Document (#39112)

Author

Wright, L.W.
Nardini, H.K.G.
Aronson, A.R.
Rindflesch, T.C.

Title

Hierarchical concept indexing of full-text documents in the Unified Medical Language System Information sources Map

Source

Journal of the American Society for Information Science. 50(1999) no.6, S.514-523

Year

1999

Abstract

Full-text documents are a vital and rapidly growing part of online biomedical information. A single large document can contain as much information as a small database, but normally lacks the tight structure and consistent indexing of a database. Retrieval systems will often miss highly relevant parts of a document if the document as a whole appears irrelevant. Access to full-text information is further complicated by the need to search separately many disparate information resources. This research explores how these problems can be addressed by the combined use of 2 techniques: 1) natural language processing for automatic concept-based indexing of full text, and 2) methods for exploiting the structure and hierarchy of full-text documents. We describe methods for applying these techniques to a large collection of full-text documents drawn from the Health Services / Technology Assessment Text (HSTAT) database at the NLM and examine how this hierarchical concept indexing can assist both document- and source-level retrieval in the context of NLM's Information Source Map project

Theme

Computerlinguistik
Wissensrepräsentation

Field

Medizin

Object

UMLS

Similar documents (author)

1. Rindflesch, T.C.; Aronson, A.R.: Semantic processing in information retrieval (1993) 1.90

   1.8985252 = sum of:
     1.8985252 = product of:
       3.7970505 = sum of:
         3.7970505 = weight(author_txt:rindflesch in 4121) [ClassicSimilarity], result of:
           3.7970505 = score(doc=4121,freq=1.0), product of:
             0.78961724 = queryWeight, product of:
               1.1343988 = boost
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.072375424 = queryNorm
             4.808723 = fieldWeight in 4121, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.5 = fieldNorm(doc=4121)
       0.5 = coord(1/2)
   

2. Rindflesch, T.C.; Fizsman, M.: The interaction of domain knowledge and linguistic structure in natural language processing : interpreting hypernymic propositions in biomedical text (2003) 1.90

   1.8985252 = sum of:
     1.8985252 = product of:
       3.7970505 = sum of:
         3.7970505 = weight(author_txt:rindflesch in 2097) [ClassicSimilarity], result of:
           3.7970505 = score(doc=2097,freq=1.0), product of:
             0.78961724 = queryWeight, product of:
               1.1343988 = boost
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.072375424 = queryNorm
             4.808723 = fieldWeight in 2097, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.5 = fieldNorm(doc=2097)
       0.5 = coord(1/2)
   

3. Wright, K.: Social science information characteristics with particular reference to the educational resources information centers (1973) 1.63

   1.6256578 = sum of:
     1.6256578 = product of:
       3.2513156 = sum of:
         3.2513156 = weight(author_txt:wright in 2577) [ClassicSimilarity], result of:
           3.2513156 = score(doc=2577,freq=1.0), product of:
             0.61359966 = queryWeight, product of:
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.072375424 = queryNorm
             5.298757 = fieldWeight in 2577, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.625 = fieldNorm(doc=2577)
       0.5 = coord(1/2)
   

4. Wright, W.E.: ¬The subject approach to knowledge : historical aspects and purposes (1953) 1.63

   1.6256578 = sum of:
     1.6256578 = product of:
       3.2513156 = sum of:
         3.2513156 = weight(author_txt:wright in 3893) [ClassicSimilarity], result of:
           3.2513156 = score(doc=3893,freq=1.0), product of:
             0.61359966 = queryWeight, product of:
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.072375424 = queryNorm
             5.298757 = fieldWeight in 3893, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.625 = fieldNorm(doc=3893)
       0.5 = coord(1/2)
   

5. Wright, K.: Bibliographic database management in an R&D organization : information specialists helping end-users (1992) 1.63

   1.6256578 = sum of:
     1.6256578 = product of:
       3.2513156 = sum of:
         3.2513156 = weight(author_txt:wright in 3990) [ClassicSimilarity], result of:
           3.2513156 = score(doc=3990,freq=1.0), product of:
             0.61359966 = queryWeight, product of:
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.072375424 = queryNorm
             5.298757 = fieldWeight in 3990, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.625 = fieldNorm(doc=3990)
       0.5 = coord(1/2)
   

