Document (#41304)

Author
Zarrad, R.
Doggaz, N.
Zagrouba, E.
Title
Wikipedia HTML structure analysis for ontology construction
Source
Knowledge organization. 45(2018) no.2, S.108-124
Year
2018
Abstract
Previously, the main problem of information extraction was to gather enough data. Today, the challenge is not to collect data but to interpret and represent them in order to deduce information. Ontologies are considered suitable solutions for organizing information. The classic methods for ontology construction from textual documents rely on natural language analysis and are generally based on statistical or linguistic approaches. However, these approaches do not consider the document structure which provides additional knowledge. In fact, the structural organization of documents also conveys meaning. In this context, new approaches focus on document structure analysis to extract knowledge. This paper describes a methodology for ontology construction from web data and especially from Wikipedia articles. It focuses mainly on document structure in order to extract the main concepts and their relations. The proposed methods extract not only taxonomic and non-taxonomic relations but also give the labels describing non-taxonomic relations. The extraction of non-taxonomic relations is established by analyzing the titles hierarchy in each document. A pattern matching is also applied in order to extract known semantic relations. We propose also to apply a refinement to the extracted relations in order to keep only those that are relevant. The refinement process is performed by applying the transitive property, checking the nature of the relations and analyzing taxonomic relations having inverted arguments. Experiments have been performed on French Wikipedia articles related to the medical field. Ontology evaluation is performed by comparing it to gold standards.
Theme
Klassifikationstheorie: Elemente / Struktur
Object
Wikipedia

Similar documents (content)

  1. El idrissi esserhrouchni, O. et al.; Frikh, B.; Ouhbi, B.: OntologyLine : a new framework for learning non-taxonomic relations of domain ontology (2016) 0.42
    0.4167447 = sum of:
      0.4167447 = product of:
        1.488374 = sum of:
          0.008867665 = weight(abstract_txt:from in 4844) [ClassicSimilarity], result of:
            0.008867665 = score(doc=4844,freq=1.0), product of:
              0.04082093 = queryWeight, product of:
                1.0012891 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.014661791 = queryNorm
              0.2172333 = fieldWeight in 4844, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.078125 = fieldNorm(doc=4844)
          0.06588648 = weight(abstract_txt:extraction in 4844) [ClassicSimilarity], result of:
            0.06588648 = score(doc=4844,freq=1.0), product of:
              0.13578251 = queryWeight, product of:
                1.4910573 = boost
                6.2110133 = idf(docFreq=235, maxDocs=43254)
                0.014661791 = queryNorm
              0.48523542 = fieldWeight in 4844, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.2110133 = idf(docFreq=235, maxDocs=43254)
                0.078125 = fieldNorm(doc=4844)
          0.068201445 = weight(abstract_txt:construction in 4844) [ClassicSimilarity], result of:
            0.068201445 = score(doc=4844,freq=1.0), product of:
              0.15905198 = queryWeight, product of:
                1.976458 = boost
                5.4886365 = idf(docFreq=485, maxDocs=43254)
                0.014661791 = queryNorm
              0.42879972 = fieldWeight in 4844, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.4886365 = idf(docFreq=485, maxDocs=43254)
                0.078125 = fieldNorm(doc=4844)
          0.1885016 = weight(abstract_txt:ontology in 4844) [ClassicSimilarity], result of:
            0.1885016 = score(doc=4844,freq=4.0), product of:
              0.21719323 = queryWeight, product of:
                2.6669235 = boost
                5.554548 = idf(docFreq=454, maxDocs=43254)
                0.014661791 = queryNorm
