Document (#40491)

Author
Mestrovic, A.
Cali, A.
Title
¬An ontology-based approach to information retrieval
Source
Semantic keyword-based search on structured data sources: COST Action IC1302. Second International KEYSTONE Conference, IKC 2016, Cluj-Napoca, Romania, September 8-9, 2016, Revised Selected Papers. Eds.: A. Calì, A. et al
Imprint
Springer International Publishing
Year
2017
Pages
S.150-156
Series
Information Systems and Applications, incl. Internet/Web, and HCI; 10151
Abstract
We define a general framework for ontology-based information retrieval (IR). In our approach, document and query expansion rely on a base taxonomy that is extracted from a lexical database or a Linked Data set (e.g. WordNet, Wiktionary etc.). Each term from a document or query is modelled as a vector of base concepts from the base taxonomy. We define a set of mapping functions which map multiple ontological layers (dimensions) onto the base taxonomy. This way, each concept from the included ontologies can also be represented as a vector of base concepts from the base taxonomy. We propose a general weighting schema which is used for the vector space model. Our framework can therefore take into account various lexical and semantic relations between terms and concepts (e.g. synonymy, hierarchy, meronymy, antonymy, geo-proximity, etc.). This allows us to avoid certain vocabulary problems (e.g. synonymy, polysemy) as well as to reduce the vector size in the IR tasks.
Content
Vgl.: https://www.springerprofessional.de/an-ontology-based-approach-to-information-retrieval/12066802. Vgl. auch: http://www.keystone-cost.eu/ikc2016/program.php.
Theme
Wissensrepräsentation

Similar documents (content)

  1. Burke, R.D.: Question answering from frequently asked question files : experiences with the FAQ Finder System (1997) 0.33
    0.32911125 = sum of:
      0.32911125 = product of:
        0.91419786 = sum of:
          0.07686423 = weight(abstract_txt:rely in 3192) [ClassicSimilarity], result of:
            0.07686423 = score(doc=3192,freq=1.0), product of:
              0.105662666 = queryWeight, product of:
                6.6509643 = idf(docFreq=151, maxDocs=43254)
                0.015886819 = queryNorm
              0.72744924 = fieldWeight in 3192, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.6509643 = idf(docFreq=151, maxDocs=43254)
                0.109375 = fieldNorm(doc=3192)
          0.021829873 = weight(abstract_txt:retrieval in 3192) [ClassicSimilarity], result of:
            0.021829873 = score(doc=3192,freq=1.0), product of:
              0.057519644 = queryWeight, product of:
                1.0434276 = boost
                3.4699 = idf(docFreq=3658, maxDocs=43254)
                0.015886819 = queryNorm
              0.3795203 = fieldWeight in 3192, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4699 = idf(docFreq=3658, maxDocs=43254)
                0.109375 = fieldNorm(doc=3192)
          0.027683817 = weight(abstract_txt:approach in 3192) [ClassicSimilarity], result of:
            0.027683817 = score(doc=3192,freq=1.0), product of:
              0.067390606 = queryWeight, product of:
                1.1294159 = boost
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.015886819 = queryNorm
              0.41079637 = fieldWeight in 3192, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.109375 = fieldNorm(doc=3192)
          0.121283434 = weight(abstract_txt:wordnet in 3192) [ClassicSimilarity], result of:
            0.121283434 = score(doc=3192,freq=1.0), product of:
              0.1432099 = queryWeight, product of:
                1.1641951 = boost
                7.7430196 = idf(docFreq=50, maxDocs=43254)
                0.015886819 = queryNorm
              0.8468928 = fieldWeight in 3192, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.7430196 = idf(docFreq=50, maxDocs=43254)
                0.109375 = fieldNorm(doc=3192)
          0.04108308 = weight(abstract_txt:document in 3192) [ClassicSimilarity], result of:
            0.04108308 = score(doc=3192,freq=1.0), product of:
              0.087678015 = queryWeight, product of:
                1.2882483 = boost
                4.2840466 = idf(docFreq=1620, maxDocs=43254)
                0.015886819 = queryNorm
              0.4685676 = fieldWeight in 3192, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.2840466 = idf(docFreq=1620, maxDocs=43254)
                0.109375 = fieldNorm(doc=3192)
          0.055593446 = weight(abstract_txt:query in 3192) [ClassicSimilarity], result of:
            0.055593446 = score(doc=3192,freq=1.0), product of:
              0.10726659 = queryWeight, product of:
                1.4249067 = boost
                4.738502 = idf(docFreq=1028, maxDocs=43254)
                0.015886819 = queryNorm
              0.51827365 = fieldWeight in 3192, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.738502 = idf(docFreq=1028, maxDocs=43254)
                0.109375 = fieldNorm(doc=3192)
          0.14570506 = weight(abstract_txt:lexical in 3192) [ClassicSimilarity], result of:
            0.14570506 = score(doc=3192,freq=1.0), product of:
              0.20390685 = queryWeight, product of:
                1.9645818 = boost
                6.5331817 = idf(docFreq=170, maxDocs=43254)
                0.015886819 = queryNorm
              0.71456677 = fieldWeight in 3192, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.5331817 = idf(docFreq=170, maxDocs=43254)
                0.109375 = fieldNorm(doc=3192)
          0.028083388 = weight(abstract_txt:from in 3192) [ClassicSimilarity], result of:
            0.028083388 = score(doc=3192,freq=1.0), product of:
              0.0923411 = queryWeight, product of:
                2.0903633 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.015886819 = queryNorm
              0.30412662 = fieldWeight in 3192, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.109375 = fieldNorm(doc=3192)
          0.39607155 = weight(abstract_txt:base in 3192) [ClassicSimilarity], result of:
            0.39607155 = score(doc=3192,freq=2.0), product of:
              0.45463365 = queryWeight, product of:
                5.0809584 = boost
                5.632212 = idf(docFreq=420, maxDocs=43254)
                0.015886819 = queryNorm
              0.8711884 = fieldWeight in 3192, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.632212 = idf(docFreq=420, maxDocs=43254)
                0.109375 = fieldNorm(doc=3192)
        0.36 = coord(9/25)
    
  2. Green, R.: WordNet (2009) 0.31
    0.3092809 = sum of:
      0.3092809 = product of:
        0.96650285 = sum of:
          0.01871132 = weight(abstract_txt:retrieval in 1161) [ClassicSimilarity], result of:
            0.01871132 = score(doc=1161,freq=1.0), product of:
              0.057519644 = queryWeight, product of:
                1.0434276 = boost
                3.4699 = idf(docFreq=3658, maxDocs=43254)
                0.015886819 = queryNorm
              0.3253031 = fieldWeight in 1161, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4699 = idf(docFreq=3658, maxDocs=43254)
                0.09375 = fieldNorm(doc=1161)
          0.1800592 = weight(abstract_txt:wordnet in 1161) [ClassicSimilarity], result of:
            0.1800592 = score(doc=1161,freq=3.0), product of:
              0.1432099 = queryWeight, product of:
                1.1641951 = boost
                7.7430196 = idf(docFreq=50, maxDocs=43254)
                0.015886819 = queryNorm
              1.2573097 = fieldWeight in 1161, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                7.7430196 = idf(docFreq=50, maxDocs=43254)
                0.09375 = fieldNorm(doc=1161)
          0.03665808 = weight(abstract_txt:general in 1161) [ClassicSimilarity], result of:
            0.03665808 = score(doc=1161,freq=1.0), product of:
              0.09005885 = queryWeight, product of:
                1.3056219 = boost
                4.341822 = idf(docFreq=1529, maxDocs=43254)
                0.015886819 = queryNorm
              0.40704584 = fieldWeight in 1161, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.341822 = idf(docFreq=1529, maxDocs=43254)
                0.09375 = fieldNorm(doc=1161)
          0.15179966 = weight(abstract_txt:polysemy in 1161) [ClassicSimilarity], result of:
            0.15179966 = score(doc=1161,freq=1.0), product of:
              0.18432482 = queryWeight, product of:
                1.320782 = boost
                8.784473 = idf(docFreq=17, maxDocs=43254)
                0.015886819 = queryNorm
              0.8235444 = fieldWeight in 1161, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.784473 = idf(docFreq=17, maxDocs=43254)
                0.09375 = fieldNorm(doc=1161)
          0.2163159 = weight(abstract_txt:lexical in 1161) [ClassicSimilarity], result of:
            0.2163159 = score(doc=1161,freq=3.0), product of:
              0.20390685 = queryWeight, product of:
                1.9645818 = boost
                6.5331817 = idf(docFreq=170, maxDocs=43254)
                0.015886819 = queryNorm
              1.0608565 = fieldWeight in 1161, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.5331817 = idf(docFreq=170, maxDocs=43254)
                0.09375 = fieldNorm(doc=1161)
          0.064149514 = weight(abstract_txt:concepts in 1161) [ClassicSimilarity], result of:
            0.064149514 = score(doc=1161,freq=1.0), product of:
              0.14970602 = queryWeight, product of:
                2.0616715 = boost
                4.570701 = idf(docFreq=1216, maxDocs=43254)
                0.015886819 = queryNorm
              0.42850322 = fieldWeight in 1161, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.570701 = idf(docFreq=1216, maxDocs=43254)
                0.09375 = fieldNorm(doc=1161)
          0.024071475 = weight(abstract_txt:from in 1161) [ClassicSimilarity], result of:
            0.024071475 = score(doc=1161,freq=1.0), product of:
              0.0923411 = queryWeight, product of:
                2.0903633 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.015886819 = queryNorm
              0.26067996 = fieldWeight in 1161, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.09375 = fieldNorm(doc=1161)
          0.27473778 = weight(abstract_txt:synonymy in 1161) [ClassicSimilarity], result of:
            0.27473778 = score(doc=1161,freq=1.0), product of:
              0.3448992 = queryWeight, product of:
                2.5550554 = boost
                8.496791 = idf(docFreq=23, maxDocs=43254)
                0.015886819 = queryNorm
              0.7965741 = fieldWeight in 1161, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.496791 = idf(docFreq=23, maxDocs=43254)
                0.09375 = fieldNorm(doc=1161)
        0.32 = coord(8/25)
    
  3. Farazi, M.: Faceted lightweight ontologies : a formalization and some experiments (2010) 0.21
    0.20846947 = sum of:
      0.20846947 = product of:
        0.6514671 = sum of:
          0.06930482 = weight(abstract_txt:wordnet in 1462) [ClassicSimilarity], result of:
            0.06930482 = score(doc=1462,freq=1.0), product of:
              0.1432099 = queryWeight, product of:
                1.1641951 = boost
                7.7430196 = idf(docFreq=50, maxDocs=43254)
                0.015886819 = queryNorm
              0.48393872 = fieldWeight in 1462, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.7430196 = idf(docFreq=50, maxDocs=43254)
                0.0625 = fieldNorm(doc=1462)
          0.020960843 = weight(abstract_txt:each in 1462) [ClassicSimilarity], result of:
            0.020960843 = score(doc=1462,freq=1.0), product of:
              0.081298016 = queryWeight, product of:
                1.2404926 = boost
                4.125236 = idf(docFreq=1899, maxDocs=43254)
                0.015886819 = queryNorm
              0.25782725 = fieldWeight in 1462, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.125236 = idf(docFreq=1899, maxDocs=43254)
                0.0625 = fieldNorm(doc=1462)
          0.023476044 = weight(abstract_txt:document in 1462) [ClassicSimilarity], result of:
            0.023476044 = score(doc=1462,freq=1.0), product of:
              0.087678015 = queryWeight, product of:
                1.2882483 = boost
                4.2840466 = idf(docFreq=1620, maxDocs=43254)
                0.015886819 = queryNorm
              0.26775292 = fieldWeight in 1462, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.2840466 = idf(docFreq=1620, maxDocs=43254)
                0.0625 = fieldNorm(doc=1462)
          0.12533839 = weight(abstract_txt:ontology in 1462) [ClassicSimilarity], result of:
            0.12533839 = score(doc=1462,freq=6.0), product of:
              0.14739399 = queryWeight, product of:
                1.6702985 = boost
                5.554548 = idf(docFreq=454, maxDocs=43254)
                0.015886819 = queryNorm
              0.850363 = fieldWeight in 1462, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                5.554548 = idf(docFreq=454, maxDocs=43254)
                0.0625 = fieldNorm(doc=1462)
          0.06048074 = weight(abstract_txt:concepts in 1462) [ClassicSimilarity], result of:
            0.06048074 = score(doc=1462,freq=2.0), product of:
              0.14970602 = queryWeight, product of:
                2.0616715 = boost
                4.570701 = idf(docFreq=1216, maxDocs=43254)
                0.015886819 = queryNorm
              0.4039967 = fieldWeight in 1462, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.570701 = idf(docFreq=1216, maxDocs=43254)
                0.0625 = fieldNorm(doc=1462)
          0.0320953 = weight(abstract_txt:from in 1462) [ClassicSimilarity], result of:
            0.0320953 = score(doc=1462,freq=4.0), product of:
              0.0923411 = queryWeight, product of:
                2.0903633 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.015886819 = queryNorm
              0.34757328 = fieldWeight in 1462, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.0625 = fieldNorm(doc=1462)