Similar documents (content)

1. Robertson, S.E.; Sparck Jones, K.: Simple, proven approaches to text retrieval (1997) 0.31

   0.30924663 = sum of:
     0.30924663 = product of:
       0.7731165 = sum of:
         0.070176445 = weight(abstract_txt:exploiting in 4532) [ClassicSimilarity], result of:
           0.070176445 = score(doc=4532,freq=1.0), product of:
             0.15503168 = queryWeight, product of:
               7.24254 = idf(docFreq=85, maxDocs=44218)
               0.021405706 = queryNorm
             0.45265874 = fieldWeight in 4532, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.24254 = idf(docFreq=85, maxDocs=44218)
               0.0625 = fieldNorm(doc=4532)
         0.03725528 = weight(abstract_txt:methods in 4532) [ClassicSimilarity], result of:
           0.03725528 = score(doc=4532,freq=2.0), product of:
             0.10164471 = queryWeight, product of:
               1.1451099 = boost
               4.146752 = idf(docFreq=1900, maxDocs=44218)
               0.021405706 = queryNorm
             0.36652455 = fieldWeight in 4532, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.146752 = idf(docFreq=1900, maxDocs=44218)
               0.0625 = fieldNorm(doc=4532)
         0.046167925 = weight(abstract_txt:large in 4532) [ClassicSimilarity], result of:
           0.046167925 = score(doc=4532,freq=2.0), product of:
             0.11726987 = queryWeight, product of:
               1.2299799 = boost
               4.454089 = idf(docFreq=1397, maxDocs=44218)
               0.021405706 = queryNorm
             0.39368957 = fieldWeight in 4532, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.454089 = idf(docFreq=1397, maxDocs=44218)
               0.0625 = fieldNorm(doc=4532)
         0.048564065 = weight(abstract_txt:techniques in 4532) [ClassicSimilarity], result of:
           0.048564065 = score(doc=4532,freq=2.0), product of:
             0.12129314 = queryWeight, product of:
               1.2509009 = boost
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.021405706 = queryNorm
             0.40038592 = fieldWeight in 4532, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.0625 = fieldNorm(doc=4532)
         0.022240292 = weight(abstract_txt:information in 4532) [ClassicSimilarity], result of:
           0.022240292 = score(doc=4532,freq=2.0), product of:
             0.10393464 = queryWeight, product of:
               2.0056057 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.021405706 = queryNorm
             0.21398345 = fieldWeight in 4532, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.0625 = fieldNorm(doc=4532)
         0.05172282 = weight(abstract_txt:documents in 4532) [ClassicSimilarity], result of:
           0.05172282 = score(doc=4532,freq=1.0), product of:
             0.20080183 = queryWeight, product of:
               2.2761643 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.021405706 = queryNorm
             0.2575814 = fieldWeight in 4532, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.0625 = fieldNorm(doc=4532)
         0.13068551 = weight(abstract_txt:document in 4532) [ClassicSimilarity], result of:
           0.13068551 = score(doc=4532,freq=5.0), product of:
             0.21784177 = queryWeight, product of:
               2.370775 = boost
               4.2926083 = idf(docFreq=1642, maxDocs=44218)
               0.021405706 = queryNorm
             0.59991026 = fieldWeight in 4532, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.2926083 = idf(docFreq=1642, maxDocs=44218)
               0.0625 = fieldNorm(doc=4532)
         0.08598801 = weight(abstract_txt:indexing in 4532) [ClassicSimilarity], result of:
           0.08598801 = score(doc=4532,freq=2.0), product of:
             0.22366333 = queryWeight, product of:
               2.4022443 = boost
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.021405706 = queryNorm
             0.38445285 = fieldWeight in 4532, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.0625 = fieldNorm(doc=4532)
         0.14810435 = weight(abstract_txt:text in 4532) [ClassicSimilarity], result of:
           0.14810435 = score(doc=4532,freq=3.0), product of:
             0.3383221 = queryWeight, product of:
               3.9084446 = boost
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.021405706 = queryNorm
             0.4377614 = fieldWeight in 4532, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.0625 = fieldNorm(doc=4532)
         0.13221182 = weight(abstract_txt:full in 4532) [ClassicSimilarity], result of:
           0.13221182 = score(doc=4532,freq=1.0), product of:
             0.42972454 = queryWeight, product of:
               4.0781245 = boost
               4.922663 = idf(docFreq=874, maxDocs=44218)
               0.021405706 = queryNorm
             0.30766645 = fieldWeight in 4532, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.922663 = idf(docFreq=874, maxDocs=44218)
               0.0625 = fieldNorm(doc=4532)
       0.4 = coord(10/25)
   