              0.8678981 = fieldWeight in 4844, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.554548 = idf(docFreq=454, maxDocs=43254)
                0.078125 = fieldNorm(doc=4844)
          0.15854149 = weight(abstract_txt:extract in 4844) [ClassicSimilarity], result of:
            0.15854149 = score(doc=4844,freq=1.0), product of:
              0.30719787 = queryWeight, product of:
                3.1717322 = boost
                6.605941 = idf(docFreq=158, maxDocs=43254)
                0.014661791 = queryNorm
              0.51608914 = fieldWeight in 4844, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.605941 = idf(docFreq=158, maxDocs=43254)
                0.078125 = fieldNorm(doc=4844)
          0.6182063 = weight(abstract_txt:taxonomic in 4844) [ClassicSimilarity], result of:
            0.6182063 = score(doc=4844,freq=3.0), product of:
              0.56842715 = queryWeight, product of:
                4.8236947 = boost
                8.037259 = idf(docFreq=37, maxDocs=43254)
                0.014661791 = queryNorm
              1.0875735 = fieldWeight in 4844, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                8.037259 = idf(docFreq=37, maxDocs=43254)
                0.078125 = fieldNorm(doc=4844)
          0.38016888 = weight(abstract_txt:relations in 4844) [ClassicSimilarity], result of:
            0.38016888 = score(doc=4844,freq=4.0), product of:
              0.43681479 = queryWeight, product of:
                5.348735 = boost
                5.5700517 = idf(docFreq=447, maxDocs=43254)
                0.014661791 = queryNorm
              0.87032056 = fieldWeight in 4844, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.5700517 = idf(docFreq=447, maxDocs=43254)
                0.078125 = fieldNorm(doc=4844)
        0.28 = coord(7/25)
    
  2. Jiang, X.; Tan, A.-H.: CRCTOL: a semantic-based domain ontology learning system (2009) 0.39
    0.38639984 = sum of:
      0.38639984 = product of:
        0.96599954 = sum of:
          0.019675529 = weight(abstract_txt:methods in 321) [ClassicSimilarity], result of:
            0.019675529 = score(doc=321,freq=2.0), product of:
              0.061073832 = queryWeight, product of:
                4.1655097 = idf(docFreq=1824, maxDocs=43254)
                0.014661791 = queryNorm
              0.3221597 = fieldWeight in 321, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.1655097 = idf(docFreq=1824, maxDocs=43254)
                0.0546875 = fieldNorm(doc=321)
          0.010751472 = weight(abstract_txt:from in 321) [ClassicSimilarity], result of:
            0.010751472 = score(doc=321,freq=3.0), product of:
              0.04082093 = queryWeight, product of:
                1.0012891 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.014661791 = queryNorm
              0.26338136 = fieldWeight in 321, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.0546875 = fieldNorm(doc=321)
          0.014734034 = weight(abstract_txt:only in 321) [ClassicSimilarity], result of:
            0.014734034 = score(doc=321,freq=1.0), product of:
              0.06345444 = queryWeight, product of:
                1.0193033 = boost
                4.245918 = idf(docFreq=1683, maxDocs=43254)
                0.014661791 = queryNorm
              0.23219863 = fieldWeight in 321, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.245918 = idf(docFreq=1683, maxDocs=43254)
                0.0546875 = fieldNorm(doc=321)
          0.042951625 = weight(abstract_txt:analyzing in 321) [ClassicSimilarity], result of:
            0.042951625 = score(doc=321,freq=1.0), product of:
              0.12948933 = queryWeight, product of:
                1.4560939 = boost
                6.0653734 = idf(docFreq=272, maxDocs=43254)
                0.014661791 = queryNorm
              0.33170012 = fieldWeight in 321, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.0653734 = idf(docFreq=272, maxDocs=43254)
                0.0546875 = fieldNorm(doc=321)
          0.046120536 = weight(abstract_txt:extraction in 321) [ClassicSimilarity], result of:
            0.046120536 = score(doc=321,freq=1.0), product of:
              0.13578251 = queryWeight, product of:
                1.4910573 = boost
                6.2110133 = idf(docFreq=235, maxDocs=43254)
                0.014661791 = queryNorm
              0.3396648 = fieldWeight in 321, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.2110133 = idf(docFreq=235, maxDocs=43254)
                0.0546875 = fieldNorm(doc=321)
          0.0302691 = weight(abstract_txt:document in 321) [ClassicSimilarity], result of:
            0.0302691 = score(doc=321,freq=1.0), product of:
              0.12919843 = queryWeight, product of:
                2.0569136 = boost
                4.2840466 = idf(docFreq=1620, maxDocs=43254)
                0.014661791 = queryNorm
              0.2342838 = fieldWeight in 321, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.2840466 = idf(docFreq=1620, maxDocs=43254)
                0.0546875 = fieldNorm(doc=321)
          0.1745549 = weight(abstract_txt:ontology in 321) [ClassicSimilarity], result of:
            0.1745549 = score(doc=321,freq=7.0), product of:
              0.21719323 = queryWeight, product of:
                2.6669235 = boost
                5.554548 = idf(docFreq=454, maxDocs=43254)
                0.014661791 = queryNorm
              0.80368483 = fieldWeight in 321, product of:
                2.6457512 = tf(freq=7.0), with freq of:
                  7.0 = termFreq=7.0
                5.554548 = idf(docFreq=454, maxDocs=43254)
                0.0546875 = fieldNorm(doc=321)
          0.110979035 = weight(abstract_txt:extract in 321) [ClassicSimilarity], result of:
            0.110979035 = score(doc=321,freq=1.0), product of:
              0.30719787 = queryWeight, product of:
                3.1717322 = boost
                6.605941 = idf(docFreq=158, maxDocs=43254)
                0.014661791 = queryNorm
              0.36126238 = fieldWeight in 321, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.605941 = idf(docFreq=158, maxDocs=43254)
                0.0546875 = fieldNorm(doc=321)
          0.24984512 = weight(abstract_txt:taxonomic in 321) [ClassicSimilarity], result of:
            0.24984512 = score(doc=321,freq=1.0), product of:
              0.56842715 = queryWeight, product of:
                4.8236947 = boost
                8.037259 = idf(docFreq=37, maxDocs=43254)
                0.014661791 = queryNorm
              0.4395376 = fieldWeight in 321, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.037259 = idf(docFreq=37, maxDocs=43254)
                0.0546875 = fieldNorm(doc=321)
          0.26611823 = weight(abstract_txt:relations in 321) [ClassicSimilarity], result of:
            0.26611823 = score(doc=321,freq=4.0), product of:
              0.43681479 = queryWeight, product of:
                5.348735 = boost
                5.5700517 = idf(docFreq=447, maxDocs=43254)
                0.014661791 = queryNorm
              0.6092244 = fieldWeight in 321, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.5700517 = idf(docFreq=447, maxDocs=43254)
                0.0546875 = fieldNorm(doc=321)
        0.4 = coord(10/25)
    
  3. Xu, Y.; Li, G.; Mou, L.; Lu, Y.: Learning non-taxonomic relations on demand for ontology extension (2014) 0.32
    0.3188551 = sum of:
      0.3188551 = product of:
        1.328563 = sum of:
          0.052709185 = weight(abstract_txt:extraction in 4426) [ClassicSimilarity], result of:
            0.052709185 = score(doc=4426,freq=1.0), product of:
              0.13578251 = queryWeight, product of:
                1.4910573 = boost
                6.2110133 = idf(docFreq=235, maxDocs=43254)
                0.014661791 = queryNorm
              0.38818833 = fieldWeight in 4426, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.2110133 = idf(docFreq=235, maxDocs=43254)
                0.0625 = fieldNorm(doc=4426)
          0.046632364 = weight(abstract_txt:approaches in 4426) [ClassicSimilarity], result of:
            0.046632364 = score(doc=4426,freq=2.0), product of:
              0.11369246 = queryWeight, product of:
                1.6710286 = boost
                4.640457 = idf(docFreq=1134, maxDocs=43254)
                0.014661791 = queryNorm
              0.41016233 = fieldWeight in 4426, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.640457 = idf(docFreq=1134, maxDocs=43254)
                0.0625 = fieldNorm(doc=4426)
          0.08177521 = weight(abstract_txt:wikipedia in 4426) [ClassicSimilarity], result of:
            0.08177521 = score(doc=4426,freq=1.0), product of:
              0.20830409 = queryWeight, product of:
                2.2618663 = boost
                6.2812176 = idf(docFreq=219, maxDocs=43254)
                0.014661791 = queryNorm
              0.3925761 = fieldWeight in 4426, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.2812176 = idf(docFreq=219, maxDocs=43254)
                0.0625 = fieldNorm(doc=4426)
          0.1066326 = weight(abstract_txt:ontology in 4426) [ClassicSimilarity], result of:
            0.1066326 = score(doc=4426,freq=2.0), product of:
              0.21719323 = queryWeight, product of:
                2.6669235 = boost
                5.554548 = idf(docFreq=454, maxDocs=43254)
                0.014661791 = queryNorm
              0.4909573 = fieldWeight in 4426, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.554548 = idf(docFreq=454, maxDocs=43254)
                0.0625 = fieldNorm(doc=4426)
          0.6384807 = weight(abstract_txt:taxonomic in 4426) [ClassicSimilarity], result of:
            0.6384807 = score(doc=4426,freq=5.0), product of:
              0.56842715 = queryWeight, product of:
                4.8236947 = boost
                8.037259 = idf(docFreq=37, maxDocs=43254)
                0.014661791 = queryNorm
              1.1232411 = fieldWeight in 4426, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                8.037259 = idf(docFreq=37, maxDocs=43254)
                0.0625 = fieldNorm(doc=4426)
          0.40233293 = weight(abstract_txt:relations in 4426) [ClassicSimilarity], result of:
            0.40233293 = score(doc=4426,freq=7.0), product of:
              0.43681479 = queryWeight, product of:
                5.348735 = boost
                5.5700517 = idf(docFreq=447, maxDocs=43254)
                0.014661791 = queryNorm
              0.9210607 = fieldWeight in 4426, product of:
                2.6457512 = tf(freq=7.0), with freq of:
                  7.0 = termFreq=7.0
                5.5700517 = idf(docFreq=447, maxDocs=43254)
                0.0625 = fieldNorm(doc=4426)
        0.24 = coord(6/25)
    
  4. Suchanek, F.M.; Kasneci, G.; Weikum, G.: YAGO: a core of semantic knowledge unifying WordNet and Wikipedia (2007) 0.31
    0.30889088 = sum of:
      0.30889088 = product of:
        0.965284 = sum of:
          0.019875284 = weight(abstract_txt:methods in 404) [ClassicSimilarity], result of:
            0.019875284 = score(doc=404,freq=1.0), product of:
              0.061073832 = queryWeight, product of:
                4.1655097 = idf(docFreq=1824, maxDocs=43254)
                0.014661791 = queryNorm
              0.32543045 = fieldWeight in 404, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.1655097 = idf(docFreq=1824, maxDocs=43254)
                0.078125 = fieldNorm(doc=404)
          0.008867665 = weight(abstract_txt:from in 404) [ClassicSimilarity], result of:
            0.008867665 = score(doc=404,freq=1.0), product of:
              0.04082093 = queryWeight, product of:
                1.0012891 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.014661791 = queryNorm
              0.2172333 = fieldWeight in 404, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.078125 = fieldNorm(doc=404)
          0.06588648 = weight(abstract_txt:extraction in 404) [ClassicSimilarity], result of:
            0.06588648 = score(doc=404,freq=1.0), product of:
              0.13578251 = queryWeight, product of:
                1.4910573 = boost
                6.2110133 = idf(docFreq=235, maxDocs=43254)
                0.014661791 = queryNorm
