

Author

Gopinath, M.A.

Title

Descriptors and their role in information retrieval

Source

Library science with a slant to documentation. 30(1993) no.3, S.118-123

Year

1993

Abstract

Explains the role and value of descriptors in information retrieval. Discusses methods of generating descriptors from the text, how they correlate to classification schemes, and their use as linking devices in providing cues to individual users of information retrieval systems. Notes a number of controlling devices which can be used to fine-tune the role of descriptors in information retrieval

Similar documents (author)

1. Gopinath, M.A.: Relevance of Ranganathan's postulational approach in the identification of key concepts in the newly formed subjects and its implications to intellectual organisation of information (1986) 5.21

   5.2088575 = sum of:
     5.2088575 = weight(author_txt:gopinath in 321) [ClassicSimilarity], result of:
       5.2088575 = fieldWeight in 321, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.334172 = idf(docFreq=28, maxDocs=44421)
         0.625 = fieldNorm(doc=321)
   

2. Gopinath, M.A.: Symbiosis between classification and thesaurus (1987) 5.21

   5.2088575 = sum of:
     5.2088575 = weight(author_txt:gopinath in 523) [ClassicSimilarity], result of:
       5.2088575 = fieldWeight in 523, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.334172 = idf(docFreq=28, maxDocs=44421)
         0.625 = fieldNorm(doc=523)
   

3. Gopinath, M.A.: Design of concept codes in information retrieval : an analysis of trends (1987) 5.21

   5.2088575 = sum of:
     5.2088575 = weight(author_txt:gopinath in 715) [ClassicSimilarity], result of:
       5.2088575 = fieldWeight in 715, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.334172 = idf(docFreq=28, maxDocs=44421)
         0.625 = fieldNorm(doc=715)
   

4. Gopinath, M.A.: Summary of the work and acievements of Dr. S.R. Ranganathan (1992) 5.21

   5.2088575 = sum of:
     5.2088575 = weight(author_txt:gopinath in 2356) [ClassicSimilarity], result of:
       5.2088575 = fieldWeight in 2356, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.334172 = idf(docFreq=28, maxDocs=44421)
         0.625 = fieldNorm(doc=2356)
   

5. Gopinath, M.A.: Towards a scientific approach to classification and cataloguing : contributions of S.R. Ranganathan (1992) 5.21

   5.2088575 = sum of:
     5.2088575 = weight(author_txt:gopinath in 2534) [ClassicSimilarity], result of:
       5.2088575 = fieldWeight in 2534, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.334172 = idf(docFreq=28, maxDocs=44421)
         0.625 = fieldNorm(doc=2534)
   

Similar documents (content)

1. Amirhosseini, M.: Quantitative evaluation of the movement from complexity toward simplicity in the structure of thesaurus descriptors (2015) 0.18