2. Dumais, S.T.: Latent semantic analysis (2003) 0.31

   0.3085845 = sum of:
     0.3085845 = product of:
       0.64288443 = sum of:
         0.075469114 = weight(abstract_txt:irrelevant in 2462) [ClassicSimilarity], result of:
           0.075469114 = score(doc=2462,freq=4.0), product of:
             0.16273178 = queryWeight, product of:
               1.024533 = boost
               7.4202213 = idf(docFreq=71, maxDocs=44218)
               0.021405706 = queryNorm
             0.46376383 = fieldWeight in 2462, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               7.4202213 = idf(docFreq=71, maxDocs=44218)
               0.03125 = fieldNorm(doc=2462)
         0.013511328 = weight(abstract_txt:language in 2462) [ClassicSimilarity], result of:
           0.013511328 = score(doc=2462,freq=1.0), product of:
             0.103384376 = queryWeight, product of:
               1.1548676 = boost
               4.1820874 = idf(docFreq=1834, maxDocs=44218)
               0.021405706 = queryNorm
             0.13069023 = fieldWeight in 2462, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1820874 = idf(docFreq=1834, maxDocs=44218)
               0.03125 = fieldNorm(doc=2462)
         0.058866628 = weight(abstract_txt:miss in 2462) [ClassicSimilarity], result of:
           0.058866628 = score(doc=2462,freq=1.0), product of:
             0.21888986 = queryWeight, product of:
               1.1882358 = boost
               8.6058445 = idf(docFreq=21, maxDocs=44218)
               0.021405706 = queryNorm
             0.26893264 = fieldWeight in 2462, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.6058445 = idf(docFreq=21, maxDocs=44218)
               0.03125 = fieldNorm(doc=2462)
         0.036498953 = weight(abstract_txt:large in 2462) [ClassicSimilarity], result of:
           0.036498953 = score(doc=2462,freq=5.0), product of:
             0.11726987 = queryWeight, product of:
               1.2299799 = boost
               4.454089 = idf(docFreq=1397, maxDocs=44218)
               0.021405706 = queryNorm
             0.31123894 = fieldWeight in 2462, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.454089 = idf(docFreq=1397, maxDocs=44218)
               0.03125 = fieldNorm(doc=2462)
         0.024282033 = weight(abstract_txt:techniques in 2462) [ClassicSimilarity], result of:
           0.024282033 = score(doc=2462,freq=2.0), product of:
             0.12129314 = queryWeight, product of:
               1.2509009 = boost
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.021405706 = queryNorm
             0.20019296 = fieldWeight in 2462, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.03125 = fieldNorm(doc=2462)
         0.025341175 = weight(abstract_txt:concept in 2462) [ClassicSimilarity], result of:
           0.025341175 = score(doc=2462,freq=1.0), product of:
             0.17998561 = queryWeight, product of:
               1.8662478 = boost
               4.505458 = idf(docFreq=1327, maxDocs=44218)
               0.021405706 = queryNorm
             0.14079556 = fieldWeight in 2462, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.505458 = idf(docFreq=1327, maxDocs=44218)
               0.03125 = fieldNorm(doc=2462)
         0.023589393 = weight(abstract_txt:information in 2462) [ClassicSimilarity], result of:
           0.023589393 = score(doc=2462,freq=9.0), product of:
             0.10393464 = queryWeight, product of:
               2.0056057 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.021405706 = queryNorm
             0.22696373 = fieldWeight in 2462, product of:
               3.0 = tf(freq=9.0), with freq of:
                 9.0 = termFreq=9.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.03125 = fieldNorm(doc=2462)
         0.08178096 = weight(abstract_txt:documents in 2462) [ClassicSimilarity], result of:
           0.08178096 = score(doc=2462,freq=10.0), product of:
             0.20080183 = queryWeight, product of:
               2.2761643 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.021405706 = queryNorm
             0.40727198 = fieldWeight in 2462, product of:
               3.1622777 = tf(freq=10.0), with freq of:
                 10.0 = termFreq=10.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.03125 = fieldNorm(doc=2462)
         0.04132639 = weight(abstract_txt:document in 2462) [ClassicSimilarity], result of:
           0.04132639 = score(doc=2462,freq=2.0), product of:
             0.21784177 = queryWeight, product of:
               2.370775 = boost
               4.2926083 = idf(docFreq=1642, maxDocs=44218)
               0.021405706 = queryNorm
             0.18970828 = fieldWeight in 2462, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.2926083 = idf(docFreq=1642, maxDocs=44218)
               0.03125 = fieldNorm(doc=2462)
         0.042994004 = weight(abstract_txt:indexing in 2462) [ClassicSimilarity], result of:
           0.042994004 = score(doc=2462,freq=2.0), product of:
             0.22366333 = queryWeight, product of:
               2.4022443 = boost
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.021405706 = queryNorm
             0.19222642 = fieldWeight in 2462, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.03125 = fieldNorm(doc=2462)
         0.1047256 = weight(abstract_txt:text in 2462) [ClassicSimilarity], result of:
           0.1047256 = score(doc=2462,freq=6.0), product of:
             0.3383221 = queryWeight, product of:
               3.9084446 = boost
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.021405706 = queryNorm
             0.30954406 = fieldWeight in 2462, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.03125 = fieldNorm(doc=2462)
         0.114498794 = weight(abstract_txt:full in 2462) [ClassicSimilarity], result of:
           0.114498794 = score(doc=2462,freq=3.0), product of:
             0.42972454 = queryWeight, product of:
               4.0781245 = boost
               4.922663 = idf(docFreq=874, maxDocs=44218)
               0.021405706 = queryNorm
             0.26644695 = fieldWeight in 2462, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.922663 = idf(docFreq=874, maxDocs=44218)
               0.03125 = fieldNorm(doc=2462)
       0.48 = coord(12/25)
   