              0.48523542 = fieldWeight in 404, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.2110133 = idf(docFreq=235, maxDocs=43254)
                0.078125 = fieldNorm(doc=404)
          0.048443176 = weight(abstract_txt:order in 404) [ClassicSimilarity], result of:
            0.048443176 = score(doc=404,freq=1.0), product of:
              0.1393621 = queryWeight, product of:
                2.1362877 = boost
                4.4493637 = idf(docFreq=1373, maxDocs=43254)
                0.014661791 = queryNorm
              0.34760654 = fieldWeight in 404, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.4493637 = idf(docFreq=1373, maxDocs=43254)
                0.078125 = fieldNorm(doc=404)
          0.10221901 = weight(abstract_txt:wikipedia in 404) [ClassicSimilarity], result of:
            0.10221901 = score(doc=404,freq=1.0), product of:
              0.20830409 = queryWeight, product of:
                2.2618663 = boost
                6.2812176 = idf(docFreq=219, maxDocs=43254)
                0.014661791 = queryNorm
              0.49072012 = fieldWeight in 404, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.2812176 = idf(docFreq=219, maxDocs=43254)
                0.078125 = fieldNorm(doc=404)
          0.0942508 = weight(abstract_txt:ontology in 404) [ClassicSimilarity], result of:
            0.0942508 = score(doc=404,freq=1.0), product of:
              0.21719323 = queryWeight, product of:
                2.6669235 = boost
                5.554548 = idf(docFreq=454, maxDocs=43254)
                0.014661791 = queryNorm
              0.43394905 = fieldWeight in 404, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.554548 = idf(docFreq=454, maxDocs=43254)
                0.078125 = fieldNorm(doc=404)
          0.35692158 = weight(abstract_txt:taxonomic in 404) [ClassicSimilarity], result of:
            0.35692158 = score(doc=404,freq=1.0), product of:
              0.56842715 = queryWeight, product of:
                4.8236947 = boost
                8.037259 = idf(docFreq=37, maxDocs=43254)
                0.014661791 = queryNorm
              0.62791085 = fieldWeight in 404, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.037259 = idf(docFreq=37, maxDocs=43254)
                0.078125 = fieldNorm(doc=404)
          0.26882 = weight(abstract_txt:relations in 404) [ClassicSimilarity], result of:
            0.26882 = score(doc=404,freq=2.0), product of:
              0.43681479 = queryWeight, product of:
                5.348735 = boost
                5.5700517 = idf(docFreq=447, maxDocs=43254)
                0.014661791 = queryNorm
              0.61540955 = fieldWeight in 404, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.5700517 = idf(docFreq=447, maxDocs=43254)
                0.078125 = fieldNorm(doc=404)
        0.32 = coord(8/25)
    
  5. Bounhas, I.; Elayeb, B.; Evrard, F.; Slimani, Y.: Organizing contextual knowledge for Arabic text disambiguation and terminology extraction (2011) 0.28
    0.28417453 = sum of:
      0.28417453 = product of:
        0.7104363 = sum of:
          0.0070941322 = weight(abstract_txt:from in 1311) [ClassicSimilarity], result of:
            0.0070941322 = score(doc=1311,freq=1.0), product of:
              0.04082093 = queryWeight, product of:
                1.0012891 = boost
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.014661791 = queryNorm
              0.17378664 = fieldWeight in 1311, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.7805862 = idf(docFreq=7289, maxDocs=43254)
                0.0625 = fieldNorm(doc=1311)
          0.09129499 = weight(abstract_txt:extraction in 1311) [ClassicSimilarity], result of:
            0.09129499 = score(doc=1311,freq=3.0), product of:
              0.13578251 = queryWeight, product of:
                1.4910573 = boost
                6.2110133 = idf(docFreq=235, maxDocs=43254)
                0.014661791 = queryNorm
              0.6723619 = fieldWeight in 1311, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.2110133 = idf(docFreq=235, maxDocs=43254)
                0.0625 = fieldNorm(doc=1311)
