Document (#42268)

Author

Naskar, D.
Das, S.

Title

HNS ontology using faceted approach

Source

Knowledge organization. 46(2019) no.3, S.187-198

Year

2019

Abstract

The purpose of this research is to develop an ontology with subsequent testing and evaluation, for identifying utility and value. The domain that has been chosen is human nervous system (HNS) disorders. It is hypothesized here that an ontology-based patient records management system is more effective in meeting and addressing complex information needs of health-care personnel. Therefore, this study has been based on the premise that developing an ontology and using it as a component of the search interface in hospital records management systems will lead to more efficient and effective management of health-care.It is proposed here to develop an ontology of the domain of HNS disorders using a standard vocabulary such as MeSH or SNOMED CT. The principal classes of an ontology include facet analysis for arranging concepts based on their common characteristics to build mutually exclusive classes. We combine faceted theory with description logic, which helps us to better query and retrieve data by implementing an ontological model. Protégé 5.2.0 was used as ontology editor. The use of ontologies for domain modelling will be of acute help to doctors for searching patient records. In this paper we show how the faceted approach helps us to build a flexible model and retrieve better information. We use the medical domain as a case study to show examples and implementation.

Content

DOI:10.5771/0943-7444-2019-3-187.

Theme

Wissensrepräsentation

Field

Medizin

Similar documents (content)

1. Madalli, D.P.; Balaji, B.P.; Sarangi, A.K.: Music domain analysis for building faceted ontological representation (2014) 0.32

   0.31630757 = sum of:
     0.31630757 = product of:
       1.1296699 = sum of:
         0.023879232 = weight(abstract_txt:based in 1437) [ClassicSimilarity], result of:
           0.023879232 = score(doc=1437,freq=1.0), product of:
             0.06848474 = queryWeight, product of:
               1.0991396 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.019544857 = queryNorm
             0.3486796 = fieldWeight in 1437, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.109375 = fieldNorm(doc=1437)
         0.055580545 = weight(abstract_txt:effective in 1437) [ClassicSimilarity], result of:
           0.055580545 = score(doc=1437,freq=1.0), product of:
             0.10507475 = queryWeight, product of:
               1.111628 = boost
               4.8362236 = idf(docFreq=953, maxDocs=44218)
               0.019544857 = queryNorm
             0.52896196 = fieldWeight in 1437, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.8362236 = idf(docFreq=953, maxDocs=44218)
               0.109375 = fieldNorm(doc=1437)
         0.09913082 = weight(abstract_txt:build in 1437) [ClassicSimilarity], result of:
           0.09913082 = score(doc=1437,freq=1.0), product of:
             0.15453337 = queryWeight, product of:
               1.3480979 = boost
               5.8650045 = idf(docFreq=340, maxDocs=44218)
               0.019544857 = queryNorm
             0.64148486 = fieldWeight in 1437, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8650045 = idf(docFreq=340, maxDocs=44218)
               0.109375 = fieldNorm(doc=1437)
         0.13659203 = weight(abstract_txt:helps in 1437) [ClassicSimilarity], result of:
           0.13659203 = score(doc=1437,freq=1.0), product of:
             0.19135217 = queryWeight, product of:
               1.5001235 = boost
               6.5264034 = idf(docFreq=175, maxDocs=44218)
               0.019544857 = queryNorm
             0.71382535 = fieldWeight in 1437, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.5264034 = idf(docFreq=175, maxDocs=44218)
               0.109375 = fieldNorm(doc=1437)
         0.31468943 = weight(abstract_txt:faceted in 1437) [ClassicSimilarity], result of:
           0.31468943 = score(doc=1437,freq=4.0), product of:
             0.24070309 = queryWeight, product of:
               2.0606146 = boost
               5.9765754 = idf(docFreq=304, maxDocs=44218)
               0.019544857 = queryNorm
             1.3073759 = fieldWeight in 1437, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.9765754 = idf(docFreq=304, maxDocs=44218)
               0.109375 = fieldNorm(doc=1437)
         0.20873071 = weight(abstract_txt:domain in 1437) [ClassicSimilarity], result of:
           0.20873071 = score(doc=1437,freq=4.0), product of:
             0.2014949 = queryWeight, product of:
               2.1769946 = boost
               4.7355914 = idf(docFreq=1054, maxDocs=44218)
               0.019544857 = queryNorm
             1.0359106 = fieldWeight in 1437, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.7355914 = idf(docFreq=1054, maxDocs=44218)
               0.109375 = fieldNorm(doc=1437)
         0.29106715 = weight(abstract_txt:ontology in 1437) [ClassicSimilarity], result of:
           0.29106715 = score(doc=1437,freq=1.0), product of:
             0.4810992 = queryWeight, product of:
               4.4500165 = boost
               5.5314693 = idf(docFreq=475, maxDocs=44218)
               0.019544857 = queryNorm
             0.60500443 = fieldWeight in 1437, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5314693 = idf(docFreq=475, maxDocs=44218)
               0.109375 = fieldNorm(doc=1437)
       0.28 = coord(7/25)
   

