Document (#9856)

Author
Batra, D.
Zanakis, S.H.
Title
¬A conceptual database design approach based on rules and heuristics
Source
European journal of information systems. 3(1994) no.3, S.228-239
Year
1994
Abstract
Conceptual and logical database design are complex tasks for non-expert designers. The popular data models for conceptual and logical database design are the entity-relationship and the relational model, respectively. Logical design methodologies for relational databases have relied on mathematically rigorous approaches which are impractical, or textbook approaches which do not provide the rich constructs to capture real applications. Designers have to use intuition to develop rules and heuristics. Proposes a realistic and detailed approach for conceptual design using the ER model for relational databases, based on 3 rules that specify the order in which various types of relationships must be modelled, 3 rules that pertain to detection of derived relationships, and 3 heuristics based on observation of constructs in real applications. The approach is illustrated by many examples

Similar documents (author)

  1. Batra, D.; Davis, J.G.: Conceptual data modelling in database design : similarities and differences between expert and novice designers (1992) 4.88
    4.8754888 = sum of:
      4.8754888 = weight(author_txt:batra in 3005) [ClassicSimilarity], result of:
        4.8754888 = fieldWeight in 3005, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.7509775 = idf(docFreq=6, maxDocs=44218)
          0.5 = fieldNorm(doc=3005)
    
  2. Batra, D.; Antony, S.R.: Novice errors in conceptual database design (1994) 4.88
    4.8754888 = sum of:
      4.8754888 = weight(author_txt:batra in 8238) [ClassicSimilarity], result of:
        4.8754888 = fieldWeight in 8238, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.7509775 = idf(docFreq=6, maxDocs=44218)
          0.5 = fieldNorm(doc=8238)
    
  3. Batra, D.; Sein, M.K.: Improving conceptual database design through feedback (1994) 4.88
    4.8754888 = sum of:
      4.8754888 = weight(author_txt:batra in 8563) [ClassicSimilarity], result of:
        4.8754888 = fieldWeight in 8563, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.7509775 = idf(docFreq=6, maxDocs=44218)
          0.5 = fieldNorm(doc=8563)
    
  4. Batra, D.; Marakas, G.M.: Conceptual data modelling in theory and practice (1995) 4.88
    4.8754888 = sum of:
      4.8754888 = weight(author_txt:batra in 4109) [ClassicSimilarity], result of:
        4.8754888 = fieldWeight in 4109, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.7509775 = idf(docFreq=6, maxDocs=44218)
          0.5 = fieldNorm(doc=4109)
    
  5. Jindal, V.; Bawa, S.; Batra, S.: ¬A review of ranking approaches for semantic search on Web (2014) 3.66
    3.6566167 = sum of:
      3.6566167 = weight(author_txt:batra in 2799) [ClassicSimilarity], result of:
        3.6566167 = fieldWeight in 2799, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.7509775 = idf(docFreq=6, maxDocs=44218)
          0.375 = fieldNorm(doc=2799)
    

Similar documents (content)