3. Cumyn, M.; Reiner, G.; Mas, S.; Lesieur, D.: Legal knowledge representation using a faceted scheme (2019) 0.26

   0.2612183 = sum of:
     0.2612183 = product of:
       1.0884097 = sum of:
         0.12288197 = weight(abstract_txt:database in 5788) [ClassicSimilarity], result of:
           0.12288197 = score(doc=5788,freq=2.0), product of:
             0.16241598 = queryWeight, product of:
               1.7728206 = boost
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.021405706 = queryNorm
             0.7565879 = fieldWeight in 5788, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.125 = fieldNorm(doc=5788)
         0.03145252 = weight(abstract_txt:information in 5788) [ClassicSimilarity], result of:
           0.03145252 = score(doc=5788,freq=1.0), product of:
             0.10393464 = queryWeight, product of:
               2.0056057 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.021405706 = queryNorm
             0.3026183 = fieldWeight in 5788, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.125 = fieldNorm(doc=5788)
         0.14629422 = weight(abstract_txt:documents in 5788) [ClassicSimilarity], result of:
           0.14629422 = score(doc=5788,freq=2.0), product of:
             0.20080183 = queryWeight, product of:
               2.2761643 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.021405706 = queryNorm
             0.72855026 = fieldWeight in 5788, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.125 = fieldNorm(doc=5788)
         0.17197601 = weight(abstract_txt:indexing in 5788) [ClassicSimilarity], result of:
           0.17197601 = score(doc=5788,freq=2.0), product of:
             0.22366333 = queryWeight, product of:
               2.4022443 = boost
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.021405706 = queryNorm
             0.7689057 = fieldWeight in 5788, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.125 = fieldNorm(doc=5788)
         0.24185342 = weight(abstract_txt:text in 5788) [ClassicSimilarity], result of:
           0.24185342 = score(doc=5788,freq=2.0), product of:
             0.3383221 = queryWeight, product of:
               3.9084446 = boost
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.021405706 = queryNorm
             0.7148614 = fieldWeight in 5788, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.125 = fieldNorm(doc=5788)
         0.37395152 = weight(abstract_txt:full in 5788) [ClassicSimilarity], result of:
           0.37395152 = score(doc=5788,freq=2.0), product of:
             0.42972454 = queryWeight, product of:
               4.0781245 = boost
               4.922663 = idf(docFreq=874, maxDocs=44218)
               0.021405706 = queryNorm
             0.87021214 = fieldWeight in 5788, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.922663 = idf(docFreq=874, maxDocs=44218)
               0.125 = fieldNorm(doc=5788)
       0.24 = coord(6/25)
   