2. Raghavan, K.S.; Sajana, C.: NeurOn: modeling ontology for neurosurgery 0.30

   0.301529 = sum of:
     0.301529 = product of:
       1.0768893 = sum of:
         0.020467913 = weight(abstract_txt:based in 3534) [ClassicSimilarity], result of:
           0.020467913 = score(doc=3534,freq=1.0), product of:
             0.06848474 = queryWeight, product of:
               1.0991396 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.019544857 = queryNorm
             0.29886824 = fieldWeight in 3534, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.09375 = fieldNorm(doc=3534)
         0.141509 = weight(abstract_txt:health in 3534) [ClassicSimilarity], result of:
           0.141509 = score(doc=3534,freq=3.0), product of:
             0.15054394 = queryWeight, product of:
               1.330583 = boost
               5.788804 = idf(docFreq=367, maxDocs=44218)
               0.019544857 = queryNorm
             0.9399846 = fieldWeight in 3534, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.788804 = idf(docFreq=367, maxDocs=44218)
               0.09375 = fieldNorm(doc=3534)
         0.08496927 = weight(abstract_txt:build in 3534) [ClassicSimilarity], result of:
           0.08496927 = score(doc=3534,freq=1.0), product of:
             0.15453337 = queryWeight, product of:
               1.3480979 = boost
               5.8650045 = idf(docFreq=340, maxDocs=44218)
               0.019544857 = queryNorm
             0.54984415 = fieldWeight in 3534, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8650045 = idf(docFreq=340, maxDocs=44218)
               0.09375 = fieldNorm(doc=3534)
         0.077130064 = weight(abstract_txt:records in 3534) [ClassicSimilarity], result of:
           0.077130064 = score(doc=3534,freq=2.0), product of:
             0.13162869 = queryWeight, product of:
               1.5238115 = boost
               4.4196396 = idf(docFreq=1446, maxDocs=44218)
               0.019544857 = queryNorm
             0.58596694 = fieldWeight in 3534, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.4196396 = idf(docFreq=1446, maxDocs=44218)
               0.09375 = fieldNorm(doc=3534)
         0.31053042 = weight(abstract_txt:patient in 3534) [ClassicSimilarity], result of:
           0.31053042 = score(doc=3534,freq=3.0), product of:
             0.2542202 = queryWeight, product of:
               1.7290809 = boost
               7.5225 = idf(docFreq=64, maxDocs=44218)
               0.019544857 = queryNorm
             1.2215018 = fieldWeight in 3534, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.5225 = idf(docFreq=64, maxDocs=44218)
               0.09375 = fieldNorm(doc=3534)
         0.089456014 = weight(abstract_txt:domain in 3534) [ClassicSimilarity], result of:
           0.089456014 = score(doc=3534,freq=1.0), product of:
             0.2014949 = queryWeight, product of:
               2.1769946 = boost
               4.7355914 = idf(docFreq=1054, maxDocs=44218)
               0.019544857 = queryNorm
             0.44396168 = fieldWeight in 3534, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7355914 = idf(docFreq=1054, maxDocs=44218)
               0.09375 = fieldNorm(doc=3534)
         0.35282665 = weight(abstract_txt:ontology in 3534) [ClassicSimilarity], result of:
           0.35282665 = score(doc=3534,freq=2.0), product of:
             0.4810992 = queryWeight, product of:
               4.4500165 = boost
               5.5314693 = idf(docFreq=475, maxDocs=44218)
               0.019544857 = queryNorm
             0.73337615 = fieldWeight in 3534, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.5314693 = idf(docFreq=475, maxDocs=44218)
               0.09375 = fieldNorm(doc=3534)
       0.28 = coord(7/25)
   