  1. Green, R.: ¬The design of a relational database for large-scale bibliographic retrieval (1996) 0.38
    0.38343465 = sum of:
      0.38343465 = product of:
        0.95858663 = sum of:
          0.024693679 = weight(abstract_txt:model in 7712) [ClassicSimilarity], result of:
            0.024693679 = score(doc=7712,freq=1.0), product of:
              0.07929266 = queryWeight, product of:
                1.0016648 = boost
                3.986234 = idf(docFreq=2231, maxDocs=44218)
                0.019858563 = queryNorm
              0.31142452 = fieldWeight in 7712, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.986234 = idf(docFreq=2231, maxDocs=44218)
                0.078125 = fieldNorm(doc=7712)
          0.058021218 = weight(abstract_txt:databases in 7712) [ClassicSimilarity], result of:
            0.058021218 = score(doc=7712,freq=3.0), product of:
              0.09716875 = queryWeight, product of:
                1.1088408 = boost
                4.4127526 = idf(docFreq=1456, maxDocs=44218)
                0.019858563 = queryNorm
              0.5971181 = fieldWeight in 7712, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.4127526 = idf(docFreq=1456, maxDocs=44218)
                0.078125 = fieldNorm(doc=7712)
          0.038156644 = weight(abstract_txt:approaches in 7712) [ClassicSimilarity], result of:
            0.038156644 = score(doc=7712,freq=1.0), product of:
              0.10597967 = queryWeight, product of:
                1.158023 = boost
                4.6084785 = idf(docFreq=1197, maxDocs=44218)
                0.019858563 = queryNorm
              0.3600374 = fieldWeight in 7712, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.6084785 = idf(docFreq=1197, maxDocs=44218)
                0.078125 = fieldNorm(doc=7712)
          0.026793484 = weight(abstract_txt:based in 7712) [ClassicSimilarity], result of:
            0.026793484 = score(doc=7712,freq=2.0), product of:
              0.0760704 = queryWeight, product of:
                1.2015985 = boost
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.019858563 = queryNorm
              0.35221958 = fieldWeight in 7712, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.078125 = fieldNorm(doc=7712)
          0.030722622 = weight(abstract_txt:approach in 7712) [ClassicSimilarity], result of:
            0.030722622 = score(doc=7712,freq=1.0), product of:
              0.10499737 = queryWeight, product of:
                1.4116945 = boost
                3.745328 = idf(docFreq=2839, maxDocs=44218)
                0.019858563 = queryNorm
              0.29260373 = fieldWeight in 7712, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.745328 = idf(docFreq=2839, maxDocs=44218)
                0.078125 = fieldNorm(doc=7712)
          0.064834625 = weight(abstract_txt:database in 7712) [ClassicSimilarity], result of:
            0.064834625 = score(doc=7712,freq=2.0), product of:
              0.1371095 = queryWeight, product of:
                1.6131892 = boost
                4.2799077 = idf(docFreq=1663, maxDocs=44218)
                0.019858563 = queryNorm
              0.47286746 = fieldWeight in 7712, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.2799077 = idf(docFreq=1663, maxDocs=44218)
                0.078125 = fieldNorm(doc=7712)
          0.19438471 = weight(abstract_txt:logical in 7712) [ClassicSimilarity], result of:
            0.19438471 = score(doc=7712,freq=2.0), product of:
              0.28508276 = queryWeight, product of:
                2.3261461 = boost
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.019858563 = queryNorm
              0.6818536 = fieldWeight in 7712, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.078125 = fieldNorm(doc=7712)
          0.27446806 = weight(abstract_txt:relational in 7712) [ClassicSimilarity], result of:
            0.27446806 = score(doc=7712,freq=3.0), product of:
              0.3134443 = queryWeight, product of:
                2.4391117 = boost
                6.4711404 = idf(docFreq=185, maxDocs=44218)
                0.019858563 = queryNorm
              0.87565184 = fieldWeight in 7712, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.4711404 = idf(docFreq=185, maxDocs=44218)
                0.078125 = fieldNorm(doc=7712)
          0.12902664 = weight(abstract_txt:conceptual in 7712) [ClassicSimilarity], result of:
            0.12902664 = score(doc=7712,freq=2.0), product of:
              0.23876026 = queryWeight, product of:
                2.4581134 = boost
                4.891165 = idf(docFreq=902, maxDocs=44218)
                0.019858563 = queryNorm
              0.5404025 = fieldWeight in 7712, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.891165 = idf(docFreq=902, maxDocs=44218)
                0.078125 = fieldNorm(doc=7712)
          0.117484935 = weight(abstract_txt:design in 7712) [ClassicSimilarity], result of:
            0.117484935 = score(doc=7712,freq=4.0), product of:
              0.19177438 = queryWeight, product of:
                2.4630384 = boost
                3.9207718 = idf(docFreq=2382, maxDocs=44218)
                0.019858563 = queryNorm
              0.6126206 = fieldWeight in 7712, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.9207718 = idf(docFreq=2382, maxDocs=44218)
                0.078125 = fieldNorm(doc=7712)
        0.4 = coord(10/25)
    