          0.017580593 = weight(abstract_txt:also in 1311) [ClassicSimilarity], result of:
            0.017580593 = score(doc=1311,freq=1.0), product of:
              0.0822783 = queryWeight, product of:
                1.6414591 = boost
                3.418757 = idf(docFreq=3850, maxDocs=43254)
                0.014661791 = queryNorm
              0.21367231 = fieldWeight in 1311, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.418757 = idf(docFreq=3850, maxDocs=43254)
                0.0625 = fieldNorm(doc=1311)
          0.046632364 = weight(abstract_txt:approaches in 1311) [ClassicSimilarity], result of:
            0.046632364 = score(doc=1311,freq=2.0), product of:
              0.11369246 = queryWeight, product of:
                1.6710286 = boost
                4.640457 = idf(docFreq=1134, maxDocs=43254)
                0.014661791 = queryNorm
              0.41016233 = fieldWeight in 1311, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.640457 = idf(docFreq=1134, maxDocs=43254)
                0.0625 = fieldNorm(doc=1311)
          0.054561157 = weight(abstract_txt:construction in 1311) [ClassicSimilarity], result of:
            0.054561157 = score(doc=1311,freq=1.0), product of:
              0.15905198 = queryWeight, product of:
                1.976458 = boost
                5.4886365 = idf(docFreq=485, maxDocs=43254)
                0.014661791 = queryNorm
              0.34303978 = fieldWeight in 1311, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.4886365 = idf(docFreq=485, maxDocs=43254)
                0.0625 = fieldNorm(doc=1311)
          0.034593258 = weight(abstract_txt:document in 1311) [ClassicSimilarity], result of:
            0.034593258 = score(doc=1311,freq=1.0), product of:
              0.12919843 = queryWeight, product of:
                2.0569136 = boost
                4.2840466 = idf(docFreq=1620, maxDocs=43254)
                0.014661791 = queryNorm
              0.26775292 = fieldWeight in 1311, 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=1311)
          0.051842414 = weight(abstract_txt:structure in 1311) [ClassicSimilarity], result of:
            0.051842414 = score(doc=1311,freq=2.0), product of:
              0.13428982 = queryWeight, product of:
                2.097051 = boost
                4.367643 = idf(docFreq=1490, maxDocs=43254)
                0.014661791 = queryNorm
              0.38604873 = fieldWeight in 1311, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.367643 = idf(docFreq=1490, maxDocs=43254)
                0.0625 = fieldNorm(doc=1311)
          0.075400636 = weight(abstract_txt:ontology in 1311) [ClassicSimilarity], result of:
            0.075400636 = score(doc=1311,freq=1.0), product of:
              0.21719323 = queryWeight, product of:
                2.6669235 = boost
                5.554548 = idf(docFreq=454, maxDocs=43254)
                0.014661791 = queryNorm
              0.34715924 = fieldWeight in 1311, 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=1311)
          0.1793692 = weight(abstract_txt:extract in 1311) [ClassicSimilarity], result of:
            0.1793692 = score(doc=1311,freq=2.0), product of:
              0.30719787 = queryWeight, product of:
                3.1717322 = boost
                6.605941 = idf(docFreq=158, maxDocs=43254)
                0.014661791 = queryNorm
              0.5838882 = fieldWeight in 1311, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.605941 = idf(docFreq=158, maxDocs=43254)
                0.0625 = fieldNorm(doc=1311)
          0.15206756 = weight(abstract_txt:relations in 1311) [ClassicSimilarity], result of:
            0.15206756 = score(doc=1311,freq=1.0), product of:
              0.43681479 = queryWeight, product of:
                5.348735 = boost
                5.5700517 = idf(docFreq=447, maxDocs=43254)
                0.014661791 = queryNorm
              0.34812823 = fieldWeight in 1311, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5700517 = idf(docFreq=447, maxDocs=43254)
                0.0625 = fieldNorm(doc=1311)
        0.4 = coord(10/25)