3. Das, S.; Naskar, D.; Roy, S.: Reorganizing educational institutional domain using faceted ontological principles (2022) 0.28

   0.2845003 = sum of:
     0.2845003 = product of:
       0.8890635 = sum of:
         0.08389884 = weight(abstract_txt:protégé in 1098) [ClassicSimilarity], result of:
           0.08389884 = score(doc=1098,freq=1.0), product of:
             0.17420627 = queryWeight, product of:
               1.0121088 = boost
               8.806516 = idf(docFreq=17, maxDocs=44218)
               0.019544857 = queryNorm
             0.48160633 = fieldWeight in 1098, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.806516 = idf(docFreq=17, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1098)
         0.037531063 = weight(abstract_txt:better in 1098) [ClassicSimilarity], result of:
           0.037531063 = score(doc=1098,freq=2.0), product of:
             0.1018952 = queryWeight, product of:
               1.09468 = boost
               4.76249 = idf(docFreq=1026, maxDocs=44218)
               0.019544857 = queryNorm
             0.36833003 = fieldWeight in 1098, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.76249 = idf(docFreq=1026, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1098)
         0.016885165 = weight(abstract_txt:based in 1098) [ClassicSimilarity], result of:
           0.016885165 = score(doc=1098,freq=2.0), product of:
             0.06848474 = queryWeight, product of:
               1.0991396 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.019544857 = queryNorm
             0.24655369 = fieldWeight in 1098, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1098)
         0.026511092 = weight(abstract_txt:using in 1098) [ClassicSimilarity], result of:
           0.026511092 = score(doc=1098,freq=3.0), product of:
             0.080818646 = queryWeight, product of:
               1.1940204 = boost
               3.4631186 = idf(docFreq=3765, maxDocs=44218)
               0.019544857 = queryNorm
             0.32803187 = fieldWeight in 1098, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.4631186 = idf(docFreq=3765, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1098)
         0.06866334 = weight(abstract_txt:classes in 1098) [ClassicSimilarity], result of:
           0.06866334 = score(doc=1098,freq=2.0), product of:
             0.1524204 = queryWeight, product of:
               1.3388498 = boost
               5.8247695 = idf(docFreq=354, maxDocs=44218)
               0.019544857 = queryNorm
             0.4504865 = fieldWeight in 1098, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.8247695 = idf(docFreq=354, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1098)
         0.07867236 = weight(abstract_txt:faceted in 1098) [ClassicSimilarity], result of:
           0.07867236 = score(doc=1098,freq=1.0), product of:
             0.24070309 = queryWeight, product of:
               2.0606146 = boost
               5.9765754 = idf(docFreq=304, maxDocs=44218)
               0.019544857 = queryNorm
             0.32684398 = fieldWeight in 1098, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.9765754 = idf(docFreq=304, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1098)
         0.11668402 = weight(abstract_txt:domain in 1098) [ClassicSimilarity], result of:
           0.11668402 = score(doc=1098,freq=5.0), product of:
             0.2014949 = queryWeight, product of:
               2.1769946 = boost
               4.7355914 = idf(docFreq=1054, maxDocs=44218)
               0.019544857 = queryNorm
             0.57909167 = fieldWeight in 1098, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.7355914 = idf(docFreq=1054, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1098)
         0.4602176 = weight(abstract_txt:ontology in 1098) [ClassicSimilarity], result of:
           0.4602176 = score(doc=1098,freq=10.0), product of:
             0.4810992 = queryWeight, product of:
               4.4500165 = boost
               5.5314693 = idf(docFreq=475, maxDocs=44218)
               0.019544857 = queryNorm
             0.9565961 = fieldWeight in 1098, product of:
               3.1622777 = tf(freq=10.0), with freq of:
                 10.0 = termFreq=10.0
               5.5314693 = idf(docFreq=475, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1098)
       0.32 = coord(8/25)
   