   0.1849963 = sum of:
     0.1849963 = product of:
       0.77081794 = sum of:
         0.016102258 = weight(abstract_txt:number in 682) [ClassicSimilarity], result of:
           0.016102258 = score(doc=682,freq=1.0), product of:
             0.06229604 = queryWeight, product of:
               1.1034945 = boost
               4.1356745 = idf(docFreq=1930, maxDocs=44421)
               0.013650354 = queryNorm
             0.25847965 = fieldWeight in 682, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1356745 = idf(docFreq=1930, maxDocs=44421)
               0.0625 = fieldNorm(doc=682)
         0.016193518 = weight(abstract_txt:methods in 682) [ClassicSimilarity], result of:
           0.016193518 = score(doc=682,freq=1.0), product of:
             0.062531196 = queryWeight, product of:
               1.1055753 = boost
               4.1434727 = idf(docFreq=1915, maxDocs=44421)
               0.013650354 = queryNorm
             0.25896704 = fieldWeight in 682, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1434727 = idf(docFreq=1915, maxDocs=44421)
               0.0625 = fieldNorm(doc=682)
         0.027155222 = weight(abstract_txt:providing in 682) [ClassicSimilarity], result of:
           0.027155222 = score(doc=682,freq=1.0), product of:
             0.08826154 = queryWeight, product of:
               1.3134868 = boost
               4.922683 = idf(docFreq=878, maxDocs=44421)
               0.013650354 = queryNorm
             0.30766767 = fieldWeight in 682, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.922683 = idf(docFreq=878, maxDocs=44421)
               0.0625 = fieldNorm(doc=682)
         0.01288728 = weight(abstract_txt:information in 682) [ClassicSimilarity], result of:
           0.01288728 = score(doc=682,freq=1.0), product of:
             0.085243925 = queryWeight, product of:
               2.5816758 = boost
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.013650354 = queryNorm
             0.15118122 = fieldWeight in 682, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.0625 = fieldNorm(doc=682)
         0.038259078 = weight(abstract_txt:retrieval in 682) [ClassicSimilarity], result of:
           0.038259078 = score(doc=682,freq=1.0), product of:
             0.1760809 = queryWeight, product of:
               3.7104456 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.013650354 = queryNorm
             0.21728125 = fieldWeight in 682, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.0625 = fieldNorm(doc=682)
         0.66022056 = weight(abstract_txt:descriptors in 682) [ClassicSimilarity], result of:
           0.66022056 = score(doc=682,freq=6.0), product of:
             0.64709026 = queryWeight, product of:
               7.1129932 = boost
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.013650354 = queryNorm
             1.0202913 = fieldWeight in 682, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.0625 = fieldNorm(doc=682)
       0.24 = coord(6/25)
   

2. Posch, L.; Schaer, P.; Bleier, A.; Strohmaier, M.: ¬A system for probabilistic linking of thesauri and classification systems (2015) 0.17

   0.1733391 = sum of:
     0.1733391 = product of:
       0.7222463 = sum of:
         0.037629053 = weight(abstract_txt:classification in 3515) [ClassicSimilarity], result of:
           0.037629053 = score(doc=3515,freq=3.0), product of:
             0.0580475 = queryWeight, product of:
               1.0652014 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.013650354 = queryNorm
             0.6482459 = fieldWeight in 3515, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.09375 = fieldNorm(doc=3515)
         0.022530332 = weight(abstract_txt:text in 3515) [ClassicSimilarity], result of:
           0.022530332 = score(doc=3515,freq=1.0), product of:
             0.05947304 = queryWeight, product of:
               1.0782018 = boost
               4.040882 = idf(docFreq=2122, maxDocs=44421)
               0.013650354 = queryNorm
             0.3788327 = fieldWeight in 3515, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.040882 = idf(docFreq=2122, maxDocs=44421)
               0.09375 = fieldNorm(doc=3515)
         0.04073283 = weight(abstract_txt:providing in 3515) [ClassicSimilarity], result of:
           0.04073283 = score(doc=3515,freq=1.0), product of:
             0.08826154 = queryWeight, product of:
               1.3134868 = boost
               4.922683 = idf(docFreq=878, maxDocs=44421)
               0.013650354 = queryNorm
             0.4615015 = fieldWeight in 3515, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.922683 = idf(docFreq=878, maxDocs=44421)
               0.09375 = fieldNorm(doc=3515)
         0.030255418 = weight(abstract_txt:their in 3515) [ClassicSimilarity], result of:
           0.030255418 = score(doc=3515,freq=2.0), product of:
             0.07238977 = queryWeight, product of:
               1.6822617 = boost
               3.1523883 = idf(docFreq=5161, maxDocs=44421)
               0.013650354 = queryNorm
             0.41795158 = fieldWeight in 3515, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1523883 = idf(docFreq=5161, maxDocs=44421)
               0.09375 = fieldNorm(doc=3515)
         0.01933092 = weight(abstract_txt:information in 3515) [ClassicSimilarity], result of:
           0.01933092 = score(doc=3515,freq=1.0), product of:
             0.085243925 = queryWeight, product of:
               2.5816758 = boost
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.013650354 = queryNorm
             0.22677183 = fieldWeight in 3515, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.09375 = fieldNorm(doc=3515)
         0.57176775 = weight(abstract_txt:descriptors in 3515) [ClassicSimilarity], result of:
           0.57176775 = score(doc=3515,freq=2.0), product of:
             0.64709026 = queryWeight, product of:
               7.1129932 = boost
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.013650354 = queryNorm
             0.88359815 = fieldWeight in 3515, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.09375 = fieldNorm(doc=3515)
       0.24 = coord(6/25)
   