          0.15977384 = weight(abstract_txt:taxonomy in 1462) [ClassicSimilarity], result of:
            0.15977384 = score(doc=1462,freq=1.0), product of:
              0.39672345 = queryWeight, product of:
                3.8753698 = boost
                6.4437366 = idf(docFreq=186, maxDocs=43254)
                0.015886819 = queryNorm
              0.40273353 = fieldWeight in 1462, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.4437366 = idf(docFreq=186, maxDocs=43254)
                0.0625 = fieldNorm(doc=1462)
          0.16003707 = weight(abstract_txt:base in 1462) [ClassicSimilarity], result of:
            0.16003707 = score(doc=1462,freq=1.0), product of:
              0.45463365 = queryWeight, product of:
                5.0809584 = boost
                5.632212 = idf(docFreq=420, maxDocs=43254)
                0.015886819 = queryNorm
              0.35201326 = fieldWeight in 1462, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.632212 = idf(docFreq=420, maxDocs=43254)
                0.0625 = fieldNorm(doc=1462)
        0.32 = coord(8/25)
    
  4. Lhadj, L.S.; Boughanem, M.; Amrouche, K.: Enhancing information retrieval through concept-based language modeling and semantic smoothing (2016) 0.18
    0.1818614 = sum of:
      0.1818614 = product of:
        0.5683169 = sum of:
          0.017641202 = weight(abstract_txt:retrieval in 4686) [ClassicSimilarity], result of:
            0.017641202 = score(doc=4686,freq=2.0), product of:
              0.057519644 = queryWeight, product of:
                1.0434276 = boost
                3.4699 = idf(docFreq=3658, maxDocs=43254)
                0.015886819 = queryNorm
              0.3066987 = fieldWeight in 4686, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.4699 = idf(docFreq=3658, maxDocs=43254)
                0.0625 = fieldNorm(doc=4686)
          0.015819324 = weight(abstract_txt:approach in 4686) [ClassicSimilarity], result of:
            0.015819324 = score(doc=4686,freq=1.0), product of:
              0.067390606 = queryWeight, product of:
                1.1294159 = boost
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.015886819 = queryNorm
              0.23474078 = fieldWeight in 4686, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.0625 = fieldNorm(doc=4686)
          0.020960843 = weight(abstract_txt:each in 4686) [ClassicSimilarity], result of:
            0.020960843 = score(doc=4686,freq=1.0), product of:
              0.081298016 = queryWeight, product of:
                1.2404926 = boost
                4.125236 = idf(docFreq=1899, maxDocs=43254)
                0.015886819 = queryNorm
              0.25782725 = fieldWeight in 4686, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.125236 = idf(docFreq=1899, maxDocs=43254)
                0.0625 = fieldNorm(doc=4686)
          0.023476044 = weight(abstract_txt:document in 4686) [ClassicSimilarity], result of:
            0.023476044 = score(doc=4686,freq=1.0), product of:
              0.087678015 = queryWeight, product of:
                1.2882483 = boost
                4.2840466 = idf(docFreq=1620, maxDocs=43254)
                0.015886819 = queryNorm
              0.26775292 = fieldWeight in 4686, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.2840466 = idf(docFreq=1620, maxDocs=43254)
                0.0625 = fieldNorm(doc=4686)
          0.1431181 = weight(abstract_txt:polysemy in 4686) [ClassicSimilarity], result of:
            0.1431181 = score(doc=4686,freq=2.0), product of:
              0.18432482 = queryWeight, product of:
                1.320782 = boost
                8.784473 = idf(docFreq=17, maxDocs=43254)
                0.015886819 = queryNorm
              0.7764451 = fieldWeight in 4686, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.784473 = idf(docFreq=17, maxDocs=43254)
                0.0625 = fieldNorm(doc=4686)
          0.06048074 = weight(abstract_txt:concepts in 4686) [ClassicSimilarity], result of:
            0.06048074 = score(doc=4686,freq=2.0), product of:
              0.14970602 = queryWeight, product of:
                2.0616715 = boost
                4.570701 = idf(docFreq=1216, maxDocs=43254)
                0.015886819 = queryNorm
              0.4039967 = fieldWeight in 4686, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.570701 = idf(docFreq=1216, maxDocs=43254)
                0.0625 = fieldNorm(doc=4686)
          0.027795343 = weight(abstract_txt:from in 4686) [ClassicSimilarity], result of:
            0.027795343 = score(doc=4686,freq=3.0), product of:
              0.0923411 = queryWeight, product of:
                2.0903633 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.015886819 = queryNorm
              0.30100727 = fieldWeight in 4686, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.0625 = fieldNorm(doc=4686)
          0.25902528 = weight(abstract_txt:synonymy in 4686) [ClassicSimilarity], result of:
            0.25902528 = score(doc=4686,freq=2.0), product of:
              0.3448992 = queryWeight, product of:
                2.5550554 = boost
                8.496791 = idf(docFreq=23, maxDocs=43254)
                0.015886819 = queryNorm
              0.7510173 = fieldWeight in 4686, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.496791 = idf(docFreq=23, maxDocs=43254)
                0.0625 = fieldNorm(doc=4686)
        0.32 = coord(8/25)
    
  5. Chaudhry, A.S.; Jiun, T.P.: Enhancing access to digital information resources on heritage : a case of development of a taxonomy at the Integrated Museum and Archives System in Singapore (2005) 0.17
    0.16822588 = sum of:
      0.16822588 = product of:
        0.6008067 = sum of:
          0.015819324 = weight(abstract_txt:approach in 584) [ClassicSimilarity], result of:
            0.015819324 = score(doc=584,freq=1.0), product of:
              0.067390606 = queryWeight, product of:
                1.1294159 = boost
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.015886819 = queryNorm
              0.23474078 = fieldWeight in 584, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7558525 = idf(docFreq=2748, maxDocs=43254)
                0.0625 = fieldNorm(doc=584)
          0.020960843 = weight(abstract_txt:each in 584) [ClassicSimilarity], result of:
            0.020960843 = score(doc=584,freq=1.0), product of:
              0.081298016 = queryWeight, product of:
                1.2404926 = boost
                4.125236 = idf(docFreq=1899, maxDocs=43254)
                0.015886819 = queryNorm
              0.25782725 = fieldWeight in 584, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.125236 = idf(docFreq=1899, maxDocs=43254)
                0.0625 = fieldNorm(doc=584)
          0.028916927 = weight(abstract_txt:framework in 584) [ClassicSimilarity], result of:
            0.028916927 = score(doc=584,freq=1.0), product of:
              0.100749336 = queryWeight, product of:
                1.3809416 = boost
                4.5922966 = idf(docFreq=1190, maxDocs=43254)
                0.015886819 = queryNorm
              0.28701854 = fieldWeight in 584, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.5922966 = idf(docFreq=1190, maxDocs=43254)
                0.0625 = fieldNorm(doc=584)
          0.051169183 = weight(abstract_txt:ontology in 584) [ClassicSimilarity], result of:
            0.051169183 = score(doc=584,freq=1.0), product of:
              0.14739399 = queryWeight, product of:
                1.6702985 = boost
                5.554548 = idf(docFreq=454, maxDocs=43254)
                0.015886819 = queryNorm
              0.34715924 = fieldWeight in 584, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.554548 = idf(docFreq=454, maxDocs=43254)
                0.0625 = fieldNorm(doc=584)
          0.06048074 = weight(abstract_txt:concepts in 584) [ClassicSimilarity], result of:
            0.06048074 = score(doc=584,freq=2.0), product of:
              0.14970602 = queryWeight, product of:
                2.0616715 = boost
                4.570701 = idf(docFreq=1216, maxDocs=43254)
                0.015886819 = queryNorm
              0.4039967 = fieldWeight in 584, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.570701 = idf(docFreq=1216, maxDocs=43254)
                0.0625 = fieldNorm(doc=584)
          0.0320953 = weight(abstract_txt:from in 584) [ClassicSimilarity], result of:
            0.0320953 = score(doc=584,freq=4.0), product of:
              0.0923411 = queryWeight, product of:
                2.0903633 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.015886819 = queryNorm
              0.34757328 = fieldWeight in 584, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.0625 = fieldNorm(doc=584)
          0.3913644 = weight(abstract_txt:taxonomy in 584) [ClassicSimilarity], result of:
            0.3913644 = score(doc=584,freq=6.0), product of:
              0.39672345 = queryWeight, product of:
                3.8753698 = boost
                6.4437366 = idf(docFreq=186, maxDocs=43254)
                0.015886819 = queryNorm
              0.9864917 = fieldWeight in 584, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                6.4437366 = idf(docFreq=186, maxDocs=43254)
                0.0625 = fieldNorm(doc=584)
        0.28 = coord(7/25)