4. Panzer, M.: Increasing patient findability of medical research : annotating clinical trials using standard vocabularies (2017) 0.26

   0.2620896 = sum of:
     0.2620896 = product of:
       0.9360343 = sum of:
         0.030018099 = weight(abstract_txt:show in 2783) [ClassicSimilarity], result of:
           0.030018099 = score(doc=2783,freq=1.0), product of:
             0.0872082 = queryWeight, product of:
               1.012719 = boost
               4.4059124 = idf(docFreq=1466, maxDocs=44218)
               0.019544857 = queryNorm
             0.3442119 = fieldWeight in 2783, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.4059124 = idf(docFreq=1466, maxDocs=44218)
               0.078125 = fieldNorm(doc=2783)
         0.16270094 = weight(abstract_txt:snomed in 2783) [ClassicSimilarity], result of:
           0.16270094 = score(doc=2783,freq=1.0), product of:
             0.21357572 = queryWeight, product of:
               1.1206533 = boost
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.019544857 = queryNorm
             0.7617951 = fieldWeight in 2783, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.078125 = fieldNorm(doc=2783)
         0.021865983 = weight(abstract_txt:using in 2783) [ClassicSimilarity], result of:
           0.021865983 = score(doc=2783,freq=1.0), product of:
             0.080818646 = queryWeight, product of:
               1.1940204 = boost
               3.4631186 = idf(docFreq=3765, maxDocs=44218)
               0.019544857 = queryNorm
             0.27055615 = fieldWeight in 2783, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4631186 = idf(docFreq=3765, maxDocs=44218)
               0.078125 = fieldNorm(doc=2783)
         0.09628468 = weight(abstract_txt:health in 2783) [ClassicSimilarity], result of:
           0.09628468 = score(doc=2783,freq=2.0), product of:
             0.15054394 = queryWeight, product of:
               1.330583 = boost
               5.788804 = idf(docFreq=367, maxDocs=44218)
               0.019544857 = queryNorm
             0.6395786 = fieldWeight in 2783, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.788804 = idf(docFreq=367, maxDocs=44218)
               0.078125 = fieldNorm(doc=2783)
         0.040158268 = weight(abstract_txt:management in 2783) [ClassicSimilarity], result of:
           0.040158268 = score(doc=2783,freq=1.0), product of:
             0.121203616 = queryWeight, product of:
               1.4622234 = boost
               4.2410107 = idf(docFreq=1729, maxDocs=44218)
               0.019544857 = queryNorm
             0.33132896 = fieldWeight in 2783, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2410107 = idf(docFreq=1729, maxDocs=44218)
               0.078125 = fieldNorm(doc=2783)
         0.2909841 = weight(abstract_txt:disorders in 2783) [ClassicSimilarity], result of:
           0.2909841 = score(doc=2783,freq=1.0), product of:
             0.39647397 = queryWeight, product of:
               2.1593232 = boost
               9.394302 = idf(docFreq=9, maxDocs=44218)
               0.019544857 = queryNorm
             0.7339299 = fieldWeight in 2783, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.394302 = idf(docFreq=9, maxDocs=44218)
               0.078125 = fieldNorm(doc=2783)
         0.29402223 = weight(abstract_txt:ontology in 2783) [ClassicSimilarity], result of:
           0.29402223 = score(doc=2783,freq=2.0), product of:
             0.4810992 = queryWeight, product of:
               4.4500165 = boost
               5.5314693 = idf(docFreq=475, maxDocs=44218)
               0.019544857 = queryNorm
             0.6111468 = fieldWeight in 2783, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.5314693 = idf(docFreq=475, maxDocs=44218)
               0.078125 = fieldNorm(doc=2783)
       0.28 = coord(7/25)
   