  2. Batra, D.; Sein, M.K.: Improving conceptual database design through feedback (1994) 0.31
    0.30706364 = sum of:
      0.30706364 = product of:
        0.8529545 = sum of:
          0.047374126 = weight(abstract_txt:databases in 8563) [ClassicSimilarity], result of:
            0.047374126 = score(doc=8563,freq=2.0), product of:
              0.09716875 = queryWeight, product of:
                1.1088408 = boost
                4.4127526 = idf(docFreq=1456, maxDocs=44218)
                0.019858563 = queryNorm
              0.48754486 = fieldWeight in 8563, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.4127526 = idf(docFreq=1456, maxDocs=44218)
                0.078125 = fieldNorm(doc=8563)
          0.026793484 = weight(abstract_txt:based in 8563) [ClassicSimilarity], result of:
            0.026793484 = score(doc=8563,freq=2.0), product of:
              0.0760704 = queryWeight, product of:
                1.2015985 = boost
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.019858563 = queryNorm
              0.35221958 = fieldWeight in 8563, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.1879277 = idf(docFreq=4958, maxDocs=44218)
                0.078125 = fieldNorm(doc=8563)
          0.061251257 = weight(abstract_txt:relationships in 8563) [ClassicSimilarity], result of:
            0.061251257 = score(doc=8563,freq=2.0), product of:
              0.1153212 = queryWeight, product of:
                1.2079821 = boost
                4.807296 = idf(docFreq=981, maxDocs=44218)
                0.019858563 = queryNorm
              0.53113616 = fieldWeight in 8563, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.807296 = idf(docFreq=981, maxDocs=44218)
                0.078125 = fieldNorm(doc=8563)
          0.10141707 = weight(abstract_txt:designers in 8563) [ClassicSimilarity], result of:
            0.10141707 = score(doc=8563,freq=1.0), product of:
              0.20335265 = queryWeight, product of:
                1.6040977 = boost
                6.3836813 = idf(docFreq=202, maxDocs=44218)
                0.019858563 = queryNorm
              0.49872512 = fieldWeight in 8563, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.3836813 = idf(docFreq=202, maxDocs=44218)
                0.078125 = fieldNorm(doc=8563)
          0.045845002 = weight(abstract_txt:database in 8563) [ClassicSimilarity], result of:
            0.045845002 = score(doc=8563,freq=1.0), product of:
              0.1371095 = queryWeight, product of:
                1.6131892 = boost
                4.2799077 = idf(docFreq=1663, maxDocs=44218)
                0.019858563 = queryNorm
              0.33436778 = fieldWeight in 8563, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.2799077 = idf(docFreq=1663, maxDocs=44218)
                0.078125 = fieldNorm(doc=8563)
          0.13745074 = weight(abstract_txt:logical in 8563) [ClassicSimilarity], result of:
            0.13745074 = score(doc=8563,freq=1.0), product of:
              0.28508276 = queryWeight, product of:
                2.3261461 = boost
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.019858563 = queryNorm
              0.4821433 = fieldWeight in 8563, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.078125 = fieldNorm(doc=8563)
          0.22410223 = weight(abstract_txt:relational in 8563) [ClassicSimilarity], result of:
            0.22410223 = score(doc=8563,freq=2.0), product of:
              0.3134443 = queryWeight, product of:
                2.4391117 = boost
                6.4711404 = idf(docFreq=185, maxDocs=44218)
                0.019858563 = queryNorm
              0.7149667 = fieldWeight in 8563, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.4711404 = idf(docFreq=185, maxDocs=44218)
                0.078125 = fieldNorm(doc=8563)
          0.09123561 = weight(abstract_txt:conceptual in 8563) [ClassicSimilarity], result of:
            0.09123561 = score(doc=8563,freq=1.0), product of:
              0.23876026 = queryWeight, product of:
                2.4581134 = boost
                4.891165 = idf(docFreq=902, maxDocs=44218)
                0.019858563 = queryNorm
              0.38212225 = fieldWeight in 8563, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.891165 = idf(docFreq=902, maxDocs=44218)
                0.078125 = fieldNorm(doc=8563)
          0.117484935 = weight(abstract_txt:design in 8563) [ClassicSimilarity], result of:
            0.117484935 = score(doc=8563,freq=4.0), product of:
              0.19177438 = queryWeight, product of:
                2.4630384 = boost
                3.9207718 = idf(docFreq=2382, maxDocs=44218)
                0.019858563 = queryNorm
              0.6126206 = fieldWeight in 8563, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.9207718 = idf(docFreq=2382, maxDocs=44218)
                0.078125 = fieldNorm(doc=8563)
        0.36 = coord(9/25)
    