3. Jianchao, X.; Ming, H.; Milin, S.: On indexing descriptors for document archive (1998) 0.17

   0.17190205 = sum of:
     0.17190205 = product of:
       1.0743878 = sum of:
         0.02804947 = weight(abstract_txt:discusses in 4567) [ClassicSimilarity], result of:
           0.02804947 = score(doc=4567,freq=1.0), product of:
             0.056815352 = queryWeight, product of:
               1.0538355 = boost
               3.9495623 = idf(docFreq=2325, maxDocs=44421)
               0.013650354 = queryNorm
             0.4936953 = fieldWeight in 4567, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9495623 = idf(docFreq=2325, maxDocs=44421)
               0.125 = fieldNorm(doc=4567)
         0.030040443 = weight(abstract_txt:text in 4567) [ClassicSimilarity], result of:
           0.030040443 = score(doc=4567,freq=1.0), product of:
             0.05947304 = queryWeight, product of:
               1.0782018 = boost
               4.040882 = idf(docFreq=2122, maxDocs=44421)
               0.013650354 = queryNorm
             0.50511026 = fieldWeight in 4567, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.040882 = idf(docFreq=2122, maxDocs=44421)
               0.125 = fieldNorm(doc=4567)
         0.082604975 = weight(abstract_txt:explains in 4567) [ClassicSimilarity], result of:
           0.082604975 = score(doc=4567,freq=1.0), product of:
             0.11673114 = queryWeight, product of:
               1.5105438 = boost
               5.661213 = idf(docFreq=419, maxDocs=44421)
               0.013650354 = queryNorm
             0.7076516 = fieldWeight in 4567, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.661213 = idf(docFreq=419, maxDocs=44421)
               0.125 = fieldNorm(doc=4567)
         0.9336929 = weight(abstract_txt:descriptors in 4567) [ClassicSimilarity], result of:
           0.9336929 = score(doc=4567,freq=3.0), product of:
             0.64709026 = queryWeight, product of:
               7.1129932 = boost
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.013650354 = queryNorm
             1.4429098 = fieldWeight in 4567, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.125 = fieldNorm(doc=4567)
       0.16 = coord(4/25)
   