5. Pinto, V.B.; Rabelo, C.R. de Oliveira; Girão, I.P.T.: SNOMED-CT as standard language for organization and representation of the information in patient records (2014) 0.22

   0.21607265 = sum of:
     0.21607265 = product of:
       0.67522705 = sum of:
         0.02101267 = weight(abstract_txt:show in 1396) [ClassicSimilarity], result of:
           0.02101267 = score(doc=1396,freq=1.0), product of:
             0.0872082 = queryWeight, product of:
               1.012719 = boost
               4.4059124 = idf(docFreq=1466, maxDocs=44218)
               0.019544857 = queryNorm
             0.24094833 = fieldWeight in 1396, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.4059124 = idf(docFreq=1466, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1396)
         0.011939616 = weight(abstract_txt:based in 1396) [ClassicSimilarity], result of:
           0.011939616 = score(doc=1396,freq=1.0), product of:
             0.06848474 = queryWeight, product of:
               1.0991396 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.019544857 = queryNorm
             0.1743398 = fieldWeight in 1396, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1396)
         0.1972644 = weight(abstract_txt:snomed in 1396) [ClassicSimilarity], result of:
           0.1972644 = score(doc=1396,freq=3.0), product of:
             0.21357572 = queryWeight, product of:
               1.1206533 = boost
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.019544857 = queryNorm
             0.9236275 = fieldWeight in 1396, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1396)
         0.06739927 = weight(abstract_txt:health in 1396) [ClassicSimilarity], result of:
           0.06739927 = score(doc=1396,freq=2.0), product of:
             0.15054394 = queryWeight, product of:
               1.330583 = boost
               5.788804 = idf(docFreq=367, maxDocs=44218)
               0.019544857 = queryNorm
             0.44770497 = fieldWeight in 1396, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.788804 = idf(docFreq=367, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1396)
         0.04956541 = weight(abstract_txt:build in 1396) [ClassicSimilarity], result of:
           0.04956541 = score(doc=1396,freq=1.0), product of:
             0.15453337 = queryWeight, product of:
               1.3480979 = boost
               5.8650045 = idf(docFreq=340, maxDocs=44218)
               0.019544857 = queryNorm
             0.32074243 = fieldWeight in 1396, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8650045 = idf(docFreq=340, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1396)
         0.07792936 = weight(abstract_txt:records in 1396) [ClassicSimilarity], result of:
           0.07792936 = score(doc=1396,freq=6.0), product of:
             0.13162869 = queryWeight, product of:
               1.5238115 = boost
               4.4196396 = idf(docFreq=1446, maxDocs=44218)
               0.019544857 = queryNorm
             0.59203935 = fieldWeight in 1396, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.4196396 = idf(docFreq=1446, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1396)
         0.10458281 = weight(abstract_txt:patient in 1396) [ClassicSimilarity], result of:
           0.10458281 = score(doc=1396,freq=1.0), product of:
             0.2542202 = queryWeight, product of:
               1.7290809 = boost
               7.5225 = idf(docFreq=64, maxDocs=44218)
               0.019544857 = queryNorm
             0.41138673 = fieldWeight in 1396, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5225 = idf(docFreq=64, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1396)
         0.14553358 = weight(abstract_txt:ontology in 1396) [ClassicSimilarity], result of:
           0.14553358 = score(doc=1396,freq=1.0), product of:
             0.4810992 = queryWeight, product of:
               4.4500165 = boost
               5.5314693 = idf(docFreq=475, maxDocs=44218)
               0.019544857 = queryNorm
             0.30250221 = fieldWeight in 1396, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5314693 = idf(docFreq=475, maxDocs=44218)
               0.0546875 = fieldNorm(doc=1396)
       0.32 = coord(8/25)