  3. Batra, D.; Antony, S.R.: Novice errors in conceptual database design (1994) 0.24
    0.24083392 = sum of:
      0.24083392 = product of:
        1.0034747 = sum of:
          0.17211045 = weight(abstract_txt:designers in 8238) [ClassicSimilarity], result of:
            0.17211045 = score(doc=8238,freq=2.0), product of:
              0.20335265 = queryWeight, product of:
                1.6040977 = boost
                6.3836813 = idf(docFreq=202, maxDocs=44218)
                0.019858563 = queryNorm
              0.8463645 = fieldWeight in 8238, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.3836813 = idf(docFreq=202, maxDocs=44218)
                0.09375 = fieldNorm(doc=8238)
          0.110028006 = weight(abstract_txt:database in 8238) [ClassicSimilarity], result of:
            0.110028006 = score(doc=8238,freq=4.0), product of:
              0.1371095 = queryWeight, product of:
                1.6131892 = boost
                4.2799077 = idf(docFreq=1663, maxDocs=44218)
                0.019858563 = queryNorm
              0.8024827 = fieldWeight in 8238, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.2799077 = idf(docFreq=1663, maxDocs=44218)
                0.09375 = fieldNorm(doc=8238)
          0.1649409 = weight(abstract_txt:logical in 8238) [ClassicSimilarity], result of:
            0.1649409 = score(doc=8238,freq=1.0), product of:
              0.28508276 = queryWeight, product of:
                2.3261461 = boost
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.019858563 = queryNorm
              0.578572 = fieldWeight in 8238, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.09375 = fieldNorm(doc=8238)
          0.15483195 = weight(abstract_txt:conceptual in 8238) [ClassicSimilarity], result of:
            0.15483195 = score(doc=8238,freq=2.0), product of:
              0.23876026 = queryWeight, product of:
                2.4581134 = boost
                4.891165 = idf(docFreq=902, maxDocs=44218)
                0.019858563 = queryNorm
              0.6484829 = fieldWeight in 8238, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.891165 = idf(docFreq=902, maxDocs=44218)
                0.09375 = fieldNorm(doc=8238)
          0.070490964 = weight(abstract_txt:design in 8238) [ClassicSimilarity], result of:
            0.070490964 = score(doc=8238,freq=1.0), product of:
              0.19177438 = queryWeight, product of:
                2.4630384 = boost
                3.9207718 = idf(docFreq=2382, maxDocs=44218)
                0.019858563 = queryNorm
              0.36757237 = fieldWeight in 8238, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9207718 = idf(docFreq=2382, maxDocs=44218)
                0.09375 = fieldNorm(doc=8238)
          0.3310725 = weight(abstract_txt:heuristics in 8238) [ClassicSimilarity], result of:
            0.3310725 = score(doc=8238,freq=1.0), product of:
              0.453629 = queryWeight, product of:
                2.9342825 = boost
                7.7848644 = idf(docFreq=49, maxDocs=44218)
                0.019858563 = queryNorm
              0.72983104 = fieldWeight in 8238, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.7848644 = idf(docFreq=49, maxDocs=44218)
                0.09375 = fieldNorm(doc=8238)
        0.24 = coord(6/25)
    
  4. Chan, H.C.; Wei, K.K.; Siau, K.L.: ¬An empirical study on end-users' update performance for different abstraction levels (1994) 0.20
    0.20178615 = sum of:
      0.20178615 = product of:
        0.7206648 = sum of:
          0.04190656 = weight(abstract_txt:model in 1762) [ClassicSimilarity], result of:
            0.04190656 = score(doc=1762,freq=2.0), product of:
              0.07929266 = queryWeight, product of:
                1.0016648 = boost
                3.986234 = idf(docFreq=2231, maxDocs=44218)
                0.019858563 = queryNorm
              0.5285049 = fieldWeight in 1762, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.986234 = idf(docFreq=2231, maxDocs=44218)
                0.09375 = fieldNorm(doc=1762)
          0.017412126 = weight(abstract_txt:which in 1762) [ClassicSimilarity], result of:
            0.017412126 = score(doc=1762,freq=1.0), product of:
              0.06367759 = queryWeight, product of:
                1.0993724 = boost
                2.9167147 = idf(docFreq=6503, maxDocs=44218)
                0.019858563 = queryNorm
              0.273442 = fieldWeight in 1762, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.9167147 = idf(docFreq=6503, maxDocs=44218)
                0.09375 = fieldNorm(doc=1762)
          0.04019828 = weight(abstract_txt:databases in 1762) [ClassicSimilarity], result of:
            0.04019828 = score(doc=1762,freq=1.0), product of:
              0.09716875 = queryWeight, product of:
                1.1088408 = boost
                4.4127526 = idf(docFreq=1456, maxDocs=44218)
                0.019858563 = queryNorm
              0.41369557 = fieldWeight in 1762, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.4127526 = idf(docFreq=1456, maxDocs=44218)
                0.09375 = fieldNorm(doc=1762)
          0.07780154 = weight(abstract_txt:database in 1762) [ClassicSimilarity], result of:
            0.07780154 = score(doc=1762,freq=2.0), product of:
              0.1371095 = queryWeight, product of:
                1.6131892 = boost
                4.2799077 = idf(docFreq=1663, maxDocs=44218)
                0.019858563 = queryNorm
              0.5674409 = fieldWeight in 1762, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.2799077 = idf(docFreq=1663, maxDocs=44218)
                0.09375 = fieldNorm(doc=1762)
          0.1649409 = weight(abstract_txt:logical in 1762) [ClassicSimilarity], result of:
            0.1649409 = score(doc=1762,freq=1.0), product of:
              0.28508276 = queryWeight, product of:
                2.3261461 = boost
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.019858563 = queryNorm
              0.578572 = fieldWeight in 1762, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.09375 = fieldNorm(doc=1762)
          0.2689227 = weight(abstract_txt:relational in 1762) [ClassicSimilarity], result of:
            0.2689227 = score(doc=1762,freq=2.0), product of:
              0.3134443 = queryWeight, product of:
                2.4391117 = boost
                6.4711404 = idf(docFreq=185, maxDocs=44218)
                0.019858563 = queryNorm
              0.8579601 = fieldWeight in 1762, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.4711404 = idf(docFreq=185, maxDocs=44218)
                0.09375 = fieldNorm(doc=1762)
          0.10948273 = weight(abstract_txt:conceptual in 1762) [ClassicSimilarity], result of:
            0.10948273 = score(doc=1762,freq=1.0), product of:
              0.23876026 = queryWeight, product of:
                2.4581134 = boost
                4.891165 = idf(docFreq=902, maxDocs=44218)
                0.019858563 = queryNorm
              0.4585467 = fieldWeight in 1762, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.891165 = idf(docFreq=902, maxDocs=44218)
                0.09375 = fieldNorm(doc=1762)
        0.28 = coord(7/25)
    