4. O'Leary, M.: ProQuest direct delivers UMI goods (1996) 0.26

   0.25548553 = sum of:
     0.25548553 = product of:
       0.7983923 = sum of:
         0.039515194 = weight(abstract_txt:methods in 4960) [ClassicSimilarity], result of:
           0.039515194 = score(doc=4960,freq=1.0), product of:
             0.10164471 = queryWeight, product of:
               1.1451099 = boost
               4.146752 = idf(docFreq=1900, maxDocs=44218)
               0.021405706 = queryNorm
             0.388758 = fieldWeight in 4960, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.146752 = idf(docFreq=1900, maxDocs=44218)
               0.09375 = fieldNorm(doc=4960)
         0.0734995 = weight(abstract_txt:source in 4960) [ClassicSimilarity], result of:
           0.0734995 = score(doc=4960,freq=1.0), product of:
             0.15373224 = queryWeight, product of:
               1.4082743 = boost
               5.0997415 = idf(docFreq=732, maxDocs=44218)
               0.021405706 = queryNorm
             0.47810078 = fieldWeight in 4960, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.0997415 = idf(docFreq=732, maxDocs=44218)
               0.09375 = fieldNorm(doc=4960)
         0.09216148 = weight(abstract_txt:database in 4960) [ClassicSimilarity], result of:
           0.09216148 = score(doc=4960,freq=2.0), product of:
             0.16241598 = queryWeight, product of:
               1.7728206 = boost
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.021405706 = queryNorm
             0.5674409 = fieldWeight in 4960, 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=4960)
         0.023589393 = weight(abstract_txt:information in 4960) [ClassicSimilarity], result of:
           0.023589393 = score(doc=4960,freq=1.0), product of:
             0.10393464 = queryWeight, product of:
               2.0056057 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.021405706 = queryNorm
             0.22696373 = fieldWeight in 4960, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.09375 = fieldNorm(doc=4960)
         0.15184283 = weight(abstract_txt:document in 4960) [ClassicSimilarity], result of:
           0.15184283 = score(doc=4960,freq=3.0), product of:
             0.21784177 = queryWeight, product of:
               2.370775 = boost
               4.2926083 = idf(docFreq=1642, maxDocs=44218)
               0.021405706 = queryNorm
             0.6970327 = fieldWeight in 4960, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.2926083 = idf(docFreq=1642, maxDocs=44218)
               0.09375 = fieldNorm(doc=4960)
         0.091204055 = weight(abstract_txt:indexing in 4960) [ClassicSimilarity], result of:
           0.091204055 = score(doc=4960,freq=1.0), product of:
             0.22366333 = queryWeight, product of:
               2.4022443 = boost
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.021405706 = queryNorm
             0.40777382 = fieldWeight in 4960, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.09375 = fieldNorm(doc=4960)
         0.12826213 = weight(abstract_txt:text in 4960) [ClassicSimilarity], result of:
           0.12826213 = score(doc=4960,freq=1.0), product of:
             0.3383221 = queryWeight, product of:
               3.9084446 = boost
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.021405706 = queryNorm
             0.37911248 = fieldWeight in 4960, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.09375 = fieldNorm(doc=4960)
         0.19831775 = weight(abstract_txt:full in 4960) [ClassicSimilarity], result of:
           0.19831775 = score(doc=4960,freq=1.0), product of:
             0.42972454 = queryWeight, product of:
               4.0781245 = boost
               4.922663 = idf(docFreq=874, maxDocs=44218)
               0.021405706 = queryNorm
             0.4614997 = fieldWeight in 4960, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.922663 = idf(docFreq=874, maxDocs=44218)
               0.09375 = fieldNorm(doc=4960)
       0.32 = coord(8/25)
   