4. Hainebach, R.: European Community databases : a subject analysis (1992) 0.16

   0.16165906 = sum of:
     0.16165906 = product of:
       0.5773538 = sum of:
         0.017974941 = weight(abstract_txt:they in 471) [ClassicSimilarity], result of:
           0.017974941 = score(doc=471,freq=1.0), product of:
             0.051158767 = queryWeight, product of:
               3.7477977 = idf(docFreq=2845, maxDocs=44421)
               0.013650354 = queryNorm
             0.35135603 = fieldWeight in 471, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.7477977 = idf(docFreq=2845, maxDocs=44421)
               0.09375 = fieldNorm(doc=471)
         0.021725144 = weight(abstract_txt:classification in 471) [ClassicSimilarity], result of:
           0.021725144 = score(doc=471,freq=1.0), product of:
             0.0580475 = queryWeight, product of:
               1.0652014 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.013650354 = queryNorm
             0.37426496 = fieldWeight in 471, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.09375 = fieldNorm(doc=471)
         0.031862702 = weight(abstract_txt:text in 471) [ClassicSimilarity], result of:
           0.031862702 = score(doc=471,freq=2.0), product of:
             0.05947304 = queryWeight, product of:
               1.0782018 = boost
               4.040882 = idf(docFreq=2122, maxDocs=44421)
               0.013650354 = queryNorm
             0.5357503 = fieldWeight in 471, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.040882 = idf(docFreq=2122, maxDocs=44421)
               0.09375 = fieldNorm(doc=471)
         0.024290279 = weight(abstract_txt:methods in 471) [ClassicSimilarity], result of:
           0.024290279 = score(doc=471,freq=1.0), product of:
             0.062531196 = queryWeight, product of:
               1.1055753 = boost
               4.1434727 = idf(docFreq=1915, maxDocs=44421)
               0.013650354 = queryNorm
             0.38845056 = fieldWeight in 471, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1434727 = idf(docFreq=1915, maxDocs=44421)
               0.09375 = fieldNorm(doc=471)
         0.05786888 = weight(abstract_txt:schemes in 471) [ClassicSimilarity], result of:
           0.05786888 = score(doc=471,freq=1.0), product of:
             0.11154201 = queryWeight, product of:
               1.4765875 = boost
               5.5339513 = idf(docFreq=476, maxDocs=44421)
               0.013650354 = queryNorm
             0.51880795 = fieldWeight in 471, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5339513 = idf(docFreq=476, maxDocs=44421)
               0.09375 = fieldNorm(doc=471)
         0.01933092 = weight(abstract_txt:information in 471) [ClassicSimilarity], result of:
           0.01933092 = score(doc=471,freq=1.0), product of:
             0.085243925 = queryWeight, product of:
               2.5816758 = boost
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.013650354 = queryNorm
             0.22677183 = fieldWeight in 471, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.09375 = fieldNorm(doc=471)
         0.4043009 = weight(abstract_txt:descriptors in 471) [ClassicSimilarity], result of:
           0.4043009 = score(doc=471,freq=1.0), product of:
             0.64709026 = queryWeight, product of:
               7.1129932 = boost
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.013650354 = queryNorm
             0.6247983 = fieldWeight in 471, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.09375 = fieldNorm(doc=471)
       0.28 = coord(7/25)
   

5. Ferber, R.: Automated indexing with thesaurus descriptors : a co-occurence based approach to multilingual retrieval (1997) 0.15

   0.15456946 = sum of:
     0.15456946 = product of:
       0.7728473 = sum of:
         0.022901094 = weight(abstract_txt:methods in 5144) [ClassicSimilarity], result of:
           0.022901094 = score(doc=5144,freq=2.0), product of:
             0.062531196 = queryWeight, product of:
               1.1055753 = boost
               4.1434727 = idf(docFreq=1915, maxDocs=44421)
               0.013650354 = queryNorm
             0.3662347 = fieldWeight in 5144, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.1434727 = idf(docFreq=1915, maxDocs=44421)
               0.0625 = fieldNorm(doc=5144)
         0.03857925 = weight(abstract_txt:schemes in 5144) [ClassicSimilarity], result of:
           0.03857925 = score(doc=5144,freq=1.0), product of:
             0.11154201 = queryWeight, product of:
               1.4765875 = boost
               5.5339513 = idf(docFreq=476, maxDocs=44421)
               0.013650354 = queryNorm
             0.34587196 = fieldWeight in 5144, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5339513 = idf(docFreq=476, maxDocs=44421)
               0.0625 = fieldNorm(doc=5144)
         0.01288728 = weight(abstract_txt:information in 5144) [ClassicSimilarity], result of:
           0.01288728 = score(doc=5144,freq=1.0), product of:
             0.085243925 = queryWeight, product of:
               2.5816758 = boost
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.013650354 = queryNorm
             0.15118122 = fieldWeight in 5144, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.0625 = fieldNorm(doc=5144)
         0.038259078 = weight(abstract_txt:retrieval in 5144) [ClassicSimilarity], result of:
           0.038259078 = score(doc=5144,freq=1.0), product of:
             0.1760809 = queryWeight, product of:
               3.7104456 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.013650354 = queryNorm
             0.21728125 = fieldWeight in 5144, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.0625 = fieldNorm(doc=5144)
         0.66022056 = weight(abstract_txt:descriptors in 5144) [ClassicSimilarity], result of:
           0.66022056 = score(doc=5144,freq=6.0), product of:
             0.64709026 = queryWeight, product of:
               7.1129932 = boost
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.013650354 = queryNorm
             1.0202913 = fieldWeight in 5144, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.0625 = fieldNorm(doc=5144)
       0.2 = coord(5/25)