  5. Boeder, R.: Database applications for libraries : an introduction (1996) 0.18
    0.18055566 = sum of:
      0.18055566 = product of:
        0.7523153 = sum of:
          0.046897996 = weight(abstract_txt:databases in 340) [ClassicSimilarity], result of:
            0.046897996 = score(doc=340,freq=1.0), product of:
              0.09716875 = queryWeight, product of:
                1.1088408 = boost
                4.4127526 = idf(docFreq=1456, maxDocs=44218)
                0.019858563 = queryNorm
              0.48264483 = fieldWeight in 340, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.4127526 = idf(docFreq=1456, maxDocs=44218)
                0.109375 = fieldNorm(doc=340)
          0.08231775 = weight(abstract_txt:applications in 340) [ClassicSimilarity], result of:
            0.08231775 = score(doc=340,freq=2.0), product of:
              0.11222151 = queryWeight, product of:
                1.1916369 = boost
                4.7422485 = idf(docFreq=1047, maxDocs=44218)
                0.019858563 = queryNorm
              0.73352915 = fieldWeight in 340, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.7422485 = idf(docFreq=1047, maxDocs=44218)
                0.109375 = fieldNorm(doc=340)
          0.15721561 = weight(abstract_txt:database in 340) [ClassicSimilarity], result of:
            0.15721561 = score(doc=340,freq=6.0), product of:
              0.1371095 = queryWeight, product of:
                1.6131892 = boost
                4.2799077 = idf(docFreq=1663, maxDocs=44218)
                0.019858563 = queryNorm
              1.1466427 = fieldWeight in 340, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                4.2799077 = idf(docFreq=1663, maxDocs=44218)
                0.109375 = fieldNorm(doc=340)
          0.2218499 = weight(abstract_txt:relational in 340) [ClassicSimilarity], result of:
            0.2218499 = score(doc=340,freq=1.0), product of:
              0.3134443 = queryWeight, product of:
                2.4391117 = boost
                6.4711404 = idf(docFreq=185, maxDocs=44218)
                0.019858563 = queryNorm
              0.70778096 = fieldWeight in 340, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.4711404 = idf(docFreq=185, maxDocs=44218)
                0.109375 = fieldNorm(doc=340)
          0.12772985 = weight(abstract_txt:conceptual in 340) [ClassicSimilarity], result of:
            0.12772985 = score(doc=340,freq=1.0), product of:
              0.23876026 = queryWeight, product of:
                2.4581134 = boost
                4.891165 = idf(docFreq=902, maxDocs=44218)
                0.019858563 = queryNorm
              0.5349711 = fieldWeight in 340, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.891165 = idf(docFreq=902, maxDocs=44218)
                0.109375 = fieldNorm(doc=340)
          0.11630415 = weight(abstract_txt:design in 340) [ClassicSimilarity], result of:
            0.11630415 = score(doc=340,freq=2.0), product of:
              0.19177438 = queryWeight, product of:
                2.4630384 = boost
                3.9207718 = idf(docFreq=2382, maxDocs=44218)
                0.019858563 = queryNorm
              0.60646343 = fieldWeight in 340, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.9207718 = idf(docFreq=2382, maxDocs=44218)
                0.109375 = fieldNorm(doc=340)
        0.24 = coord(6/25)