5. Hersh, W.R.; Hickam, D.H.: ¬A comparison of two methods for indexing and retrieval from a full-text medical database (1992) 0.25

   0.24987373 = sum of:
     0.24987373 = product of:
       0.7808554 = sum of:
         0.0728461 = weight(abstract_txt:techniques in 4526) [ClassicSimilarity], result of:
           0.0728461 = score(doc=4526,freq=2.0), product of:
             0.12129314 = queryWeight, product of:
               1.2509009 = boost
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.021405706 = queryNorm
             0.6005789 = fieldWeight in 4526, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.09375 = fieldNorm(doc=4526)
         0.06516801 = weight(abstract_txt:database in 4526) [ClassicSimilarity], result of:
           0.06516801 = score(doc=4526,freq=1.0), product of:
             0.16241598 = queryWeight, product of:
               1.7728206 = boost
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.021405706 = queryNorm
             0.40124136 = fieldWeight in 4526, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.09375 = fieldNorm(doc=4526)
         0.07602353 = weight(abstract_txt:concept in 4526) [ClassicSimilarity], result of:
           0.07602353 = score(doc=4526,freq=1.0), product of:
             0.17998561 = queryWeight, product of:
               1.8662478 = boost
               4.505458 = idf(docFreq=1327, maxDocs=44218)
               0.021405706 = queryNorm
             0.42238668 = fieldWeight in 4526, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.505458 = idf(docFreq=1327, maxDocs=44218)
               0.09375 = fieldNorm(doc=4526)
         0.023589393 = weight(abstract_txt:information in 4526) [ClassicSimilarity], result of:
           0.023589393 = score(doc=4526,freq=1.0), product of:
             0.10393464 = queryWeight, product of:
               2.0056057 = boost
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.021405706 = queryNorm
             0.22696373 = fieldWeight in 4526, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4209464 = idf(docFreq=10677, maxDocs=44218)
               0.09375 = fieldNorm(doc=4526)
         0.087666504 = weight(abstract_txt:document in 4526) [ClassicSimilarity], result of:
           0.087666504 = score(doc=4526,freq=1.0), product of:
             0.21784177 = queryWeight, product of:
               2.370775 = boost
               4.2926083 = idf(docFreq=1642, maxDocs=44218)
               0.021405706 = queryNorm
             0.40243202 = fieldWeight in 4526, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2926083 = idf(docFreq=1642, maxDocs=44218)
               0.09375 = fieldNorm(doc=4526)
         0.12898201 = weight(abstract_txt:indexing in 4526) [ClassicSimilarity], result of:
           0.12898201 = score(doc=4526,freq=2.0), product of:
             0.22366333 = queryWeight, product of:
               2.4022443 = boost
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.021405706 = queryNorm
             0.5766793 = fieldWeight in 4526, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.09375 = fieldNorm(doc=4526)
         0.12826213 = weight(abstract_txt:text in 4526) [ClassicSimilarity], result of:
           0.12826213 = score(doc=4526,freq=1.0), product of:
             0.3383221 = queryWeight, product of:
               3.9084446 = boost
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.021405706 = queryNorm
             0.37911248 = fieldWeight in 4526, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.0438666 = idf(docFreq=2106, maxDocs=44218)
               0.09375 = fieldNorm(doc=4526)
         0.19831775 = weight(abstract_txt:full in 4526) [ClassicSimilarity], result of:
           0.19831775 = score(doc=4526,freq=1.0), product of:
             0.42972454 = queryWeight, product of:
               4.0781245 = boost
               4.922663 = idf(docFreq=874, maxDocs=44218)
               0.021405706 = queryNorm
             0.4614997 = fieldWeight in 4526, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.922663 = idf(docFreq=874, maxDocs=44218)
               0.09375 = fieldNorm(doc=4526)
       0.32 = coord(8/25)